Well bad day! Went out and after about 2-3 hours the dozer blew the head gasket between 1&2 cylinders. I was watching my new cat gauges and yes specked for the d9g and it was running a little more then middle of the green. I stopped and saw I believe on the compression stroke a puff of air fluid come out... Right on the edge so that would be #1 cylinder. My pressure relief valve which is new never blew either... The only thing I can think of is to take valve cover off and re-torque head... I never did it before if you remember there was an oil leak at the rocker to head and I replaced those gaskets... I am bumbed but hopeful a re-torque and hopefully that seals her back off. I will check the oil in the morning..

Well went back and started her up and she started and is hissing at the left side of the block on #1 cylinder at the edge... Seems blown to me... Any suggestions? Should I tear into her and put a new head gasket and put her back together? What do you guys think... More fun with this old girl....

No water in the oil clean... No oil in the coolant as well, clean... Just hissing at #1... I have not re-torque but I plan on doing that. Should I loosen all bolts and then re-torque in the proper sequence or just do the sequence and re- torque?

You could try to retorque it but I doubt it will solve it. I'm thinking a low liner, drain coolant, remove the head, torque liners down one at a time and check the height. If they check within spec then maybe the head needs surfaced. I know, what a sinking feeling, but things happen when someone else doesn't check things like they should and throw it together and let the next guy[you] deal with it.

i agree with Rome 100%, remove the head and do a thorough investigation now!  hopefully you caught it early and it's still a relatively easy repair..

-it seems likely somebody missed something? not what a person expects to do but the short-cuts and missed steps always cost more time, energy, parts...($money$), in the end..

Since I have to go into the head.  Should I re-do the valves and all.  And in addition would you move the other head as well?  456 head?  What a PIA! This girl is not easy to say the least?  



 Can I move her or am I asking for more trouble?  She starts up and moves just need to get her across the street... If not I will do iti in place.... 

what about the new pressure relief valve? could it be the culprit?
 

It is brand new and the temp gauge was not even close to being in the red!!!! It was a little more than the middle of guage not close to red at all.... 

Hi, gvanhouten.
Sorry about your latest troubles, a real PITA. I'm no mechanic but I would say it would be safe to move it across the street.

Cylinder liner protrusions are very critical on those engines so that all cylinders get the same 'bite' in the head gasket. If you have to remove the front head, I would suggest doing both 'cos it is pretty likely that the same past mechanic did both heads. Also, it is another PITA to take off all the stuff to do one head and put it back on again, only to find that you have to do it all again to fix problems in the other head.

'Sides, if you do them both and one gives problems again in the future, you KNOW who to point the finger at.

LOL.

Just my 0.02.

Thanks Deas!!!!  Yes,  I rather point the finger at myself!   It reflecting the flywheel being off I should have known eventually something like this would have happened.... I was of course working on my neighbors property trying to help him out!  Of course no good deed goes unpunished... I will brush up on my skills of removing the heads.... Yes, I agree remove both and do it correctly!  Why I am in there I can have a look at the cylinders and the liners and the valves!  Oh, happy joy joy!!!!!