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Discussion Starter · #1 ·
Due due the recent cold weather, the oil cooler o-ring on my 1997 Jetta has gone bad and has caused a nasty oil leak. The part is really cheap and I'm hoping that it's easy to replace. What's the most effective way to replace the oil cooler o-ring?? Thanks guys
 

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There is a write up out there. I was able to do it without disconnecting any hoses. IIRC, take the filter off, undo the large nut at the top of the threaded tube the filter screws on to with a deep well socket (27mm). Push the cooler down off the tube. Get all of the old ring off. Put the new one on and put it back together. Be careful with the hoses, though. Take a couple of pictures for the next guy, huh?
 

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Re: (FL 2.0L)

Just be really careful not to crack the plastic thermostat housing while prying the oil cooler down off the center threaded tube. If the engine is really cool then maybe let her idle for 30 seconds or so just to take the chill out of the water & soften plastics & hoses a little.
If I remember correctly, someone was able to remove the center threaded tube after removing the nut. With that done you don't have to pry down the cooler block to access the o-ring.
I did it without without removing cooling hoses.
 

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Discussion Starter · #4 ·
Re: (bearing01)

ok guys. thanks for your advice. the new o-ring i ordered finally came in and i began working on replacing the old one. i removed the big nut below on the thread to which the oil filter screws on to. I started to slide the oil filter housing down on the thread and noticed that the oil cooler o-ring was brittle and broken into 3 pieces. No surprises that it's no good. Because it was broken, it was easy to remove from the housing without having to slide down the filter housing off of the thread. I spent about an hour trying to slide the oil filter housing down off the thread, but I could not get it off completely and I felt that I was really beginning to stretch the 2 hoses that are connected to it. I realized that maybe the whole process would be a lot easier if I removed the hoses (or at least the top hose) so that the housing would slide down easier. I don't know if it is because I'm an idiot or just not focused, but I can't get the clamp off. It appears to be a squeeze clamp and I spent a long time with some pliers trying to squeeze it off, but I am still unsuccessful. Is there a tool or a better technique to get that clamp off? I'm feel like I'm really screwed unless I can get that hose off. Thanks fellas
 

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Re: (FL 2.0L)

You need to unscrew the threaded tube with a vise-grip. This will allow you to get the O-ring out without fighting the coolant. hoses. Lock it right on the threads. It's not in too tight. If your already past this point and taking off hoses use small needle nose vise grips and get the hoses back on and start over with taking the threaded tube out. Eventually fighting hoses you will lose and it will cost you.
 

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Discussion Starter · #8 ·
Re: (Pizzadub)

I'm going to give the hose clamp pliers a try. Looks they should work just fine (sucks they're $30, but I think it's a good investment).
 

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Re: (LedZeppelin11871)

The hose clamps don't make it much easier, cause getting the clamps off is alot easier than putting them back. I really had to fight when I replaced my cooler. And I just did the seal for someone, slide the cooler down enough to get some pliers/vice grips between the cooler and mount and remove the tube, then you don't damage any threads that you need. http://****************.com/smile/emthup.gif With the tube out, things go WAY easier.
 

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Discussion Starter · #11 ·
Re: (Pizzadub)

so what you're telling me is that I don't have to take the cooler off...all I have to do is pull the cooler down enough so that I can take the tube off with pliers without having to removing the unit? seems too easy. is the tube screwed onto anything??
 

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Discussion Starter · #13 ·
Re: (ps2375)

is it as simple as pulling the tube down or is the tube (flange) screwed into the top of the unit that sticks out from the engine block???
 

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Re: (LedZeppelin11871)

its screwed into the oil filter flange.
 

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Re: replacing oil cooler o-ring (LedZeppelin11871)

I got the same leak when it got cold. I also got my oil cooler off without removing the hoses.

Top view before removal.

Bottom view before removal, without oil filter.

Top view after removal.

I haven't got the new o-ring yet, but it should be a breeze to install.

Modified by BGKYJettaOwner at 1:02 PM 1-6-2008


Modified by BGKYJettaOwner at 1:06 PM 1-6-2008
 

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why fight the hoses anyway, drain the coolant down a bit and take the hoses off and get to the o ring, and you might as well take a look at the coolant inlet and outlet fittings as well, mine were pitting from corrosion and were about to spring a major leak, but some JB Weld solved that.
 

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Actually it's pretty easy once the tube is removed had to replace my oil cooler o-ring last week. Took me three hours, a few trips to the auto parts store and alot of $*@* ing. Hate useing vise grips but that's what I ended up doing.
 

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Re: replacing oil cooler o-ring (BGKYJettaOwner)

idk what kind of 2 liter you have but mine has a much different hose set up than that.
Much more of a hassle to get to, and they will not twist up and away while still being attached to the cooler.
Anyway I tried to get the oil filter union off and all i did was gall the threads.
Now what?
Also what kind of vice grips are you ablr to get into that small of an area?
Im gonna try to get a bigger pair of vice grips on the union and see if they will fit upp in there.
Most likely have to order a new union from vw 25 bucks.
Cheaper than cutting (2) 40 dollar hoses that I wont be able to put the new ones back on anyway.
 

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Re: (ps2375)

Right on the money.
Quote, originally posted by ps2375 »
The hose clamps don't make it much easier, cause getting the clamps off is alot easier than putting them back. I really had to fight when I replaced my cooler. And I just did the seal for someone, slide the cooler down enough to get some pliers/vice grips between the cooler and mount and remove the tube, then you don't damage any threads that you need. http://****************.com/smile/emthup.gif With the tube out, things go WAY easier.
http://****************.com/smile/emthup.gif
 

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Re: replacing oil cooler o-ring (LedZeppelin11871)

Ok I Had to do the same replace oil cooler Oring, I am just wondering if I have the correct Oring or it is a universal one they use now The one I picked up has 2 ea small tabs with holes part # 038117070A , It look the same size , but dealer is closed and want to know if this is the right one to use. The one I took of was just round.
 
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