36hp warm up ring thermostat spring..

[jimbocameron]

The method below. Point no 3 suggests setting the ring 0.79 inches from shroud. (55 oval)

My question is; should this be 0.79 inches from the inner edge/part of the ring i.e closest to the back of the fan shroud OR should it be measured from the outer edge of the ring.

The reason I ask is that There is not much play behind the fan shorud due to the firewall, causing the ring to foul on it.

Method of regulation cooling air volume by means of engine temperture controlled fan ring.
1. release throttle ring operating lever.
2. allow enging to warm up until upper end of thermosate touches upper stop of the support (at normal outside temperture )
3. adjust throttle ring so that it opens at 0.79 in.
4. tighten operating lever.

[my59]

I set mine up measuring from the lip on the shroud to the edge closest to the firewall. A lot of the ring stays inside the fan opening
The rubber bumper plug on the ring goes in with the flat side toward the shroud.
You have to adjust the ring 'just so' or it'll make a hell of a racket when the Tstat contracts and pulls the ring in to the fan opening.
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my59: Well son, my grandfather died before I got to drive it, so does that answer your question?
our79: sunroof bus w/camper interior and 2.0 FI
Other:'12 Jetta, '77 Benz 300D, and a 74 MG Midget.

[808OvalGreasemonkey]

I used a electric heat gun and simply heated the thermostat until itexpanded fully (takes about 2-4 minutes) and then just measured from the uppermost edge of the housing to the ring upper edge 20mm and it works perfectly.Remember 20mm,even of it is 19mm or 21 mm or 22mm it is not a HUGE deal,just get it as close to 20mm as you can..

[Snort]

Scan from the 36hp Bentley Manual. 40hp manual shows the dimension as 25-30mm. Hmmmm.

[jimbocameron]

massive thank you to all that replied.

cheers

j

[Schwing]

I'm missing the rubber stop that goes on the warming ring. There is a hole in the ring where it goes about 0.277". I've hard that without this stop it could be noisy when the engine is cold.

I don't mean to hi-jack this thread but I thought this was kind of related. Do you or anyone else have this rubber stop? Is it important? If so where can I get one?
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Shadetree Westy
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Single Cab - BBXXVII Long Distance Winner
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[3foldfolly]

[EverettB]

Post a wanted ad because there is someone out there with a crap load of them.

At one point I had an NOS bag of 50 and sold them all. I know someone else on here had 50 too but his are gone as well. There is someone out there with more bags of 50.
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[808OvalGreasemonkey]

I made one out of a rubber AC compressor plug. Just look for a rubber plug at your local hardware store,they have little plugs with a groove in them used for buffers in automotive and household applications.I can send you one if you want/can't find one. It is very easy to improvise this part.

[EverettB]

Ace Hardware does have some very similar plugs.
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[my59]

I'm pretty sure I'm using one of the rubber stops that fits in the rear apron under the decklid. They are about the same.
_________________
my59: Well son, my grandfather died before I got to drive it, so does that answer your question?
our79: sunroof bus w/camper interior and 2.0 FI
Other:'12 Jetta, '77 Benz 300D, and a 74 MG Midget.

[hazetguy]

NOS

and not the same as a rear apron plug.

allowing the ring to move too far forward will case it to hit the fan.
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hazetguy: invested?
thebucket: Yeah Haze, its where people put money into a company in hopes of a return on their money

[Schwing]

For sale or are you just flaunting the stash? Or is that just a pic you grabbed from the gallery?
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Shadetree Westy
http://www.thesamba.com/vw/forum/viewtopic.php?t=657279&highlight=

Single Cab - BBXXVII Long Distance Winner
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[Snort]

[Schwing]

[EverettB]

[jimbocameron]

does anyone know if the spring attached to the thermostat ring rod, should be set to push the ring out or hold it into the fan shroud.

mine at the moment is set to push the thermostat ring away from the fan shroud. Is this wrong??

[Snort]

It pushes the ring away from the fan shroud. Thermostat, stronger than the spring, pulls it toward the fan shroud. If the thermostat fails, it relaxes and the spring pulls it away from the shroud thereby preventing overheating.

[Eric&Barb]

Doing a little research Tried the "Plug-Throttle Ring" VW part number as "VW 111119189" in a WWW search and found this:

New 12mm x 7mm Rubber Bumper for 84-93 Cabrio (Exhaust), 80-87 Audi 4000 (Trunk), 78-83 Audi 5000 (Trunk), 82-87 Audi Quattro (Trunk and Lock Actuator).

Part Number: 823253149 111119189 811827589 855827589
Weight: 0.2
Price: $3.00
Short Product Description:

823253149 Rubber Bumper

The above from this web site:

https://www.hansautoparts.com/823253149RubberBumper.aspx

So looks like VW used this same part in later decades.
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[Snort]

That thick style rubber bumper was a 40hp change. The 36hp bumper is more or less flat just as is mentioned above like the hole plug for a rear apron. If you look carefully at the service manual image I posted you can just make it out.

I've used both flat and thick. The thick one seems to give you better airflow when cold to help with defroster but it also puts a lot more strain on the cold and closed thermostat bellows and probably not so good for our already weakly designed 36hp thermostat brackets. But then I tend to worry unnecessarily about these little kinds of details.

My 1960 parts manual scan lists it as "N 20 002 1 Plug". Just out of curiosity I looked in the manual and sure enough the rear apron plug has the same part number.