compression Test Results

[FuddyMucker]

No it didn't disintegrate, it luckily got blown out the exhaust manifold into the cat.
If it had fallen back in to the piston it could have destroyed the engine beyond economical repair

[FuddyMucker]

OK, just spoken to a Isuzu mechanic at the Isuzu main dealer for Exeter and he has checked on his system and can confirm that they are not stretch bolts on the 3.2.
In his dealer manual (which he won't let me have a copy of ) it says to inspect the bolts for signs of wear and replace if necessary. He also said that they have only ever done a hand full of 3.2 head gaskets but can't remember ever needing to replace the head bolts on any of them.

I'm guessing they only needed to move over to stretch bolts when they increased the engine size from 3.2 to 3.5

If I do need any he can order some in and post them out to me at £7.59 + vat each!

[FuddyMucker]

Picked up my new valve earlier (from a Frontera 3.2 V6) and Yes it is the same.



While I was in there I also asked them if they have a listing for headbolts?
They said they had nothing listed because they are not stretch bolts, I asked him how he could be so sure? and he showed me this..



Now I will be 100% happy to reuse the headbolts

[VX KAT]

Yer killin' me here...cuz I don't understand this stuff & I'm curious....what's a stretch bolt and why shouldn't you re-use the bolts? Already stressed? Is all that black carbon/soot "normal" or should those 1st pics posted be much cleaner?
OK, I could look this up on the intent but you all are more fun...

Newthings....My background is kinda similar to yours in failure analysis, except my expertise was in healthcare...investigating when medical things fail or go wrong....surgery, medications, instruments, human error....etc... so I'm like the National Enquirer.."Inquiring minds want to know".

And Fuddy can you trust that book? My mechanic has a reference book that says our 3.5 engine IS an interference engine...when the pros here says it is NOT.