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914World.com _ 914World Garage _ Engine Mounting Bolts

Posted by: scruz914 Jan 17 2005, 07:35 PM

Do I need to buy the genuine OEM front engine mounting bolts or can I just buy the equivalent at the hardware store? M10x85 are the spec. I was even thinking of getting stainless steel, maybe from the local marine store (one of the ones I pulled out was very rusty). $3.95 for just one bolt sounds a little steep. Buying two isn't going to kill me. I was just wondering. Oh, and I already ordered a set of nylon engine mounts from James so the setup will be stiffer than stock.

TIA

-Jeff

Posted by: Cap'n Krusty Jan 17 2005, 07:56 PM

Ya want something of the appropriate hardness. You don't say whether your car is early or late. Early cars use an allen head bolt, narrowing the availability. I'd be inclined to go OE or find something from your local John Deere or Caterpillar dealer. The flat washer and nyloc nut are a must.......... The Cap'n

Posted by: scruz914 Jan 17 2005, 08:16 PM

It is a '73. Agree on the hardness. I'll look into it more. Marine grade hardware is tough stuff. I consider it a no brainer on the nyloc nuts. Washers too.

Posted by: URY914 Jan 17 2005, 08:26 PM

Marine grade (stainless steel) is not really hard. Grade 8 is much harder.
Keep the stainless on the boat or in the kitchen, but not holding your engine in.

Paul

Posted by: scruz914 Jan 17 2005, 08:54 PM

QUOTE (URY914 @ Jan 17 2005, 07:26 PM)
Marine grade (stainless steel) is not really hard. Grade 8 is much harder.
Keep the stainless on the boat or in the kitchen, but not holding your engine in.

Paul

I see that, now that I am looking at the ASTM and SAE Grade chart for steel bolts and screws.

I guess the thing about SS and marine applications is its corosion resistance. I used to race on Santa Cruz 50s and there are some extreme loads on the hardware. I know very little about metals and was making an assumption.

Posted by: scruz914 Jan 17 2005, 09:07 PM

Damn. I just looked further into the SAE and ASTM grading and I think I'll go ahead and spring for the OEM bolts. I would spend much more than the $7.18 just doing the research. Learned something though.

Posted by: URY914 Jan 17 2005, 09:24 PM

Also stainless steel knives won't hold a sharp edge like good ol' carbon steel.

(but don't try to tell this to some people)

Posted by: rhodyguy Jan 17 2005, 10:47 PM

i recently pickup new grade 8 hardware at a local fastener coompany. can't i just use a lock washer with the same grade or do i HAVE to use a nylock? if so why?

kein