Austarion

I'm interested to know what the spark plug gurus think of the plugs in the picture below.. they are not off a turbo car. What can you tell about what's happening in this engine?

Not a guru but no 3 seems to have too much fuel OR bad rings letting oil into the CC

Oil leaking from valvestem-seal on no:3
I'm no guru...

Na... looks like the spark went out... broken lead? Is is COP ignition? :beer

thanks guys

engine is a standard 4g61.. no COP..

I have a spare set of leads, so I can replace the lead.. but even if that's part of the problem, it's not the whole problem.

Another piece to the puzzle.. dry compression on cylinders.. 178, ZERO, 175, 189 (that spark plug is number 2 cylinder)

popped a little engine oil down the hole and comp still shows as nil..

further thoughts from this additional information?

"Ther's a hole in the bucket, dear Liza..."

Then... bad rings, bent/kracked/burnt valve(-s) or fu**ed piston.

If oil didn't help the compression, its likely a problem with the valves/head or gasket.

P.S. your number 4, top of the pic, is running just right lol.

-Robert

I woild pullthe rocker cover and check the valve heights,

Burnt or bent valve... :beer

Thanks everyone! Much appreciated.

Given that I'm still working towards getting my Starion back on the road, I think this will have to run as a 1200cc 3 banger for the time being. Am I doing it more damage by driving it around on 3 cylinders? There have been no overheating or oil issues so far

Yes...

Burnt out exhaust valve!