Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Early BN4 Eberspächer Restoration Bay Window Bus 68-72
Page: Previous  1, 2, 3  Next
Forum Index -> Bay Window Bus Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Sun Jan 21, 2018 9:41 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

One interesting thing to note about these early ones. Ive made comment on how these weigh more than the later ones. Other than the obvious differences like the "extra" stuff on them, these are constructed with older tech for sure. Its the difference between a 1950 Plymouth 4 door and a 1972 Camero. Everything is over engineered in this unit as apposed to what was sufficient on the later ones. Just an interesting side note.


Image may have been reduced in size. Click image to view fullscreen.



Oh and made it to 2 pages - boom bitch!
_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
Terminatez
Samba Member


Joined: June 07, 2015
Posts: 340
Location: Sun Valley, CA
Terminatez is offline 

PostPosted: Sun Jan 21, 2018 9:44 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Do these being over engineered make them better than the later ones or less reliable because of it?

Whats your opinion?
_________________
1972 Westfalia P30 hardtop Campmobile [On-going Restoration]
aeromech wrote:
I don't think I've ever seen an engine in worse shape.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Sun Jan 21, 2018 9:47 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Terminatez wrote:
Do these being over engineered make them better than the later ones or less reliable because of it?

Whats your opinion?



Neither. The lack of parts and the complexity based on the times tech makes them a harder rebuild. Its all about the diaphragms. If thats gets figured out in the metering portion then they are fine to rebuild. There seems to be as many of these out there as the later ones. It just takes people willing to figure out the resto puzzle is all.
_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
ratherb-buggin
Samba Member


Joined: January 30, 2005
Posts: 985
Location: Shawnee, KS
ratherb-buggin is offline 

PostPosted: Thu Feb 01, 2018 9:44 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

You're doing a great job on this Jason, thank you!! I'll be one proud mofo to run this! Thank you!!
Back to top
View user's profile Send private message Instagram Gallery Classifieds Feedback
bartul1981
Samba Member


Joined: July 03, 2016
Posts: 40

bartul1981 is offline 

PostPosted: Tue Apr 03, 2018 5:52 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Great job!!!!

Is this 6 or 8mm?
you know what is the rubber buffer size?

Thanks
Image may have been reduced in size. Click image to view fullscreen.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Tue Nov 05, 2019 10:02 am    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Its time to get back into this early BN4 thread. Poor John has been waiting patiently for his gray baby bomb from me.

I made a new work space on the other side of the garage that allows me to get to all my smalls. Gas heaters have lots of little bits and pieces and I have lots of them. Laughing

Im also excited that Angleofattack is making regulator diaphragms because I have 3 other heaters behind this one that are in great shape. So Ill be integrating them into an upcoming build.

https://www.thesamba.com/vw/forum/viewtopic.php?t=727428

With the fuel pumps, I think all the pumps Ive pulled apart, cleaned and replaced one or two of the diaphragm with the material I have, all work. With the 2 nos ones I have, the count is up to maybe 7 total good usable pumps. Ill have to check.

In any case its that time of year where the interest in the FB site, Chinese Dizel here and random ?? from You tube vids warrants getting back on it. People seem to always wait till last minute to put that heat in the bus. Laughing

So stay tuned and we'll see what starts to cook. Cool


Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Wed Nov 13, 2019 8:48 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Yep. Its getting colder out. Every year without fail there is a mass influx of people wanting to keep warm in their VW. More often than not they gravitate to the gas heater. With the advent of the cheap Chinese heater and its popularity growing, gas heater interest and restoration is higher than ever.

As said previously, Jeronimo - Angleofattack has 3D printed a replacement pressure regulator diaphragm and graciously sent me one to compare to the NOS one we have for this early BN4 build for ratherb-buggin.

With my new station set up for tinkering, I pulled out all the early BN4 stuff to get cracking again on the rebuild.


Image may have been reduced in size. Click image to view fullscreen.



Some shots side by side of what we are dealing with - two pressure regulators being taken apart. The NOS one is on the left. Curiously it did not come with the electromagnet needed to operate it. So I took it from the one on the right - good use and working one. I will be putting the new 3D printed diaphragm into the unit on the right as well as putting yet another electromagnet into it from some other spares.



Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.


Lots of parts swapping to essentially get the NOS one ready with an electromagnet and putting together a good used one with the new 3D printed diaphragm.


Image may have been reduced in size. Click image to view fullscreen.


Upon close inspection, the nos and repop are very close to flexibility. Lord only knows exactly how the nos one should be as it is a 40 ish-year-old new part.

Next on the docket will be to pull the unit apart and repaint it. There are some scratches from moving around from Seattle to San Diego that I don't like.
_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
Angleofattack
Samba Member


Joined: May 07, 2017
Posts: 31
Location: Atlanta, Ga, USA
Angleofattack is offline 

PostPosted: Thu Nov 14, 2019 7:51 am    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Looking great!!!! Glad you got the prototype... I just got back from a 10 day trip and first thing I did was to inspect the diaphragm material I left immersed in fuel. Looking good in terms of texture, resistance and flexibility, but as expected, it increased volume by about 8%.

I suspect this increase in volume is excessive for the current design thickness and because the diaphragm can not expand outwards because it is clamped, it expands inwards, creating a force that adds to the spring, therefore it will burn rich even with the spring screw all out.

I will try to print a thinner version and give it a try in my heater today. I will also print a couple more for Jason and Jay. I need help to improve the design.

Another thought I am entertaining is to print them at 92% scale so that a pre-soak would expand them to correct size.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Thu Nov 14, 2019 8:09 am    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Angleofattack wrote:
Looking great!!!! Glad you got the prototype... I just got back from a 10 day trip and first thing I did was to inspect the diaphragm material I left immersed in fuel. Looking good in terms of texture, resistance and flexibility, but as expected, it increased volume by about 8%.

I suspect this increase in volume is excessive for the current design thickness and because the diaphragm can not expand outwards because it is clamped, it expands inwards, creating a force that adds to the spring, therefore it will burn rich even with the spring screw all out.

I will try to print a thinner version and give it a try in my heater today. I will also print a couple more for Jason and Jay. I need help to improve the design.

Another thought I am entertaining is to print them at 92% scale so that a pre-soak would expand them to correct size.



Maybe a weaker spring would also help the rich burning?
_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
Angleofattack
Samba Member


Joined: May 07, 2017
Posts: 31
Location: Atlanta, Ga, USA
Angleofattack is offline 

PostPosted: Thu Nov 14, 2019 2:48 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

No, I would not change the spring, it is a question of getting the diaphragm not to produce excessive force, and if it gets out of range, it is easier to re calibrate by adding thin washers to the outer cup screws.
I have done this with very good results.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Tue Nov 19, 2019 8:11 am    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Slow week on the Eber. Just ended up repainting the shell twice. The first time it was so hot outside, like 85f the paint dried in the air and left a grit on it. Sanded that off and painted again when it was cool. Looks better then when I did it months ago. 😎


Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
Angleofattack
Samba Member


Joined: May 07, 2017
Posts: 31
Location: Atlanta, Ga, USA
Angleofattack is offline 

PostPosted: Thu Nov 21, 2019 1:56 am    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

My latest version of the diaphragm is installed, and the BN4 running like in its best days.

I calibrated it to 20cc / 2 mins and the exhaust was showing too much black smoke. Just by hand and looking at the exhaust, I went down on the mixture until smoke disappeared. But I am sure I am at less than 20cc/2mins. I am guessing at 17cc. Not really sure why the factory specs do not work right... maybe the type of fuel used in the old days? Maybe my fan/combustion chamber are not creating the right air flow? No idea, but it runs so good. And starts every time as expected.

What a satisfaction after two years of messing with it... so many hours dedicated to this can!

Lets now see how much time my diaphragm material/design works...
I can make them so cheap, if they last one winter, I am happy. If they last two winters, mission accomplished.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Thu Nov 21, 2019 1:20 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Angleofattack wrote:
My latest version of the diaphragm is installed, and the BN4 running like in its best days.

I calibrated it to 20cc / 2 mins and the exhaust was showing too much black smoke. Just by hand and looking at the exhaust, I went down on the mixture until smoke disappeared. But I am sure I am at less than 20cc/2mins. I am guessing at 17cc. Not really sure why the factory specs do not work right... maybe the type of fuel used in the old days? Maybe my fan/combustion chamber are not creating the right air flow? No idea, but it runs so good. And starts every time as expected.

What a satisfaction after two years of messing with it... so many hours dedicated to this can!

Lets now see how much time my diaphragm material/design works...
I can make them so cheap, if they last one winter, I am happy. If they last two winters, mission accomplished.


Im looking forward to it. I should be into test mode on the diaphragm as well after this one gets done.

This one's coming back together nicely.


Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Sat Nov 23, 2019 9:49 am    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

All the wires have been chased, the bits cleaned and assembled. Had to use the wiring diagram and even an unrestored unit to see where all the pieces went. No wonders they simplified this Shocked There is a lot going on Laughing

Then the moment of truth, It turned on and worked. Cool

I need to take the OG banjo fittings apart and put new fuel line on, then we see if she fires Twisted Evil



Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

Image may have been reduced in size. Click image to view fullscreen.

_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Sun Dec 01, 2019 5:05 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

After confirming that all the systems were working, I pulled all the old braided fuel lines apart, too the banjo fittings off so that new fuel lines could be used. Kind of a pain in the ass to undo as the OG fuel lines are so well put together.

With the fuel lines on and the metering pump regulator set, I poured in some Camping Fuel and fired her off. With a couple of leaks from the filter fixed, she otherwise fired quick and ran well.

I was able to hook up an OG switch as well to see how she would run. The switch is pretty cool. I'm still kinda taken aback at how this whole set up is chunkier than the later BN4's. With the mechanical pumps and the overall weight of the unit itself and even the switch, it just gives an air of quality built for some reason Cool Laughing They definitely don't build like this anymore.

Next Ill be painting up the rest of the ducting and sending John his complete ready to use unit.


Link

_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
Angleofattack
Samba Member


Joined: May 07, 2017
Posts: 31
Location: Atlanta, Ga, USA
Angleofattack is offline 

PostPosted: Sun Dec 01, 2019 8:04 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Bravo Jason!
Did you calibrate the pressure regulator or just assumed it was still set?
Jerome
Back to top
View user's profile Send private message Gallery Classifieds Feedback
notchboy
Samba Member


Joined: April 27, 2002
Posts: 22416
Location: Escondido CA
notchboy is offline 

PostPosted: Sun Dec 01, 2019 8:09 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Angleofattack wrote:
Bravo Jason!
Did you calibrate the pressure regulator or just assumed it was still set?
Jerome


Not yet. Can't find the cc beakers and I ran out of fuel. Calibration clarification to come.
_________________
t3kg wrote:

OK, this thread is over. You win.

Jason "notchboy" Weigel
1964 1500 S
1964 T34 S Convertible
1977 Westfalia Camper pop-top
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
TomWesty
Samba Member


Joined: November 23, 2007
Posts: 3482
Location: Wyoming,USA
TomWesty is offline 

PostPosted: Sun Dec 01, 2019 8:46 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Nice work! That is some serious Mad Scientist stuff. Cool
_________________
If you haven't bled on them, you haven't worked on them.
Visit: www.tomcoryell.com and check out my music!
Back to top
View user's profile Send private message Visit poster's website Classifieds Feedback
Lionhart94010
Samba Member


Joined: January 04, 2005
Posts: 1417
Location: SF Bay Area / Silicon Valley / So Cal
Lionhart94010 is offline 

PostPosted: Tue Jul 14, 2020 8:47 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Great Post!

Can I ask what replacement fuel hose you used, and did you use any small hose clamps ?

My BN4 wokds but I am leary of the old fuel lines and there is a bit of fuel staining on the outside of the cloth braided hose after it runs a while...
_________________
Current VWs 71 T2 Westy SO-72/6(Miami), 71 Crew Cab, 2015 GSW TDI
Other owned VW’s 59, 68 1500s, 69 & 71 Bug’s; 72 & 73 S-Bug’s; 67 Westy, 67 Deluxe, Other 71 DC, 72 KG GT that now lives in Australia, 12 JSW TDI, 2015 GSW TDI, 2023 Tiguan
VW technical information sights
thesamba - www.ratwell.com - www.shoptalkforums.com/ - www.vw-resource.com - http://www.type2.com/
http://bobhooversblog.blogspot.com/ - www.aircooled.net/gnrlsite/resource/articles.htm
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Ollie W
Samba Member


Joined: May 20, 2004
Posts: 797
Location: Portland, OR
Ollie W is offline 

PostPosted: Sat Jun 12, 2021 9:58 pm    Post subject: Re: Early BN4 Eberspächer Restoration Bay Window Bus 68-72 Reply with quote

Hello all,

Any help getting my fuel pump going? https://youtu.be/ssTqL6466Og

Thanks
Back to top
View user's profile Send private message Send e-mail Facebook Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Bay Window Bus All times are Mountain Standard Time/Pacific Daylight Savings Time
Page: Previous  1, 2, 3  Next
Page 2 of 3

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2023, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB
Links to eBay or other vendor sites may be affiliate links where the site receives compensation.