Retorque head blt nuts

dawsonn · Feb 6, 2011

Does everyone retotque thier head bolts on a 135 diesel MF tractor. The book say to retorque after 50 hours. I rebuilt the motor and have about 40 hours on it, I just don't realy want to pull the tank,valve cover.injectors,fuel lines, rocker arms etc. The motor runs great, I retorqued them after firt real heat up. Just wondering what other tractor owners though. Charles...

NCWayne · Feb 7, 2011

Been building engines for alot of years for both myself and customers and have never retorqed the head bolts "like the book says" for the very reasons you state. The engineer that came up with that train of thought obviously never had to spend several hours removing all the other parts in the way to do the retorque once the engine was installed in the machine, or he'd have thought twice about it....

That said, I typically do them just like you say you did and retorque them after test running the engine on the stand long enough to get it good and hot. Like I said origionally, I've been doing it this way for alot of years, on quite a few brands, and have never had one come back or have any problems.

Anonymous-0 · Feb 7, 2011

I retorqued the head bolts after running mine up to temp. then at about 75 hours I developed an external leak so I retorqued the head bolts it seemed to work so far after another 25 hrs. Run it till you have 50 hrs and see if you have any leaks. By the way I have a MF 65 with indirect injection, so the mount point for the injector are the head bolts.You have to remove the injector to retorque those bolts. It still only took about 2 hours to complete the project and restart the tractor.

Retorque head blt nuts

dawsonn

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NCWayne

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Anonymous-0

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