what grade should engine support bolts be ?
03-09-2007, 02:02 PM
#21
Geronimo36
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In all my years doing this, 99% of all the motor mount bolts I've ever seen are steel. The zinc chromate plated helps with the corrosion. Also, most of the offshore mount thru bolts have always been fine thread steel, not coarse.
03-09-2007, 03:48 PM
#23
Emerald Coast of Florida
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Another thing everyone should be very concerned about is there are a lot of fake hardware manufacturers out there.
I'm in the military equipment business and virtually every fastener we use is grade 8. A number of years ago a lot of fake grade 8 stuff was being made in Taiwan.
ed
I'm in the military equipment business and virtually every fastener we use is grade 8. A number of years ago a lot of fake grade 8 stuff was being made in Taiwan.
ed
03-09-2007, 04:03 PM
#24
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I've heard that grade 8 shears more easily than grade 5, even though it has a higher tensile strength. I don't know for sure. I do know that grade 8 doesn't rust as quickly as lower grade bolts.
03-09-2007, 04:13 PM
#26
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There should be businesses that specialize in fasteners in any decent size city. Here in the Detroit area I can think of about 6 right off the top of my head. They are much cheaper than ARP. Get the grade 8 and you'll be fine.
03-09-2007, 04:19 PM
#27
Geronimo36
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03-09-2007, 11:02 PM
#29
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Something I have noticed on aftermarket truck suspensions they use Grade 5 bolts. But they are very large diameter, 7/8ths etc.
03-10-2007, 02:12 AM
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