hello, I need the tap size for the 7m block... I saw it on here before, but now i can't find it... you know, the tool that you use to clean out the threads where the head studs go...
Tap size for the 7m block
- Thread starter johnathan1
- Start date
hmm now i know that we posted this not even a week ago.
<-- checks to see if SM crashed, nope. Search still works
but IJ is right
12mmx1.25
Sears does not carry and more than likely no autopart store will carry it. You need to special order it
<-- checks to see if SM crashed, nope. Search still works
but IJ is right
12mmx1.25
Sears does not carry and more than likely no autopart store will carry it. You need to special order it
special order from where?
and sorry about the post, I know that it was posted earlier, I tried searching, but I just couldn't find it, I didn't remember which post it was in...
and sorry about the post, I know that it was posted earlier, I tried searching, but I just couldn't find it, I didn't remember which post it was in...
hmm now i know that we posted this not even a week ago.
<-- checks to see if SM crashed, nope. Search still works
That is my kind of answer.
<-- checks to see if SM crashed, nope. Search still works
That is my kind of answer.
Edit: I read "exhaust threads" by mistake! My bad. The info below is ONLY for exhaust threads.
mcmaster-carr is awesome for this stuff! I just did this a couple months ago.
Here's the info:
mcmaster.com
Part # 91732A822 for the repair kit which gives you everything to tap the holes (plus a couple inserts but I don't recommend them since they're non-locking)
Part # 90296A343 for authentic helicoil screw-lock inserts
Have fun!
mcmaster-carr is awesome for this stuff! I just did this a couple months ago.
Here's the info:
mcmaster.com
Part # 91732A822 for the repair kit which gives you everything to tap the holes (plus a couple inserts but I don't recommend them since they're non-locking)
Part # 90296A343 for authentic helicoil screw-lock inserts
Have fun!
Last edited:
ummm
we need a tap to CLEAN the threads in the BLOCK NOT to enlarge them!!
Anyway most taps will not put a dent on the cast IRON block. Especially the cheap shit. If it is not High Speed Steel (HSS) it WILL break.
we need a tap to CLEAN the threads in the BLOCK NOT to enlarge them!!
Anyway most taps will not put a dent on the cast IRON block. Especially the cheap shit. If it is not High Speed Steel (HSS) it WILL break.
7M's have a bad habit of cracking the block between the Headbolt Holes and the steam holes after being surfaced if the holes aren't chased and then chamfered during a rebuild.
The idea of a chaser is it doesn't remove material just the crap in the hole, a Tap will do the same thing if you're very careful and use lots of wd40 or crc and keep an even load on both sides of the Tap Handle (NOT use a wrench to turn the Tap)
The idea of a chaser is it doesn't remove material just the crap in the hole, a Tap will do the same thing if you're very careful and use lots of wd40 or crc and keep an even load on both sides of the Tap Handle (NOT use a wrench to turn the Tap)
damn, thats scary as hell! Well, will I be okay if I do it, use lots of wd?? My block hasn't been resurfaced... I just want to clean the threads.