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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old January 20th, 2012, 11:30   #1
nashbok
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Default ALH Oil Leak - Front of engine

I've got a pretty good oil leak coming from the oil filter housing area on my 2000 TDi Jetta (175k miles).

My guess is the oil filter housing gasket. The plan is to just replace all the seals/gasket on the housing. Is this a common problem? Anything else I should look for?

Thanks!
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Old January 20th, 2012, 11:31   #2
Dieselducky
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Check the oil filter cap to make sure it's not cracked
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Old January 20th, 2012, 11:37   #3
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I just had one like that on my 98 Beetle. It was the oil cooler under the filter housing. I just tightened the large nut on it and it is leak free.
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Old January 20th, 2012, 11:51   #4
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http://forums.tdiclub.com/showpost.p...2&postcount=51
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Old January 21st, 2012, 18:35   #5
nashbok
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Default Re:

thanks for the info all. Shagin' is right (and thanks for the write up BTW. there's tons of good info in here but the search feature on the forums is seriously lacking). After cleaning everything off and taking a good look it seems to be the oil cooler.

I assumed the filter housing gasket since the dealer told me if it was the oil cooler seal I'd have antifreeze in my oil -- which I don't.
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Old January 21st, 2012, 21:24   #6
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Oil cooler seal(s) keeps junction to oil filter stand from leaking.

To get coolant in oil, there would have to be an internal leak of the oil cooler.
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Old January 23rd, 2012, 04:01   #7
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I have a AFN front engine oil leak , which also appears near to the oil filter housing !!

I would be very interested in knowing your outcome, thankyou
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Old January 24th, 2012, 11:58   #8
nashbok
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There's a small leak at the top of the oil filter -- the o-ring doesn't fit very well -- bulges out a bit.

The main leak was coming from the top of the oil cooler. I tightened up the bolt 1/4 turn and that seems to have fixed it for now. I ordered the o-rings from idparts for six bucks (the dealer quoted $19) but haven't installed them.

The biggest issue was cleaning off the engine to locate the leak(s). I had let it go WAAAAY too long and the engine was a real mess.

Last edited by nashbok; January 24th, 2012 at 12:01.
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Old January 24th, 2012, 12:15   #9
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if you need something that cleans really well, use 50/50 simple green spray it down, then let it sit on there for about 20 minutes, then use brake cleaner to wash it off... rinse and repeat... you'd be surprised at the result!
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Old January 24th, 2012, 12:25   #10
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Quote:
Originally Posted by paramedick View Post
Oil cooler seal(s) keeps junction to oil filter stand from leaking.

To get coolant in oil, there would have to be an internal leak of the oil cooler.
Yes. It's sad that the dealer didn't understand this.
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Old November 5th, 2013, 16:08   #11
Mk4tdi02
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Looks like my mk4 alh is leaking from the same place. Anybody have those part numbers for those seals. thanks.
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Old November 5th, 2013, 19:40   #12
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038117070a
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Old November 6th, 2013, 04:07   #13
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There are two gaskets. The other one is the same number as above minus the "a". I just did mine and it was an easy job. Once I got the socket on the nut I realized it was just loose and the gaskets were fine- 182k. Changed them out anyway since I had them.
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Old November 6th, 2013, 08:19   #14
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Go to the dealer! Much cheaper from them than ordering online Unless you are ordering a whole bunch of stuff and have free shipping lol
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Old November 16th, 2013, 07:21   #15
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Thanks Gents! Will do these before it gets too cold.


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