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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old June 12th, 2018, 13:47   #1
commanderjjones
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Join Date: Jul 2011
Location: Harriman, TN
Default oil cap leaking

Noticed when I changed my oil yesterday that I had a significantly amount that had leaked around the cap. Not overfilled and this is the first time I've seen it happen. Is the cap just worn out (the car does have 350k)? Doesn't seem to fit loosely, but I think it should seal enough for that to not be happening.
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Old June 12th, 2018, 14:59   #2
hey_allen
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You can buy just a seal and replace it, as the seals do harden and stop sealing well after some length of time.
I've purchased a couple over the years, usually from one of the forum vendors, as a small add-on item tossed in when I'm ordering other maintenance parts or supplies.
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Old June 12th, 2018, 15:05   #3
BobnOH
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Old June 13th, 2018, 03:58   #4
Dieselmonkey02
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Mine was leaky before, I just pulled the seal off and cleaned it real good and it’s been fine since.
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Old June 13th, 2018, 19:33   #5
KyleMillione
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I put 2 seals on mine to stop the leak. I think the metal tabs that hold the cap in get little bent after 200k, and putting the extra seal keeps it tight. I'm relatively sure I got it at AutoZone.
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Old June 13th, 2018, 21:04   #6
KrashDH
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I just bought one at Napa this afternoon for safe measures as well. Hope I don't need 2?! I'll buy a new cap if that's the case!
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Old June 14th, 2018, 05:25   #7
oilhammer
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My Golf always has some slight wetness around the cap... I've replaced the seal, replaced the cap, different valve cover at last t-belt change even... still does it. Not awful, not anything I am really concerned with... but after 540k miles, I guess if that is really the worst thing, then that's OK.
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Old June 14th, 2018, 11:02   #8
hey_allen
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I bought a steel oil cap at Oreilly's the last time I was looking for a seal, and it has a bit more tension on the spring that holds the cap down.

So far seems to be keeping mine dry, but it may loosen over time as well.


I had replaced the stock cap's gasket previously, and it worked for a while before it started to weep again.
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Old June 14th, 2018, 18:37   #9
KyleMillione
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Quote:
Originally Posted by KrashDH View Post
I just bought one at Napa this afternoon for safe measures as well. Hope I don't need 2?! I'll buy a new cap if that's the case!
I just added the new one with the old one. I'm relatively cheap and the seal was cheaper than the cap.
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