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CodeMan
06-03-2010, 07:44 AM
Been reading past threads about UDP's, & I have two important questions before installation of my UDP's.


(1) Should I purchase new bolts??

(2) How much torque is used when installing UDP's????
musclemerc
06-03-2010, 08:00 AM
1) Yes because the stock bolts are TTY
2) I went 90lbs and made a tool to hold the crank to keep it from spinning
you can use an impact wrench just tighten it too
SpartaPerformance
06-03-2010, 11:46 AM
It's recommended to get a new crank bolt. as for torque they come with install instructions so follow them to the letter!!!
J.bo
06-03-2010, 12:32 PM
What's the part # for the bolt? An ARP part # preferred. I'm doing this install soon also.
ImpalaSlayer
06-03-2010, 01:10 PM
ARP

156-2501

comes with washer
CodeMan
06-03-2010, 01:53 PM
Nevermind......dealership already fouled up and broke the crank bolt. :mad2:
Zack
06-03-2010, 01:55 PM
Ive re-used crank bolts as many as 10 times and never had a problem...save your money
CodeMan
06-03-2010, 02:06 PM
Waiting for them to have another bolt shipped. Its times like this......I wish I had the tools, the garage and some time, so i could do it myself. :banghead:
musclemerc
06-03-2010, 04:02 PM
You went to the dealership to have pully's installed?
Your right you need tools!
281MERC
06-03-2010, 04:21 PM
Ive re-used crank bolts as many as 10 times and never had a problem...save your money
agreed, its steel, not a gasket
281MERC
06-03-2010, 04:24 PM
o ya....i did mine to 120lbs
musclemerc
06-03-2010, 04:48 PM
Read post #6 and #8 the TTY bolt broke on the reinstall as it should have.
It's a one time use bolt.


agreed, its steel, not a gasket
RacerX
06-04-2010, 09:34 AM
I had Chuck Norris hold the bolt with his gaze while I turned the engine over. He had to close his eyes though because it wouldn't turnover... :burnout:
CBT
06-04-2010, 09:39 AM
I had Chuck Norris hold the bolt with his gaze while I turned the engine over. He had to close his eyes though because it wouldn't turnover... :burnout:
LMAO! :lol:
Zack
06-04-2010, 09:45 AM
Read post #6 and #8 the TTY bolt broke on the reinstall as it should have.
It's a one time use bolt.

TTY bolts rarely break, they will stretch though.

Ive compared the lengths of new bolts to used bolts and they are near identical.
ImpalaSlayer
06-04-2010, 12:13 PM
TTY bolts rarely break, they will stretch though.

Ive compared the lengths of new bolts to used bolts and they are near identical.


lol they dont stretch that much.

i hate dealing with broken bolts so i always replace them, not worth it IMO
Zack
06-04-2010, 12:15 PM
lol they dont stretch that much.

i hate dealing with broken bolts so i always replace them, not worth it IMO

No not a bolt this big.

Ever seen a modular rod bolt stretch? It can grow an inch if you look at it wrong :eek:

^^^Insert comments^^^ :D
CBT
06-04-2010, 01:57 PM
No not a bolt this big.

Ever seen a modular rod bolt stretch? It can grow an inch if you look at it wrong :eek:

^^^Insert comments^^^ :D
That's what I said!!!