Cylinder 1 Zero Compression!!

[Voltguy]

Hi all, I have made the purchase of Palettes RS6. So far so good, if I could keep it out of the shop. Had a CEL on Friday afternoon after it was in for simple things. Oil change,headlamp washer repair, headlamp retaining ring and temp sending unit. Started it up and CEL flashing, immediately asked tech to VAG and it was miss firing. Tech took it for a ride and it cleared itself. Ran fine all weekend. Monday morn same symptoms, had it flatbedded to shop. So cute worlds fastest family sedan on the back of a CAA truck!! Now the shop is telling me that there is no compression on cylinder 1. Any ideas?? Thanks

[na1mt]

......sounds like this is gonna hurt. No,meaning zero, or just low compression?

[Voltguy]

Tech was going to pull valve cover this afternoon and keep me informed. I am REALLY hoping the third party warranty will cover this issue. Will post updates as they arrive. Thanks

[kismetcapitan]

interesting, hearing of engine damage on these cars is few and far between. What mods have you done?

[Brav]

well if its ZERO its probably a valve issue.. I'm no mechanic, but may indicate some valve/head work, but block could be ok. don't panic yet until you get some firm info back..

[4everRS]

Broken spring? That would be noisy though.

[speedtrapped]

He did have tuned IIRC, and I think meth?

[tightgroup]

zero comp has to be valve train related

[ben916]

I haven't heard of anyone having this issue...

Please keep the forum informed of this...

[ben916]

He did have tuned IIRC, and I think meth?

um, yes.... 3.9... remember? PBOX?

[speedtrapped]

yes Ben, I do remember...actually I think he was sharing that he hit 3.7 on Vbox, EPL tuned...but before Mike cuts my tongue out, I am in no way suggesting EPL's tune caused this....But I do know he hammered car, to get 3.7, is to hammer.

[bakes]

yes Ben, I do remember...actually I think he was sharing that he hit 3.7 on Vbox, EPL tuned...but before Mike cuts my tongue out, I am in no way suggesting EPL's tune caused this....But I do know he hammered car, to get 3.7, is to hammer.

I also believe that after he hammered it to get the 3.7 he had to get a bunch of transmission work done! I considered his car but went with Headshot's as he seemed to take it easier on his.

[hahnmgh63]

I wouldn't even turn the engine over without a video borescope of the cylinder first, not just a valvetrain inspection. I have a new video borescope and it's unbelieveable the detail you can see of the inside of a cylinder, and the good ones come with a mirror attachment so you can see the complete valvetrain. When my engine was out I inspected all 8 cylinders for a piece of mind.

[Voltguy]

Thank you everyone for info and tips. Waiting for tech to call this afternoon with more info. Will share if I don't hit the floor first.

[Bigglezworth]

Could be a blown head gasket too.

[aussie rs6]

my money is on a cracked head. Mooch I believe had a cracked head and his engine was worked harder than most with its tune.

But hopefully something less expensive like a blown head gasket.

[kismetcapitan]

zero comp has to be valve train related

not necessarily; I once melted the piston rings on all six cylinders in my Skyline, and there was zero compression across the board. That was expensive

But if compression is normal in the other seven cylinders, it could be something like a valve issue. Loss of the seal from the rings is easy to see - lots of smoke from the burned oil in the exhaust!

[Bigglezworth]

Thinking more about this, it's highly unlikely a head gasket blew out the side. They usually blow across the thin points (i.e. adjacent cylinder, oil passage, coolant passage). Any of those three conditions would provide different compression results than the zero you are getting. As stated earlier in the post, it is highly probable valve related - likely burnt valves. Worse case - and I mean worse case, it's piston related. Either way, it will require pulling the head which on this car is easier when you pull the entire powerplant. I'm sorry to hear about this as it would be the first time I've heard of one of these engines having internal mechanical damage. Lots of people have aggressive tunes and are without problem.