"New Puma Air Compressors" FYI

[OLEJOE]

On new puma air compressors the headbolts need to be retightened after it has been run enough to be warmed up. I found this out after I had to replace the center head gasket between the 2 reed plates. I guess the aluminum head with cast iron cylinder contributes to this some. Hope it helps somebody.

 

[finn]

Millions of engines have been produced with iron blocks and aluminum heads. Nobody requires a retorque.

 

[G_P]

That sounds like shoddy craftsmanship or quality control. Those bolts were not torqued correctly at the factory.

 

[1foxracing]

Was not covered under warranty? Please photograph the owners manual where it states the heads must be re-torqued.

 

[MacMcMacmac]

Have not heard of this, but IR has a re-torque requirement for head bolts on older Type 30 compressors whenever new gaskets have been installed.

 

[71goldss]

Not just Puma! The manual for my 5hp 60 gal Quincy states to re-torque the head bolts to 21 ft lbs after the first hour of use.