Cam timing chain guide bolts upgrade
05-27-2013, 12:09 PM
#30
PSI x bolt diameter 1/4" x PI for a M6 bolt then squared so...
150000 (verified by ASTM 10.9 chart) x .785 (square inches by root mean for threads) = 117750 -40% (shear is 60 percent of the bolts capacity since there is no ASTM standard) =
70602 lbs for my 10.9 bolt
You can do it for the ARPs (grade 12.9 equivalent).
The funny thing is mrb you were all against changing from the stock 9.8 grade in my thread but now you have changed your tune about using an even higher tensile 12.9 by arp than my 10.9. I certainly never ask for any of your opinion in my threads but there you are, all inconsistent and junk.
But this entire subject is invalid since the only reason the stronger bolts will help is that they can take more torque to tighten down without snapping them at 89 inch lbs.
The stronger shear force doesn't hurt.
05-27-2013, 12:12 PM
#31
Ill have to call arp. I figured ppl on here were intelligent enought to know that the sheer is proportional to the tensile strength.
As much as i would like to contribute to this forum i was tryin to share wat is avaliable. I dont do this for much profit if any. If anyone has issues with this ill keep my findings and ideas to myself. And trust me theres plenty more in the works.
As much as i would like to contribute to this forum i was tryin to share wat is avaliable. I dont do this for much profit if any. If anyone has issues with this ill keep my findings and ideas to myself. And trust me theres plenty more in the works.
Good to hear. I wouldnt stick to with those numbers cuz every bolt manufacture is different and has there own aloys they use which can change the strength of the bolt alot thats y u should never look at the high end of the chart. The range for a grade 10.9 is 130,000-150,000. Arp has a tighter tolerance 170,000-180,000.
But my consern is the intake side chain guide bolts.
I think the reason urs broke was cuz the bolt was over torqued during assembly or was weakened before. The reason i say this is cuz alot of ppl dont have a inch pounds torque wrench and just wing it by feel. 89 inch lbs isnt alot of torque. Its very easy to over do it.
But my consern is the intake side chain guide bolts.
I think the reason urs broke was cuz the bolt was over torqued during assembly or was weakened before. The reason i say this is cuz alot of ppl dont have a inch pounds torque wrench and just wing it by feel. 89 inch lbs isnt alot of torque. Its very easy to over do it.
It would be nice to have a new option for failing timing components.
05-27-2013, 12:45 PM
#32
The funny thing is mrb you were all against changing from the stock 9.8 grade in my thread but now you have changed your tune about using an even higher tensile 12.9 by arp than my 10.9. I certainly never ask for any of your opinion in my threads but there you are, all inconsistent and junk.
But this entire subject is invalid since the only reason the stronger bolts will help is that they can take more torque to tighten down without snapping them at 89 inch lbs.
The stronger shear force doesn't hurt.
this subject is not invalid
12-20-2014, 09:32 PM
#37
Are these bolts available anywhere? I can only find them on CED, but they are out of stock and appears suspiciously discontinued.
ARP Ecotec Timing Chain Tensioner Bolt Set 11588522R
Daniel
ARP Ecotec Timing Chain Tensioner Bolt Set 11588522R
Daniel
01-04-2015, 10:26 PM
#40
Senior Member
Thread Starter
Alot of ppl order them from CED wait 2 plus weeks and seem to find this thread and end up buying from me. Im shipping another batch to our European friends across the pond tomarrow.
04-25-2015, 10:06 PM
#42
New Member
Join Date: 07-23-14
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
timing chain guide bolt
hey whats up bro my guide bolt broke so I had to get it extracted when the shop did that they made my thread bigger so now I'm having an issue finding the bolt because of that spacer that holds the guide in place any suggestions on where I can get the bolt like this custom done
04-25-2015, 10:13 PM
#43
New Member
Join Date: 07-23-14
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
broken timing chain bolt
hey whats up bro my timing chain bolt broke and the guys at the machine shop made my thread bigger to be able to extract the broken piece of the bolt on the cylinder head now I need to get a bigger size bolt but shape the same way with the sleeve that holds the timing chain guide and place you think you might be able to help me out
