Cris

Ok... the shop came back to tell me the lifters for cylinder 1 are bad. They haven't had a chance to look for the cause yet, but I figured I'd throw this out to AW and see how much more damage I could be facing for my 1.8T engine.

thanks,
Cris

JWG

If you have a chip that eliminates or raises the RPM limit and exceeded the OEM Redline. You could easily kill your lifters. You can get lighter, high-performance lifters that will allow you to rev to 7000+ RPM.

Alternatively, you could have an oil pressure problem. No oil in and around the lifters, and you can expect them to die.

By the way, if the lifters had problems, you should have heard a problem. How did your mechanic determine the lifters failed?

Audi2ptzero

The 1.8t can rev much higher then 7K on the stock parts. The bad thing is if you rev the car without any load or while out of gear you can go right past the rev limiters.

A400

Stock lifters good to 8100 rpm! where did you get the 7000rpm info?

Cris

here is the full story - my turbo (K04) went out during a track session at one of the DEs - never went into redline. Basically, the boost gauge showed some erratic boost readings @ WOT (peaking only to 5psi or 10psi or normal 15psi) before it went poof in the middle of a straight (0 psi). After pulling into the paddock, I noticed oil leak from the turbo itself - a drip every few seconds while the engine is running. That was all well and good. When I try to drive the car home (thinking I could just drive the car home in NA "mode"), the engine hesitated (possibly misfired?) about 1/2 mile from the track, CEL and went rough idle for a few seconds. Then the engine started making lifter noise and shakes abit - but not before the hesitation/misfire. The car never stalled or died. It kept running. There was no telltale sign of smoke or burning smell from the engine bay - when the turbo gave or later when the car hesitated.

Does it sounds like there could be a blockage in the oil line?

Car has 91k miles on it. The K04 has/had 76k miles. The oil leak was determined to be a bad washer on the oil to turbo line - failed over time?

Thoughts?

Thanks!

Audi2ptzero

Which equals bad things.

PanTTher

then most likely your cams and lifters were starved of oil and that's probably why your lifter wore out.

Cris

the leak was specific to the turbo... and the dipstick still shows "full" in the oil pan after the ticking started. So, it's not the lack of oil in the system, but perhaps the feed to the lifters? Maybe lost of pressure somewhere?

I dunno how the oil circulation works on the engine. Someone told me oil to the 1.8T engine and the turbo are fed off 2 independent lines.

PanTTher

pressure and circulation to the rest of the parts should drop. At least this is what makes sense to me but there might be other reasons involved in your case. I doubt that oil pathways in your engine block are clogged. You might want to ask your mechanic if it's wise to change your oil pump and chain just in case it is part of the problem.

Mat Indukts Lambos

Bingo. Cookie for PanTTher. What he said.