drft_n_sc

iTrader: (3)

I have a 92 SC300 and my exhaust manifold bolts always come loose, I've tried LOCKTITE, and I was wondering if anybody else has the same problem.

The bolts that go into the head come loose and the nuts that tighten the header also come loose. Should I buy new nuts and bolts, or WTF?

I would greatly appreciate everyones input, it drives me crazy that I have to retighten everything every 6-8 weeks.

vipsoarer

use a high grade lock washer or just get a new set that have built in lock washers and/or nuts

1JZ300

iTrader: (6)

i have the same problem.....mine come lose as well....i just tighten them everytime i drive it hard, its a pain but i works.....do you have the 1j by any chance??

drft_n_sc

iTrader: (3)

No, I have a stock 2JZ-GE. I've been thinking that maybe my head has been stripped and I need to rethread it. If I do so, would I need larger bolts? Has anybody done this in the past or had the same problem?

I have an extra motor and I've also consider rebuilding the other motor and just dropping it in, but it seems a little too much just to fix an exhaust header problem! Or maybe I could just rebuild the head and swap them! I don't know!

Everyones input would really be appreciated!

Thnak you

philauldridge

If you feel the bolts are too loose in the head, you could always install helicoils... any auto parts store sells a helicoil kit with correct size drill, helicoils and tool for little $. However, seems to me that if you can torque the bolt down in the head without it stripping, then there is not a thread problem. Honda makes a great concoction in a tube called "Hondabond"... put some of that stuff on the threads and I can virtually guarantee you they won't come loose.

mitsuguy

iTrader: (2)

lock washers and high grade nuts... always worked on my DSM...

drft_n_sc

iTrader: (3)

Thank you everyone that offered suggestions and I wanted to let everyone know what the problem is, my head is stripped and the bolts keep sliding out. So tomorrow, I will be attempting to fix the problem with HELICOILS (thank you philauldridge) and I will post a thread on it.

Once again thanks for all your suggestions and help!