Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts New!  See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Dual relief oiling system. How it works.
Page: Previous  1, 2, 3, 4, 5, 6, 7, 8, 9
Forum Index -> Performance/Engines/Transmissions 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
Juanito84
Samba Member


Joined: March 17, 2012
Posts: 2436
Location: Colorado Mountains
Juanito84 is offline 

PostPosted: Mon Nov 24, 2014 11:33 am    Post subject: Reply with quote

mark tucker wrote:
THE IDLE PRESSURE HAS NOTHING TO DO WITH THE COOLER RELIEF


Did you read page 1?
_________________
If a water cooled engine cools its water with air, isn't it just an overcomplicated air cooled engine?
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
ozzo
Samba Member


Joined: November 14, 2014
Posts: 192
Location: italy
ozzo is offline 

PostPosted: Wed Dec 03, 2014 6:46 am    Post subject: Reply with quote

I installed a vdo for oil pressure.
After 30 min driving
Idle 1 bar or 15 psi
3000 rpm 3 bar or 45 psi

Even increasing rpm pressure does not go higher than 3.5 bar warm engine.

Looks good or idle pressure is to high?
This is a european 1978 as 1600 case.... probably the pressure control bleed off is already increased because i m getting this reading with 15/40 mineral oil and 30mm pump.
Back to top
View user's profile Send private message Visit poster's website Gallery Classifieds Feedback
mbw65bug
Samba Member


Joined: December 19, 2013
Posts: 25
Location: Japan Hokkaido
mbw65bug is offline 

PostPosted: Wed Mar 30, 2016 6:05 am    Post subject: Re: Dual relief oiling system. How it works. Reply with quote

I don't think many ppl wanna read this old thread again, but I really wanna share my experience;

I decided to use 32mm pump.
My case is AS.
I enlarged the relief hole to control the pressure from 5 to 10mm.
I put 20-50 oil into the motor.
The temperature is 5℃, so 41℉.

When I started the motor, the pressure was around 3bar at 1500rpm, and even after kept idling for a half of a hour, it remained at same. VDO oil temperature gauge hadnt moved.
I revved it to 4000rpm immoderately after I started it, and the pressure was slightly less than 5bar throughout the reving, which exactly I had expected when I measured the rate of the spring of the oil pressure relief valve. So, it was great.

What was not great is I can't open the relief valve of the oil cooler. It's supposed to open more than 6bar. The pressure hardly go beyond 6 unless I recklessly rev it.

I think I enlarged the relief hole a bit too much. I hope someone can learn from my failure and figure out the ideal size for 32mm pump.
Back to top
View user's profile Send private message Facebook Gallery Classifieds Feedback
grandpanystrom61
Samba Member


Joined: February 01, 2018
Posts: 27
Location: fernley nevada
grandpanystrom61 is offline 

PostPosted: Thu Mar 22, 2018 9:10 am    Post subject: Re: Dual relief oiling system. How it works. Reply with quote

wonderful thread, read it all, and still have the same question as I did not find the 1600 DP mexico AS41 engine produced in aug 1973.

I have the front control valve with the rear relief valve, pulley end.
Now the control valve has a short spring with a solid plunger, and with mild force I can screw the plug back in against the spring tension.

Now that relief plunger is got the grove in it, and has a much longer spring, and it takes a lot of force against the plug against the spring to get the threads started so I can screw it in until seated tight.

I found all this out as I was putting the temp. sensor in place of the plug at the relief valve, pulley end.

Sensor is to big for oil drain plug location, so I used the relief valve port ???? good idea or very bad one........

Would it be better located at the control valve location ?

I found out I have no oil cooler on the engine, a bypass plate was installed on the motor when fan shroud was changed, but some one just looped the a hose on the ports.

So have the smaller external oil cooler on order, will mount an the backside of the fan shroud area where those oil ports are.

What about these relief valves... mine are flat on one side and cupped on the other side......so does flat side go in first, cup side rides on the spring ?

Or does the flat side ride on the spring and the cup side faces upward when putting it into the case ?????



Help me........
Back to top
View user's profile Send private message Gallery Classifieds Feedback
ALB
Samba Member


Joined: August 05, 2008
Posts: 3434
Location: beautiful suburban Wet Coast of Canada
ALB is offline 

PostPosted: Thu Mar 22, 2018 10:45 am    Post subject: Re: Dual relief oiling system. How it works. Reply with quote

Don't mount a cooler to the back side of the shroud- you're preheating the cooling air! Think about it- it's counterproductive- you want the air as cool as possible as it enters the fan shroud so it can carry away the most heat (that's it's purpose). The hotter the air going in the shroud the less heat it takes out (and the hotter the engine gets). Get the proper factory cooler and put it on the engine- not only is it simpler (no hoses to mess with and leak) and more compact, with the pre-doghouse shroud the cooler is needed inside to keep air pressure (and temps) even from side to side. The cooler is needed to balance the side to side airflow in the earlier shroud- without it, temps will be substantially higher on 1 side. And if it has a doghouse shroud, same thing-
get the proper cooler and all the relevant sheetmetal installed. Remember that everything is engineered to work together. And the flat part goes in first with the cupped end against the spring.

Hope this helps. Al
_________________
On a lifelong mission to prove (much to my wife's dismay) that Immaturity is Forever!!
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Drewmon
Samba Member


Joined: February 22, 2016
Posts: 226
Location: Maine
Drewmon is offline 

PostPosted: Mon Apr 22, 2019 9:52 am    Post subject: Re: oil cooler holes blocked with set screws Reply with quote

beetlemania628 wrote:
What if I block the top with set screws as shown in the picture. Will there need to be additional work on the case to ensure the flow is ok? I thought a oil cooler block off would do the same thing. I am using a full flow to a filter system. This is for racing only.

https://www.thesamba.com/vw/gallery/pix/1060958.jpg


Did you ever figure this out? I have the same setup as you with the cooler ports plugged. I'm trying to figure out what to do with the plunger and spring on the pulley end of the engine.

Thank you
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Performance/Engines/Transmissions All times are Mountain Standard Time/Pacific Daylight Savings Time
Page: Previous  1, 2, 3, 4, 5, 6, 7, 8, 9
Page 9 of 9

 
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 © 1996-2020, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB