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Cheap stainless Engine bolts

Posted: October 31st, 2008, 7:25 am
by Roostius_Maximus
In Canadian $ the complete set is max $22.00
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Posted: October 31st, 2008, 7:34 am
by lewisclan
have you ran these

Posted: October 31st, 2008, 7:39 am
by Roostius_Maximus
no, just got them and bolted the cases together to test lengths

Posted: October 31st, 2008, 7:41 am
by Roostius_Maximus
crappy cellphone pic,
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Posted: October 31st, 2008, 7:47 am
by lewisclan
so when you drop em on the concrete do they sound hard or soft

Posted: October 31st, 2008, 8:10 am
by Roostius_Maximus
from what height, and what kinda floor?

what kinda test is that?

fastenal is calling me back on the specifics

Posted: October 31st, 2008, 8:17 am
by lewisclan
are they hard or soft bolts .2' above the concrete drop test , its kinda like the rockwell test . hehe

Posted: October 31st, 2008, 8:22 am
by Roostius_Maximus
they are rated at 65000psi, 101000 tensile strength, so i figure thats like grade 3 :?
when i look at the book there is a beter one thats above grade 5 that i was supposed to have gotten, i'd better find out wtf!

Posted: October 31st, 2008, 2:29 pm
by racer786
stainless=sucks never use stainless on a engine part especially head/ cylinder bolts... :shock: ...

Posted: October 31st, 2008, 7:34 pm
by Roostius_Maximus
the stainless case bolts could never be a problem at this grade anyways, but beyond that

-the case has dowels so there is no shear force on the bolt
-the threads in the case are far weaker than the bolt


i've personally never met anyone foolish enough to use stainless bolts for head bolts, and altho it is an engine, there are only studs holding the jug to the case and studs holding the head to the jug that are relevant, the rest of the bolts have no load

Posted: October 31st, 2008, 9:28 pm
by robertg
I have some stainless head bolts and studs left over from my watercraft days. I don't know what grade of stainless they are, but some of them are magnetic.

I never had a problem with them.

Posted: December 10th, 2008, 7:34 pm
by NightBiker07
depends on the stainless used to make the parts.

i'm no metal expert, but i know that stainless work-hardens to ungodly strengths. and it is a PAIN in the ass to machine without tearing tooling bits to shreds.

but, i dont see a problem with using them for case bolts. it makes things more visually attractive, and regardless, the bolts are stronger than the aluminum threads in the case.

Posted: December 17th, 2008, 12:43 pm
by Roostius_Maximus
I'll fill ya in on something, The bolts holding the roller rocker shafts onto the top fuel engines are 5/16 stainless with torx heads

Posted: December 17th, 2008, 12:49 pm
by Exnav
Are the shafts T&D or Jesel stuff....or neither?

We should of had a beer at PRI.

Posted: December 17th, 2008, 1:31 pm
by Roostius_Maximus
crane quicklift systems attatch the shaft to the pedestal with them, and all jessel in the same position, Td's 10000 series rockers are carbon steel fasteneres

Posted: December 17th, 2008, 10:59 pm
by nmdesertrider
when in doubt, OEM

Posted: December 18th, 2008, 7:31 am
by Roostius_Maximus
Exnav, I did see fastkart there and he said you were in the Mahle booth, it should have tracked ya down

Posted: December 18th, 2008, 8:52 am
by Exnav
No probs, I was in a lot of booths and with customers.

Re: Cheap stainless Engine bolts

Posted: December 23rd, 2008, 2:31 pm
by robertg
I went to two different Fastenal locations and they won't let me buy single bolts. I have to order a pack of each size. Is the number before the a the length of the bolt? I'm going to order some on eBay.
Roostius_Maximus wrote:In Canadian $ the complete set is max $22.00
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