WTB Primary Chain Inspection Cover 2006 Mastiff
- Thread starter RABBID1
- Start date
For your 03?
RABBID1
Member
No , My 06 Mastiff.
BWG56
Guru
Baker
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwibwPGY3fDVAhWGwiYKHQabB7EQFggmMAA&url=https://bakerdrivetrain.com/&usg=AFQjCNGFsXYfHV6rFD8Zs7A4YMW64ZjF4w
Under top tab labeled: Support, then Instructions, then down the left side: Big Dog service manual
KaptinAmerika
Guru
Don't buy the cast ones anymore.
Buy the updated billet version so this doesn't happen to you again.
Inspection Cover
80-90inlbs and no more
BWG56
Guru
If the new one is billet, instead of cast, why would you have to back off on the torque specification? makes no sense
Hmm...If the new one is billet, instead of cast, why would you have to back off on the torque specification? makes no sense
...good point, makes you wonder..
cdogg556
Guru
So you don't strip out the threads ya wanka!If the new one is billet, instead of cast, why would you have to back off on the torque specification? makes no sense
BWG56
Guru
The problem is not stripping the threads, its because the corner breaks off the cast inspection plate. The billet inspection plate will not break the corner off, so there's no reason to back off the torque spec. Stay with us here Cdoggy, has nothing to do with the threads
cdogg556
Guru
Hey ya "smart-ass" you stay with us!The problem is not stripping the threads, its because the corner breaks off the cast inspection plate. The billet inspection plate will not break the corner off, so there's no reason to back off the torque spec. Stay with us here Cdoggy, has nothing to do with the threads
The torque spec isn't for not breaking the corners off it's so you don't strip the threads out since with the new inspection cover the corners won't break off, the threads will strip out before the corners would ever break off, right? So stay with us here ya wanker! 
Hahaha! 
Last edited:
BWG56
Guru
Absolutely not at 108in/lbsHey ya "smart-ass" you stay with us!
WTB Primary Chain Inspection Cover 2006 Mastiff
There's the topic on the post, does it say he needs new threads,
I think the Calipornia air is getting to ya.
cdogg556
Guru
Absolutely not at 108in/lbs
WTB Primary Chain Inspection Cover 2006 Mastiff
There's the topic on the post, does it say he needs new threads,
BWG56
Guru
The problem is not stripping the threads, its because the corner breaks off the cast inspection plate. The billet inspection plate will not break the corner off, so there's no reason to back off the torque spec. Stay with us here Cdoggy, has nothing to do with the threads
Hey ya "smart-ass" you stay with us!
Absolutely not at 108in/lbs
WTB Primary Chain Inspection Cover 2006 Mastiff
There's the topic on the post, does it say he needs new threads,
KaptinAmerika
Guru
Oh please by all means go ahead and crank down on it.
Might as well over tighten everything else too while your at it.
I found more than a few things in the manuals that are inaccurate.
The torque for the inspection cover plate being one of them.
Last edited:
I don't quite understand where you get the idea that it would be considered "over tightened"
Would you be suggesting that the threaded holes in the primary are not strong enough to take the loads of 80-90 in/lbs??
You need to calculate the pull-out strength of the aluminum threads. Depending on your thread engagement, it could be the bolt will fail first, or it could be the threads will pull out. Conservative standard is preload to 60% of whichever is lower. I personally do not know the design intent that Big Dog had for the inspection cover (other than to be sealed), so I guess you must know what the intention was since you are saying their specs for torque on cap screws are "inaccurate"....bold statement to say the least.
KaptinAmerika
Guru
I'm not sure why, I know why but I'll keep it polite here, everyone wants to banter back and forth about threads stripping, bolt shear etc.
All we're talking about is what is the maximum amount of pressure the cover needs to exert against the seal to prevent leakage.
In my experience, with the hundreds of times I have had to put one back on, 80-90 inlbs is all that is needed to provide an adequate seal.
I'm done folks do what you want....
All we're talking about is what is the maximum amount of pressure the cover needs to exert against the seal to prevent leakage.
In my experience, with the hundreds of times I have had to put one back on, 80-90 inlbs is all that is needed to provide an adequate seal.
I'm done folks do what you want....
BWG56
Guru
Poor guy only wanted another inspection plate, why? he broke the corner off of the plate, he never said he needed new threads
New billet plate, STRONG,
cast plate brittle.
New billet plate, STRONG,
cast plate brittle.New billet plate, STRONG,
cast plate brittle.So when installing plate back on, put a small bead of silicon around edge of inspection plate area on primary cover and install gasket. Then add blue loctite to 1/4-20 screw threads and install finger tight using a X type pattern to tighten first to about 50 in/lbs, allow a few seconds for the silicon to dissipate behind gasket and while you wait turn the torque wrench to 85 in/lbs using the X pattern again, tighten to 85 in/lbs, adjust torque wrench to 108 in/lbs and tighten once again using X pattern and your done. I would recommend allowing the silicon to dry a few hours before starting it up. And this is only if you get the new BILLET plate, if you are still using the CAST plate then stay at 85-90 in/lbs, NOT because of the threads but remember CAST plate is brittle and the corner breaks off which brings us back to the original problem
