| Author |
Message |
brainwash
Samba Member
Joined: June 22, 2014
Posts: 64
|
 Posted: Sat Mar 07, 2015 12:46 pm Post subject: What am I Missing Here? Big gaps in Exhaust? |
 |
|
My 78 bus has some large gaps entering the fan shroud here. Are these normal? Is it missing a top piece? TIA!
|
|
| Back to top |
|
 |
grtfldan
Samba Member
Joined: December 06, 2007
Posts: 141
Location: Maryland
|
| Posted: Sat Mar 07, 2015 1:44 pm Post subject: |
|
|
theres covers that look like this:
_________________
79 Bay 2.0 Fuel Injection
79 Bay project |
|
| Back to top |
|
|
Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
|
|
| Back to top |
|
|
PITApan
Samba Member
Joined: November 09, 2014
Posts: 1058
Location: Northern Colorado
|
| Posted: Sat Mar 07, 2015 2:22 pm Post subject: |
|
|
| Not exhaust, part of the heating system. The lower flaps and covers are missing. So you have cooling air dumping to the outside without doing any cooling in the heater boxes and without feeding hot air forward to the cab. I'm just installing mine if you want to see the pics. |
|
| Back to top |
|
|
brainwash
Samba Member
Joined: June 22, 2014
Posts: 64
|
| Posted: Sat Mar 07, 2015 2:56 pm Post subject: |
|
|
| Hey, thanks everyone! Appreciate the correction as well as all the pics and diagrams. PITA Pan, I'll also take you up on the offer to see your pics of the installation you did. |
|
| Back to top |
|
|
PITApan
Samba Member
Joined: November 09, 2014
Posts: 1058
Location: Northern Colorado
|
| Posted: Sat Mar 07, 2015 3:08 pm Post subject: |
|
|
| brainwash wrote: |
| Hey, thanks everyone! Appreciate the correction as well as all the pics and diagrams. PITA Pan, I'll also take you up on the offer to see your pics of the installation you did. |
It's in progress. I'm doing a molded gasket instead of a paper one, so I have been documenting that. I'll take pics of the next two steps in the process, than that will make sense.
SO far this is the setup for molding the gaskets. The molding material will be grey RTV silicone. The insides of the covers have been sandblasted and then small silicone discs have been stuck down to establish the gasket thickness.
The next step is to glop on the silicone and bolt them in place on the motor. The silicone cures then they come off, get trimmed, and the final install with the flaps. |
|
| Back to top |
|
|
raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21513
Location: Oklahoma City
|
| Posted: Sat Mar 07, 2015 3:20 pm Post subject: |
|
|
| Nice! You can also dilute RTV, build clay or tape dams around the area and pour the RTV in. Ray |
|
| Back to top |
|
|
brainwash
Samba Member
Joined: June 22, 2014
Posts: 64
|
| Posted: Sat Mar 07, 2015 3:24 pm Post subject: |
|
|
| That's quite the project you've got going there, PITApan! Quite impressive. I'd have no idea how to do that, but will take some lessons here. |
|
| Back to top |
|
|
PITApan
Samba Member
Joined: November 09, 2014
Posts: 1058
Location: Northern Colorado
|
| Posted: Sat Mar 07, 2015 3:36 pm Post subject: |
|
|
| raygreenwood wrote: |
| Nice! You can also dilute RTV, build clay or tape dams around the area and pour the RTV in. Ray |
I have some two part RTV. KISS. Also, this gives me a very close capture of the opposing surface.
I did this routine on the rocker covers on another engine. I was tired of weepy gaskets and replacing them. I used red RTV but too soft. It's holding up so far, and weep free, but will have to see how many remove/replace cycles it will take. These things come off every 15 years if the engine is good. |
|
| Back to top |
|
|
Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
|
| Posted: Sat Mar 07, 2015 4:02 pm Post subject: Heat exchanger Fan shroud Air inlet cover plates and gaskets |
|
|
Google these part numbers.
021 256 321 D/ LEFT COVER PLATE, L, EXHAUST PREVENTS HEAT LEAKS
021 256 322 B/ RIGHT COVER PLATE, R, EXHAUST PREVENTS HEAT LEAKS
Thread on subject.
Non-return Flap Pins
Gaskets:
Thanks to Mayor Ratwell
Making Fan Shroud Gaskets
Good Luck
Tcash
Last edited by Tcash on Sun Mar 08, 2015 12:18 pm; edited 3 times in total |
|
| Back to top |
|
|
PITApan
Samba Member
Joined: November 09, 2014
Posts: 1058
Location: Northern Colorado
|
| Posted: Sat Mar 07, 2015 4:04 pm Post subject: Re: Heat exchanger cover plates |
|
|
| Tcash wrote: |
/snip
There is a nice post on making the gaskets. But I cannot find it.
Good Luck
Tcash |
'cause I haven't finished it yet.  |
|
| Back to top |
|
|
Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
|
| Posted: Sat Mar 07, 2015 4:14 pm Post subject: Re: Heat exchanger cover plates |
|
|
| PITApan wrote: |
| Tcash wrote: |
/snip
There is a nice post on making the gaskets. But I cannot find it.
Good Luck
Tcash |
'cause I haven't finished it yet. |
GET ER DONE |
|
| Back to top |
|
|
PITApan
Samba Member
Joined: November 09, 2014
Posts: 1058
Location: Northern Colorado
|
| Posted: Sat Mar 07, 2015 4:22 pm Post subject: |
|
|
These are the holes you've noticed and the holes with the covers on. On the holes notice the ears with the bores for the flap pins. Rights then lefts.
|
|
| Back to top |
|
|
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50338
|
| Posted: Sat Mar 07, 2015 4:54 pm Post subject: |
|
|
| I will repeat my method here as it is easy and works well. I use high temperature copper silicone and lay a bead on the cover and then let it skim over well but not fully set. I then install the cover and tighten it until the silicone makes a good contact with the fan shroud and heater box. If the skin breaks in a few places then so much the better as it will help lock the heat exchanger cover to the fan shroud and prevent wear between the two, but since most of the silicone stays skimmed over the cover is still readily removable and can be reinstalled using a minimal amount of new silicone. |
|
| Back to top |
|
|
Bleyseng
Samba Member
Joined: July 03, 2005
Posts: 4752
Location: Seattle
|
| Posted: Sat Mar 07, 2015 7:59 pm Post subject: |
|
|
The real gaskets are available guys instead of RTV.
_________________
70 Ghia Black convert-9/69 build date-stock w/133k 1600 SP-barn find now with a rebuilt tranny and engine
77 Westy 2.0L w/Ljet, Camper Special engine-95hp and with LSD!(sold)
76 Porsche 914 2.1L L20c, 120hp Djet (sold)
87 Syncro Westy Titan Red 2.1L 2 knob 100k miles |
|
| Back to top |
|
|
Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50338
|
| Posted: Sat Mar 07, 2015 8:03 pm Post subject: |
|
|
| Bleyseng wrote: |
| The real gaskets are available guys instead of RTV. |
Yes but RTV will do a much better sealing job on old deteriorated surfaces. |
|
| Back to top |
|
|
Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
|
|
| Back to top |
|
|
oscarsnapkin
Samba Member
Joined: October 22, 2013
Posts: 558
Location: Bucks County, PA
|
| Posted: Sun Mar 08, 2015 2:41 am Post subject: |
|
|
I did this a few months back. I used a sheet of cork gasket material and the diagrams from Ratwell's site.
http://www.ratwell.com/technical/Heating.html#gaskets
To be honest, I had my wife do the work. She's much better at that type of thing that I am. I don't have the patience/attention for small detailed work.
_________________
- 1977 CEI Sunroof Bus 2.0L F.I. Hydraulic Lifters
- 1973 Thing
"It’s so easy to laugh, it’s so easy to hate, it takes strength to be gentle and kind." |
|
| Back to top |
|
|
aerosurfer
Samba Member
Joined: March 25, 2012
Posts: 1602
Location: Indianapolis, IN
|
| Posted: Sun Mar 08, 2015 7:44 am Post subject: |
|
|
| oscarsnapkin wrote: |
I did this a few months back. I used a sheet of cork gasket material and the diagrams from Ratwell's site.
http://www.ratwell.com/technical/Heating.html#gaskets
To be honest, I had my wife do the work. She's much better at that type of thing that I am. I don't have the patience/attention for small detailed work. |
I made them too from cork/ Ratwell. I used RTV to seat and seal them as well. Easy and straightforward
_________________
Rebuild your own FI Harness..My Harness
77 Westy 2.0L Rockin and Rolling Resto!
72 Sportsmobile (sold)
79 Tran$porter... Parts car money machine (gone) |
|
| Back to top |
|
|
VW Addict 
Samba Salesman
Joined: January 09, 2003
Posts: 3920
|
| Posted: Tue Aug 18, 2015 2:35 pm Post subject: Re: Heat exchanger Fan shroud Air inlet cover plates and gas |
|
|
| Tcash wrote: |
Google these part numbers.
021 256 321 D/ LEFT COVER PLATE, L, EXHAUST PREVENTS HEAT LEAKS
021 256 322 B/ RIGHT COVER PLATE, R, EXHAUST PREVENTS HEAT LEAKS
Thread on subject.
Non-return Flap Pins
Gaskets:
Thanks to Mayor Ratwell
Making Fan Shroud Gaskets
Good Luck
Tcash |
Is (Right) side considered passenger side? |
|
| Back to top |
|
|
|
