head torque.

[31chevy]

Hi, is it best to retourque with engine cold or hot. I have 21 bolt 37 block 34 heads. Thank you.
Gary.

 

[Henry/Kokomo]

Cold, when heads are at their "thinnest". Re-torque (cold) after the first heat/cold cycle of operation. May be necessary to re-torque 2 or 3 times. Good luck.

 

[31chevy]

Thank you Henry.
Gary

 

[Karl Wolf]

When you retorque, undo the nut a fraction of a turn befor you tighten, learnt that recently, tested by putting pencil marks on the nuts, makes a small but significant difference... Karl