My Engine No Compression
Posted 01 September 2007 - 08:32 PM
We checked the valve clearences ..with valve number 8 open we checked number 1 clearence as to the book and so on all correct.
So am I thinking correctly that the head gasket has gone or worse the head has a crack in it.
The head is a 12G295 Cooper head with 'S' valves fitted which are bigger than the other valves on another 12g295 head we have.
We are going to take the head off in the next few days,but if its cracked will I see it or will I have to have it tested ?
Posted 01 September 2007 - 08:51 PM
Posted 02 September 2007 - 05:34 PM
piston could of picked up.
Keep thinking about what you are saying.
What are you saying????
Posted 02 September 2007 - 08:12 PM
Posted 02 September 2007 - 08:15 PM
If one cylinder was low then it could be a piston, it's really unlikely that two have gone. Most likely is the head gasket between cylinders. Sure you numbered the cylinders from the right end? It's more common to fail between #3 & #4. It is an old head though and so could be cracked, only way to find out is to lift it and see. All 295s are getting on a bit now. This one is normally a really obvious gasket failure when you eventually get to the gasket, like a dirty great hole in it so it should be easy to spot.
I`ve always found they fail between 2 & 3!
Edited by mini_kel, 02 September 2007 - 08:15 PM.
Posted 02 September 2007 - 08:22 PM
Bad news though, as my other half, while torqueing the head down snapped a stud. The air was very blue for a while and I heard lots of fence kicking which helped him calm down.
So it looks like I maybe getting a 1275 soon......not that I am complaining of course
Posted 02 September 2007 - 10:22 PM
think he means packed up, sprocket
Ah well fair enough.
"The piston has picked up" normaly describes the following - the piston has picked up some metal swarf and scored the bores
Edited by Mini Sprocket, 02 September 2007 - 10:23 PM.
Posted 03 September 2007 - 05:24 PM
Fantastic forum very helpful I will be back again I expect.
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