What is the cheapest and most efficient way to fix some stripped threads on a block for headbolts? Its a B20B block already been re-tapped for a B18C head.. I wanna fix it and then maybe sell it or work on it...

 

What do you mean retapped? The thread pitch should be the same...

 

yea, im also confused.

bump for some clarification

 

Some sort of Heli-coil is probably the best bet.

 

Helicoil'd head bolts dont hold - they rip out and then oversized studs are required (or big-sert)
Timesert is the only real way to go...but i dont think thats needed here (until we get clarification on this anyway)

 

The block was give to me from a friend like 4 years ago... But I havent touched it since... I was gonna get heli-coils for it but it was like $300 back then for it so i decided to just not mess with it... Well anyways, when my guy had it... He had a GSR head on it... But when the head gasket blew... They accidently stripped one of the headbolts putting it back without a torque wrench... So he just got himself a new motor and gave me the block... If I remember right though, i was told that GSR headbolts were bigger so they retapped the holes on the block to make them bigger... I could be wrong but that was what i was told... I used to mess around a lot on cars but i havent for so long now so ive forgotten quite a few things...

 

all b series head bolts are m11x1.50
you still need to repair that thread, but do not use helicoil...like i said, it will tear out and you'll have a bigger problem.

 

So should i use the Time-Inserts...

 

yes, of course
i rent a b series kit (see in my signature)
if you cant find a machine shop in your area that does them, send me a message and we'll talk about renting it