c6matt

iTrader: (1)

replacing my flywheel with an SFI piece, what should I put on the crank bolts?

red loctite on the converter bolts?

Tried a search.. thanks for the help!

1gt2nv

iTrader: (5)

I would use red locktite. I think the bolts that came with the sfi flexplate should have some type of loctite on them. My TCI bolts do. But I'm going to try the tape loctite.

trans2000am

iTrader: (49)

yes red loctite, u dont want those coming out at high rpms!!!

c6matt

iTrader: (1)

red loctite it is! Thanks guys!

01ssreda4

iTrader: (96)

Rule of thumb....if it goes into steel loctite is fine, if it goes into aluminum, anti-seize is right. Since the crank is steel then loctite is cool. I tend to use the blue medium strength for most things. Never had a bolt back out using that.

1990LSx

iTrader: (9)

yeah the red stuff makes for fun removal when you have to.

JRENIGAR

iTrader: (37)

THIS... Red locktite just makes for having to use heat to remove it safely and not break bolts. I wouldnt use heat on any internal engine parts... Blue locktite is alot stronger than most think if the threads are clean of oil when applied.

senicalj4579

iTrader: (41)

I didnt put any on my crank bolts. I actualy didnt think about it. They were all pretty tight threading in hopefully it will be ok. I did use blue loctite on tc bolts though.
OP if I was you I would use blue.

wayland1985

Digging this back up: do you need thread sealer too?

bbond105

I have never used a thread sealer on flywheel to crankshaft bolts and have never had an issue of them backing out. Just torque to specs, but it wouldn’t hurt anything if you want the added insurance of using a thread sealer.