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Flat4ever's Avatar
 
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Engine mount bar screw

Hello,

I would like to know the specification of the engine mount bar (73 + / side shifter) screws. Lenght, diameter, head, resistance. Metric units welcome



The thread of mine has been strongly damaged, but I am not sure that it was an OEM one ... Thanx for answers


Last edited by Flat4ever; 03-18-2003 at 04:29 AM..
Old 03-18-2003, 04:24 AM
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If my memory is working, it is a grade 8.8 steel bolt. 10 mm. You could install a 12.9 steel bolt in its place
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Old 03-18-2003, 04:30 AM
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Flat, you can read on the head of the bolt what it is. 8.8 is the lowest grade, apparently = to grade 5 SAE. I will get criticism for this, but I have replaced many of my thru bolts with Grade 8 SAE. This is due largely to the fact that metrics in the higher grades are scarce and expensive. In my case, a 3/8" bolt substituted for the 10mm just fine. I'll just have to remember to carry a set of stadard wrenches and sockets under there with me as well as metric. It's kinda like my Chevy truck. Half metric and half SAE. Hah!
Old 03-18-2003, 07:14 AM
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Personally, I prefer to keep the fasteners metric on my cars. But unfortunately, some aftermarket companies (like Weltmeister) have followed Zeke's reasoning, so I have a few SAE fasteners on my poor lil' 914...

Iffin I were at home, I could look up the length of the M10 bolt for ya. Or you could measure it... (The length that you would buy does not include the bolt head.) Also try to get something with the same amount of thread, or a little more, rather than threaded the whole way. They should be stronger that way.

And remember that the nut that goes on that bolt is self-locking. I don't remember if Nyloc was originally used, but it works just fine for this application.

--DD
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Old 03-18-2003, 07:21 AM
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If I put SAE nuts and bolts on my car, will it go slower???
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Old 03-18-2003, 08:20 AM
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Oh, if it's the length he wanted, it's 3 1/2" I thought he had the one sample.
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3.5" * (25.4mm/") = 89.9mm ...

So that would make it an M10x90 bolt. Sounds about right. I recall that it has a 17mm head. Uhh, I think.

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Old 03-18-2003, 01:40 PM
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Zeke... 8.8 is not the lowest grade in the metric DIN system. There is 4.x (most of the time 4.6) and possibly softer steel than that. 8.8 is pretty much the middle of the road quality ... used for most automotive applications. 10.9 and 12.9 is the tough stuff.
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Old 03-18-2003, 02:44 PM
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Quote:
Originally posted by yoh!!!
Zeke... 8.8 is not the lowest grade in the metric DIN system. There is 4.x (most of the time 4.6) and possibly softer steel than that. 8.8 is pretty much the middle of the road quality ... used for most automotive applications. 10.9 and 12.9 is the tough stuff.
Whatever. I guess I meant in the context of automobile fasteners. I've not run into any 4.anything. To me, that would be gate hardware. But, thanks for the info.
Old 03-18-2003, 03:19 PM
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Old 03-18-2003, 03:19 PM
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