Oil leak lower front, turbo related? Anything else to check while doing timing belt

[evilhomer]

New to me 02 A4, 1.8t, 130k. Service history somewhat unknown, so before I drive it I'll be doing the timing belt. I decided to do the tear down before I order my timing belt kit to see if there's any extra seals I need. Everything I'm seeing actually looks pretty good so far. I thought I'd do the valve cover gasket set as a while you're at it type item but everything looks nice enough to me I don't think I want to mess with it. The only dirty spot I can find on the motor is on the lower front, near the turbo. I've looked through every diagram I could find and am not sure what that part even is. It's tied in to the many hoses associated with the turbo but I'm not sure what it does. I've looked in both an 02 Audi and Passat Bentley but no luck.

So any help on what the oil source is and what to do about it? I'll also post some pictures of the valve cover/cam seal area to see what you think. Crank seal area is nice and dry. Any other things I should take care of while I've got it all taken apart? I've decided to also do the thermostat housing while I've got the front taken off since it should only take a couple minutes to pull the alternator now.

[jacobsen]

Replace all the seals now while you can. Especially the front crank seal. That part you're talking about is a resonator it makes up for the fact that it's single intercooler whereas in Europe it's double intercooler.

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[ECS Tuning-Audi]

When you do the timing belt service I would also suggest you do your cam and crank seals since youre working on the front of the vehicle anyways.

We have complete kits that include seals, see the link below.

Click HERE to order or for more information


Let me know if you have any questions.

Jason

[K04-B6]

The first picture above look like your boost reservoir. Check to see if that hose leading to it is cracked or if the clamp is still sealing the hose onto the reservoir. It just looks like a bit of blow by to me.

[evilhomer]

Thanks, with yours and jacobsens replys I found the part number for it. Looks like it's just a simple aluminum block with one line in, nothing out. I just cleaned the hose off and it looks pretty good underneath. So not sure where the leak would be from unless there's a tiny hole in the hose I can't see. This other hose to left is a bit more concerning with a gouge in it so I'll replace that.

As far as the crank seal. As of right now it's pretty dry. So far my compressor won't crack the bolt at 100psi, I could always try 110 with some heat.

[K04-B6]

Sorry man I can't find the part name or number for the life of me. Maybe if you make a trip to dealer to see if they can pull up the part number and then you can search online with that number and find it for cheaper

[jacobsen]

You'll need a tool to keep the crankshaft in place as you remove the bolt and reinstall the bolt otherwise you'll put the motor off time. If it's too much work for you you can skip it come up but I wouldn't.

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[evilhomer]

I figured out some, while you're at it type items. If you've gone as far as removing everything to do both belts, takes about 5 minutes more to pull the alternator to get to the thermostat housing. Pull the thermostat housing and you'll be staring at your broken dipstick tube.

Behind the broken dipstick tube I found the tube that comes out of the oil filter housing had a split in it. Anyone have a part number for that one, maybe 06A103213F? I'm trying to find that tube and the one that comes out of the valve pictured above. I'm not longer worried about the tube coming out of the resonator, looks like it's probably fine.

I decided to leave the crank seal in place but I got the valve cover kit and cam seals. I'm considering replacing the plastic water inlet on the back of the head while I've got the cover off since it's pretty easy to get to right now.

[gtsingh91]

I figured out some, while you're at it type items. If you've gone as far as removing everything to do both belts, takes about 5 minutes more to pull the alternator to get to the thermostat housing. Pull the thermostat housing and you'll be staring at your broken dipstick tube.

Behind the broken dipstick tube I found the tube that comes out of the oil filter housing had a split in it. Anyone have a part number for that one, maybe 06A103213F? I'm trying to find that tube and the one that comes out of the valve pictured above. I'm not longer worried about the tube coming out of the resonator, looks like it's probably fine.

I decided to leave the crank seal in place but I got the valve cover kit and cam seals. I'm considering replacing the plastic water inlet on the back of the head while I've got the cover off since it's pretty easy to get to right now.

The tube near your oil filter housing sounds like the crankcase breather tube and PCV valve. Common leak issue with these 1.8 motors.