M30 head bolts oiling

[535ise]

Thanks a lot for your help

One more question that i've thought of is a thread tap the same thing as a thread chaser ?

I haven't got a head bolt to measure but i've got a M12x1.75 tap i can use to clean the head bolt holes out if it's OK to use ?

Thanks

Andrew

[winfred]

a chaser would be better, it's far less likely to damage the threads

Thanks a lot for your help

One more question that i've thought of is a thread tap the same thing as a thread chaser ?

I haven't got a head bolt to measure but i've got a M12x1.75 tap i can use to clean the head bolt holes out if it's OK to use ?

Thanks

Andrew