nwalton29

iTrader: (7)

Are LS main bolts torque to yield, or can you reuse?

Austinma62

Pretty sure they are reusable. I hope they are cause I reused them on mine.

jasongantt

there torque to yeild and should not be reused...get some ARP bolts....

gMAG

iTrader: (1)

They are TTY bolts, and they can be reused.
Got it from several of the gurus here on LS1tech.
Do not reuse the stock TTY rod bolts, though.

nwalton29

iTrader: (7)

Thanks. That just saved me $300.

jasongantt

ok......all torque to yeild bolts are all single use intentional. once you stretch them for an assembly, they are not going to give you the same torque to yeild the second time around.

straight from the LSX manual....

KCS

iTrader: (20)

You can reuse the OEM main bolts, except for the side bolts. The black colored main bolts are not TTY, but they are tightened in a similar fashion.

Austinma62

just follow the torque specs and sequence and make sure to put high pressure lube or grease underneath the bolt head and you should be good to go.

gMAG

iTrader: (1)

You can reuse the side bolts, as well.

gMAG

iTrader: (1)

I don't have the part numbers off-hand, but GMPartsdirect charges about $2.50 per bolt (mains & side bolts).
So, 4 bolts (2 types on each main) x 5 mains = 20 bolts x $2.50 per=$50....+ 2 small bolts per main x ???$2.00 per = $20 total=$70 + ship & handling.
If you prefer new bolts, it's approx less than $100 for oem bolts.
Also, your friendly dealer should have them in stock...just an alternative!

JS01

iTrader: (10)

They are torque to angle, not to be confused with torque to yield. They are re-usable except for the side bolts as previously stated. I would probably not re-use them more than 2 or 3 times though.

gMAG

iTrader: (1)

Thanks for the correction.
I realize that the side (little) bolts are tty, but many people reuse them.
Here is one....post#3

https://ls1tech.com/forums/generatio...cap-bolts.html

blahster

iTrader: (25)

The only reason the side bolts are not supposed to be reused is because they have a patch of sealant applied to the heads.

Direct from GM service information:

"In order to prevent engine block oil leakage, install NEW M8 crankshaft bearing cap side bolts.
The crankshaft bearing cap M8 side bolts have a pre-applied sealant patch applied to the bolt flange."

Document ID #73768 Crankshaft and Bearing Installation.

Therefore, both the main cap bolts AND the main side bolts CAN BE REUSED, however, you will want to apply a small bead of silicone to the underside of the side bolt head to seal it up. Make sure you clean the old sealant off FIRST.


sorry...just had to throw my two cents in here.

gMAG

iTrader: (1)

No apology needed...Your two cents is exactly the right answer!