Block milling

[donnercm]

I have the engine out of my car and had the head resurfaced. Is it good practice to resurface the block as well? Should i go ahead and have it done while the engine is out of the car?

 

[Jerry]

I only mill them if there is rust or evidence of craters around the studs.

Jerry

 

[Keoke]

Should i go ahead and have it done while the engine is out of the car

I would say yes just to insure the surface is level--Fwiw--Keoke

 

[57_BN4]

Depends on how much work you want to get into as block skimming requires a full teardown and then if you are going that far may as well do bearings, rings... Also depends on why you had the head skimmed, did it blow the gasket?


Andy.

 

[EV2239]

Why bother unless the head gasket was leaking, just check for flatness and corrosion.

 

[Randy Forbes]

And to continue the subject, depending on the amount of material removal necessary to achieve a flat and true deck (<span style="font-style: italic">true</span> to the centerline of the crankshaft__which should be checked and line-bored, if required...) then you get into issues of deck-height versus piston crown height__they cannot be higher than the deck.

At least you don't have to compensate for cam timing; that only becomes an issue when you <span style="font-style: italic">deck</span> both the block and head(s) on an overhead cam engine, due to shortening the span of the timing chain(s) or belt(s).

Slippery slope, but to truly "blueprint" an engine, which is to say, to build it entirely within specification, those (and much more) are all to be taken into consideration.