Hi All

I'm currently doing the head on my EA.

I want to clean the head bolt holes in the block.

I have the correct metric tap ( 12mm & 1.5 pitch ) and measured
the threads carefully long ways against a bolt. It seemed OK.

When I tried the tap in a bolt hole, it started fine but then I felt
a certain amount of resistance, enough to make me think
it may be cutting a little metal. So I've stopped for now.

Is this normal ??
Has anyone used a shop bought tap and the effects ??

I do have an angle grinder, so I suppose I could cut a couple of slots
in an old head bolt.

Do you use the cutting or grinding disc for this ??

Thanks

Dont use a tap just use a old head bolt the threads in the block are slightly rounded and the taps are sharp and you will stuff your block

^ What he said.

Clean your old head bolts and use that to clean the holes...or alternatively use a compressor and air gun...works a charm if you can get your hands on one.

phong =P~

Thanks for the replies.
I'll have to whip out the angle grinder and try to cut
a slot or two in an old head bolt.
At least I can have 14 goes. Hopefully I'll get one right. lol