One for the spark plug reading gurus

All technical questions and answers regarding starions, being modifications to maintenance.
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thrash
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One for the spark plug reading gurus

Post by thrash »

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?

Image
quest wrote:
WANTSOM wrote:Personally, I find sloppy boxes very unsatisfying. I like them tight and taught to the point that if you dont have to push to get it in then its probably too old and time to get a new one :P
don't try explaining that to her tho..... just leave. lol
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OLD FART
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Post by OLD FART »

Not a guru but no 3 seems to have too much fuel OR bad rings letting oil into the CC
I've had mine since 03 07 92
85 JB 2323cc DOHC 4G63
THE OLDER I GET THE FASTER I WAS
GROWING OLD IS MANDATORY GROWING UP IS OPTIONAL
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fugazi
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Post by fugazi »

Oil leaking from valvestem-seal on no:3
I'm no guru...
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Starion VR4
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Post by Starion VR4 »

Na... looks like the spark went out... broken lead? Is is COP ignition? :beer
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30PSI,2.4L! Wolf 3D Ver 4. VR4 Head.
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thrash
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Post by thrash »

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?
quest wrote:
WANTSOM wrote:Personally, I find sloppy boxes very unsatisfying. I like them tight and taught to the point that if you dont have to push to get it in then its probably too old and time to get a new one :P
don't try explaining that to her tho..... just leave. lol
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fugazi
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Post by fugazi »

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

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

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
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Now: Australian Compatible!
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Adriano
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Post by Adriano »

I woild pullthe rocker cover and check the valve heights,
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Starion VR4
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Post by Starion VR4 »

Burnt or bent valve... :beer
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30PSI,2.4L! Wolf 3D Ver 4. VR4 Head.
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thrash
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Post by thrash »

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
quest wrote:
WANTSOM wrote:Personally, I find sloppy boxes very unsatisfying. I like them tight and taught to the point that if you dont have to push to get it in then its probably too old and time to get a new one :P
don't try explaining that to her tho..... just leave. lol
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fugazi
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Post by fugazi »

Yes...
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redzone
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Post by redzone »

Burnt out exhaust valve!
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