Alright sooooooo I am trying to help a fellow evo owner out its an 04 VIII with a 35r, stock block, built head etc...

2nd time within 2 weeks # 4 has fouled tryed bpr8es and br8eg race plugs

here are a few pics, looks like something is closing the gap on the plug.. maybe the piston? I dunno throw out any opinions guys

compression 155 155 155 130

 

Do a compression check. Looks like a valve or something broke and is inside that cylinder. The gap has been closed by something.

Chris

 

sorry forgot to post that up

it was 155 155 155 130

 

that sparkplug is damaged... something hit it.

n

 

physical damage

 

So something is down in the cylinder? No smoking car runs fine until the plug gets fouled of course, coolant is not disappearing, etc.. Maybe I need to pull the head and see wtf is going on

 

yea it looks like something hit it....i would take off the head and check it out

 

anybody know what the cause may have been?

 

i heard of someone having a similar problem. his piston was coming apart, ring land chunks due to heavy detonation from new mods & old tune!

same thing, gap was closing by itself.....well....not really by itself!

 

If you take a look at the plug its smashed in bad. I just went and checked the piston I took the damn plug out. Nothing that I can see on top of the piston, stuck a magnet down in there and nothing came out just some metal shavings. My question is what would case the piston to come up higher than normal???

 

pull the head and take a look better safe then sorry

 

Anytime a plug is self gapped while it's in the cylinder, you need to stop running the car and pull the head.

 

That's never a good thing!

If you have access to a bore-o-scope you can try that out to see any large material still in the combustion chamber but regardless of that the head should still come off and be thouroughly inspected same as the piston etc.

 

Same thing happened to a friend years ago. Piston started coming apart at the top ring land. The chunks were closing the gap on the spark plug. DO NOT START THE ENGINE OR TURN IT OVER ANYMORE!

You need to pull the cylinder head off and see what the damage is. Im sorry to be the one to tell you but its pretty obvious something broke most likely the piston or valve. But if the valve had broke you would see more of a compression loss so my guess is pieces of the piston.

The piston is not coming up higher then it is supposed to its just the chunks sitting on top of the piston that is closing the gap that normally is there. I hope things work out and please keep us updated. If you need any help PM me and we can talk.

Chris