Z22se Postmortem

Muncher

Muncher

Muncher

Soldato
Joined
17 Oct 2002
Posts
7,169
Location
Ipswich
A VX owning mate very kindly gave me his old engine after it went bang in spectacular fashion whilst in Europe so today I stripped it down to salvage a few bits from it and also to have a general play to see if I could work out what went wrong.

The 2 big holes in the block and one in the sump suggested it was quite serious :p

Having fully stripped it as far as I could tell it looks as though one of the conrods snapped, blowing a hole through the block. The piston only made very minor contact with the valves on one cylinder meaning the head is fine.

There was a lot of soot on the pistons which I guess suggests it was using a lot of oil? Everything else from what I could tell seemed fine, the timing chain was fine, the crank bearings didn't look that bad, it just looks as though the conrod snapped in two places...

http://www.muncher.org.uk/z22se_postmortem

There's 70 odd pics there so hopefully enough for the engine gurus to go on...

postmortem%20018.jpg
 
It's not a common problem on the z22se at all, hence why I was interested. Replacement costs can be about 4k including labour but there are quite a few we one hand engines about. It was being driven hard at the time but not on the ring, I think low oil was quite likely but why would that cause that specific failure?
 
Just had stumpy (some of you will remember him) look at the pics and he thinks it has just been over revved and thrown a rod.

Edited to add the car already has another second hand engine in it and is back on the road. I just saved this engine from going in the skip really.
 
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