how to tell how many times a head's been milled?

[ianfotheringham]

So ive pretty much decided a new engine is under the necessary column on the preparations list, apparently 300,000km is a bit demanding of the 2F...and so i'll be looking at one tomorrow- hopefully finding one with either standard or 25 pistons/cylinders...as mine has already been bored out to 75 and is wicked hot and silly slow...

my question is how to best tell how many times a head has been milled, as i know what to look for in the block...i dont know if ill have access to properly accurate measuring tools - so if you have any first hand/tick advice - it would be greatly appreciated...

 

[Ziffdaddy]

See if there is a machinist's stamp on the head. Sometimes they'll stamp how much has been removed....or have the combustion chambers volumes measured....Hopefully someone else has more ideas.

 

[FJ40Jim]

IIRC, a new standard head is 3.750" thick. One of those dimensions that was not metrified when toyota adapted the design from GMC.