Spacers under oil cooler?

[Michael Fischer]

The customer said that his oil cooler was leaking. This is what I found.

According to the pic in manual there should only be one. Not two washers stacked on top of each other.

So here is my question plain and simple. What is the correct thickness for the spacer? I cannot find this information anywhere. Going buy the pic in the manual it looks like the same 6mm flat washer that goes under the mounting nuts on a Type-1 doghouse cooler. I don't want to have to fix this twice and I am lost. I am not a type-3 expert at all. Any help will be greatly appreciated. Thank you.

[Tram]

The main reason that cooler was leaking COULD be the farking blue silicone all over the seals.
Other than that- yes, there should only be one spacer per fastener. And, I'm not entirely sure those are the correct seals, either. Check Bentley... Seems to me that they should be green.
I would examine that cooler very closely for hairline fissures at the body of the cooler around the flow holes. Somebody doubled up on the spacers and installed the Blue Goo because they've had an ongoing problem with leaks, is what it's looking like to me.
And you are correct: they are the same spacer and seal as the doghouse cooler, which is why I'm thinking they need to be the green ones. The only difference between the doghouse cooler and the T3 cooler is that the doghouse cooler can't accomodate the T3 sending unit.
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[Michael Fischer]

[JSMskater]

im looking at my type three bently

heres what it has to say about the spacers

"if the larger, late type cooler is to be installed on an earlier crankcase or vice versa, use seal and spacer kit SP 111-198-029. it can be installed in one of two ways, as shown in figure 12-2. "

i cant tell what year the notch is from your picture, but id say it looks like an early model. if thats the case, check to see if the cooler you're using is early or late. then check to see if the seals you have are the adaptor kind or the regular kind. It maybe that the PO attempted to use old (regular) seals with his new oil cooler and added the silicone and spacers to adjust.

the reason i say this is becuase underneath the picture 12-2 the bently reads:

"Note- when you use the adapter seal, you MUST NOT FIT THE SPACERS that were shown in figure 12-1. discard the old seals and spacers and use only the GREEN seal from the adapter kit. ther other parts included in the kit are for use on other VW models."

my guess is that if you get the green adapter seals, you wont need to worry about the spacers at all. as long as you install the green adapter seals correctly according to the bently diagram, you should be set.


however if the cooler and case are both early or both late, then you would use the regular seals and spacers, which i assume are the ones you have there but ONLY one of them.

it cant be the washers that go under the nuts on the type one cooler becuase their inner diameter is too small to fit over the studs on the type 3 case.
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TOOB Member #3
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[Michael Fischer]

Ok now we are getting somewhere. I always wondered what this cooler seal kit was for. Unfortunately I don't own a type-3 bentley. Just a clymer manual. I think with the info you just gave me MR. Skater I can figure it out. Thank you very much.

[JSMskater]

ok now that u have those green spacers---

the bently diagram shows that early model cases had a smaller hole for the oil to pass through. therefore your green seals should have a small hole and a big hole. just match up the sizes, ignore the spacers (if the cooler you have is indeed a different sized hole than the case) and you should be set.

good luck
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TOOB Member #3
I make D-jet FI connectors

[Russ Wolfe]

Those green seal were used if you had a miss-matche between the case and the cooler. Early cases had an 8mm oil passage and late cases had a 10mm oil passage. Same for the coolers.
Small cooler/small case, use the orange seal that you show. With a 4mm thick washer. Big cooler/big case, use the same the same seals as the doghouse T-1 with no washers. Any of the other combinations use the green seal kit, with the washers that come in the kit.
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[JSMskater]

[Tram]

Well, boys, I've ALWAYS used the green seals WITH the washers, and never had a problem. When I was an apprentice, the tech master said that this was the "foolproof" way to do it.
And Mike, I am no T1 expert!!! I just automatically assumed that since the washers came in the kit, you used them. i have, and again, without problems. It was always my understanding that the spacers are necessary to keep the seals from choking down the flow.
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[JSMskater]

russ n tram have way more experience than me, so if they say roll with the spacers, screw the bently note and just roll with them and the green seals.

now i can pencil into my bently- use spacers!
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71 Squareback-FI -- 73 Bay (subaru powered)
TOOB Member #3
I make D-jet FI connectors