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Head Gasket

J

jimdog

Member
I'm getting the valves ground in my 826D 358 motor.With the stock compression ratio being 16-1,it makes for a motor that doesn't like to start in cold weather.By grinding the valves I'm lowering the C Ratio.I here that someone offers a thinner head gasket,Is this the best way to get the compression ratio back to stock or better?So far I have not found anyone that offers a thinner gasket.
Thanks for any help.
 
Had the same trouble recently on an Oliver/Waukesha diesel head. Correct fix was having all new intake and exhaust seats installed to get the valves back where they belong.
 
Unless the valves and seats are really bad, simply touching them up should have an almost negligible effect on compression, if they require a lot of grinding, have new seats installed and get new vales = back to original.

Also, does the head need to be resurfaced, a few thousandths there is like a thinner gasket.
 
There should be a specification for valve recession, I would check that and replace seats if not in spec.
 
Yes, there is a spec.on valve recession,and now they are within spec.before valve job.The exhaust is the only valve with a replaceable seat.My thinking is if they are not within spec after valve job a thinner head gasket would be the simplest fix. I have had some guys comment that they would mill the head only as a last resort.Not sure why.
Thanks for your reply.
 
I have no problem touching up the head surface until it is flat, but do not like to take more off than needed.

I would not worry about a few thousandths
 
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