head gasket ?

[coppersmythe]

Hello from the beat up deep south . quick question . changed the head gasket on my 65' loboy . ran it a little bit . do i re-torque "hot"(warm) or cold ?? coppersmythe..................................

[Glen]

Hi,
Retorque the head bolts when the engine is cold, they have said on here before.

Below is a page from the 1965 Cub and LoBoy operator's manual telling the number of hours of use that IH said to go before retorquing the head bolts for a new tractor, I would think when you remove the head and put it on again, it would be about the same number of hours of use before retorquing the bolts.
It says 50 hours of use.

http://farmallcub.com/rudi_cub/www.clea ... age-71.jpg

[coppersmythe]

Hi,
Retorque the head bolts when the engine is cold, they have said on here before.

Below is a page from the 1965 Cub and LoBoy operator's manual telling the number of hours of use that IH said to go before retorquing the head bolts for a new tractor, I would think when you remove the head and put it on again, it would be about the same number of hours of use before retorquing the bolts.
It says 50 hours of use.

http://farmallcub.com/rudi_cub/www.clea ... age-71.jpg

Thanks glen , i have received info from well known rebuilders that recommend retorqueing hot (warm) . i will study and go from there . thanks for your input .............coppersmythe............................

[Stanton]

Hi,
Retorque the head bolts when the engine is cold, they have said on here before.

Below is a page from the 1965 Cub and LoBoy operator's manual telling the number of hours of use that IH said to go before retorquing the head bolts for a new tractor, I would think when you remove the head and put it on again, it would be about the same number of hours of use before retorquing the bolts.
It says 50 hours of use.

http://farmallcub.com/rudi_cub/www.clea ... age-71.jpg

Thanks glen , i have received info from well known rebuilders that recommend retorqueing hot (warm) . i will study and go from there . thanks for your input .............coppersmythe............................

Interesting. From a layman’s perspective, the bolts and surrounding block in a warm engine would be expanded, versus a “cold” engine. I would assume you could torque the bolts down tighter when cold.

Unless there’s good evidence to the contrary, would think the IH manual would be correct.

[coppersmythe]

'76 ford 302 . I would say a pretty common engine . the timing chain ate up the camshaft gear and jumped timing . i had about a 50/50 split of opinion from multiple repair shops , half said non interference , no way the valves are bent , half said absolutely , valves are "bent" . one said " it depends " . the motor did have quite a few miles on it , so i ended up buying a crate motor and installed it myself . coppersmythe.......................................................

[Clemsonfor]

'76 ford 302 . I would say a pretty common engine . the timing chain ate up the camshaft gear and jumped timing . i had about a 50/50 split of opinion from multiple repair shops , half said non interference , no way the valves are bent , half said absolutely , valves are "bent" . one said " it depends " . the motor did have quite a few miles on it , so i ended up buying a crate motor and installed it myself . coppersmythe.......................................................

What??? Hahaha
What does this have to do with torquing the head hot or cold?

[coppersmythe]

'76 ford 302 . I would say a pretty common engine . the timing chain ate up the camshaft gear and jumped timing . i had about a 50/50 split of opinion from multiple repair shops , half said non interference , no way the valves are bent , half said absolutely , valves are "bent" . one said " it depends " . the motor did have quite a few miles on it , so i ended up buying a crate motor and installed it myself . coppersmythe.......................................................

What??? Hahaha
What does this have to do with torquing the head hot or cold?

just an example of differences of opinion . a 76 ford 302 , how many hundreds of thousand have been rebuilt over the years , and still disagreement . coppersmythe.................

[Clemsonfor]

'76 ford 302 . I would say a pretty common engine . the timing chain ate up the camshaft gear and jumped timing . i had about a 50/50 split of opinion from multiple repair shops , half said non interference , no way the valves are bent , half said absolutely , valves are "bent" . one said " it depends " . the motor did have quite a few miles on it , so i ended up buying a crate motor and installed it myself . coppersmythe.......................................................

What??? Hahaha
What does this have to do with torquing the head hot or cold?

just an example of differences of opinion . a 76 ford 302 , how many hundreds of thousand have been rebuilt over the years , and still disagreement . coppersmythe.................

These things are not also absolutes. I did a timing belt on my 4.7l V8 Toyota last year. I changed it at TDC, I didn't roll it a few degrees to the service marks to take the tension off the cams and springs. I had a cam flop as I was lining the belt up. This is an interface engine. Reading the internet I feared I had ruined that head. Some folks said when it flops it ruins the valves that would hit. Others said nothing happens. Luckily I was the latter. But now I know ones I am in TDC to roll the engine a few degrees till the service marks all line up and to do the change in the service position so that the tension is off the cams. There is a lot of stored energy in those compressed valve springs.

That said I'll say this ...Toyota power. Love a Toyota.