Hi, I have a tractor with a D1462-D1 engine. Been having trouble with head gaskets.
A while ago the gasket failed between cylinders. Got that fixed, or so I thought. 16 hrs later it starts blowing compression into the water jacket. Pulled the head a 2nd time. Looked like evidence of compression bypassing the gasket.
Got the head checked. Machine shop said it wasn't flat and they machined it.
Notably when undid the head bolts some if them where a lot easier to undo than they should have been. Not sure if they have stretched or if it's because the head was warped after the first head gasket replacement.
Worth getting new head bolts??? They are super expensive. AU$500 for the head bolts and gasket.
I'm pressure testing the block and it seems OK.
When I install the head bolts how many torque stages should I use? Should they be retorqued after some engine run time?
A while ago the gasket failed between cylinders. Got that fixed, or so I thought. 16 hrs later it starts blowing compression into the water jacket. Pulled the head a 2nd time. Looked like evidence of compression bypassing the gasket.
Got the head checked. Machine shop said it wasn't flat and they machined it.
Notably when undid the head bolts some if them where a lot easier to undo than they should have been. Not sure if they have stretched or if it's because the head was warped after the first head gasket replacement.
Worth getting new head bolts??? They are super expensive. AU$500 for the head bolts and gasket.
I'm pressure testing the block and it seems OK.
When I install the head bolts how many torque stages should I use? Should they be retorqued after some engine run time?