Fly cutting a cylinder head - GIF

[Frank S]

I have to do my Tacoma block. It'll be an adventure.

Mark

Several years back I rebuilt a 22rt that had been seriously overheated. .018" on the head and .012" on the block for a total of .030" That was too much in my opinion to maintain long term reliability. But the Machine shop just provided a thicker head gasket. and said have the customer bring the truck back to have the head retorqued after 10K miles and it should be fine. They didn't and at 50K miles the head gasket let go Some Toyota engines can take that much machined off and still retain the original thickness head gasket. other cannot, if you have to go with a thicker head gasket or even a standard one Retorque the head/s after 10 K And always use new head studs/ bolts after any rebuild. If your engine has torque stretched bolts replace them 1 at a time when retorquing.

[mwmkravchenko]

Several years back I rebuilt a 22rt that had been seriously overheated. .018" on the head and .012" on the block for a total of .030" That was too much in my opinion to maintain long term reliability. But the Machine shop just provided a thicker head gasket. and said have the customer bring the truck back to have the head retorqued after 10K miles and it should be fine. They didn't and at 50K miles the head gasket let go Some Toyota engines can take that much machined off and still retain the original thickness head gasket. other cannot, if you have to go with a thicker head gasket or even a standard one Retorque the head/s after 10 K And always use new head studs/ bolts after any rebuild. If your engine has torque stretched bolts replace them 1 at a time when retorquing.

Thanks Frank.

My rebuild experience is 7 VW diesels. A simple motor but all the principals are there. I am not sure if the Toyota's use stretch bolts. But the VW did. And I agree replace with new. I am pretty sure that this was done before and buggered. I may even try my hand at building up the block and head because it has overheated a few times. That I will determine when I get it apart. have to clean up my shop to get it in there in the first place. Winter is coming and here is starts in December until April.

Mark