I am rebuilding a 22RE engine. I had to drill the plugs out of the oil gallery passages (they were frozen) in order to boil the block. Now I need to find replacement plugs. However, this is proving to be exceedingly difficult. Every autoparts store and hardware center just looks at me like I'm crazy when I show them the old plugs. The reason is that they have metric threads, and one of them is an oddball size for a plug, even for a metric.

What I need is one of each:

M16x1.5 socket head plug, flush type (7/8" taper),
M13x1.25 socket head plug, flush type (7/8" taper).

If anyone has any idea where I can find these, please let me know. I've been searching for nearly 2 weeks now. I would really like to avoid having to have a pair custom machined.

 

are you sure they aren't british pipe thread? i know the sender holes for oil pressure are BPT.

 

It would be so much easier if they were, but nope. They really are metric.

 

Found them! The good people over at LC Engineering carry them.

BTW: I didn't notice them at first, but there are 4 plugs in the crank as well. It's a good idea to pull them if you have the crank serviced so that you can clean all the muck hiding inside the crank oil passages.