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Old 05-04-2003, 07:51 PM   #1
turner
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MY02 RS, 5MT

Default a true pro will know

Okay this is a small thing, but it is driving me crazy.
MY02 RS.
Looking straight-on into the engine bay.
Driver's side, in front of the air cleaner box, and just under, slightly to the right of of the throttle cable assembly.
There is an unused, threaded hole on the surface of the engine block. (On the flat area above it are four holes and a stamped number.)
I want a short bolt to fit that threaded hole. Can anyone tell me what bolt diameter and thread pitch to ask for? I don't have an odds and ends inventory to experiment with. Parts guys won't move. If I say a short 12mm bolt, it's not enough. My "authorized Subaru dealer" parts guy told me to go to a hardware store. Right. But I tried it hoping I might find something that would lead me closer. I don't want to drive to a parts place, start unbolting engine stuff hoping to find a bolt that fits the hole, then take it into the parts guy and say, one of these, please -- so I thought I'd give it a shot here. Sheesh, you know?
Thanks.
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Old 05-04-2003, 08:35 PM   #2
Kostamojen
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Its to hard to drive to a place like Kragen or Pepboys and ask them if you can look through their bolts and find one that fits? I do that all the time, they dont care.
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Old 05-04-2003, 09:04 PM   #3
Brad Pittiful
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maybe this can help...get some silly putty...now press it into the hole a little....dont push it all in cause u may get some stuck in there...but ok...not say u have a 1/4 inch nub and it looks kinda like a nipple shape...take the "nipple" to a place that sells bolts and u can match the width to a bolt...hopefully i describe it ok...good luck
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Old 05-05-2003, 02:40 AM   #4
HndaTch627
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IIRC it's a M8x1.25
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Old 05-05-2003, 03:01 PM   #5
Austin
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Look at the strut top mount bolts - there are 3 securing the top mount to the strut tower.

If the hole is the same size as those, then it's an M8x1.25. If the hole is bigger, then it's an M10x1.25. If the hole is smaller, then it's a M6x1.00.

An example of an M10x1.25 bolt is an exhaust flange nut/bolt combo, or where the exhaust manifold bolts to the head.
An easily viewed example of an M6x1.0 bolt is one of the bolt securing the front timing belt cover to the back portion of the timing belt cover.

There are different metric thread pitches in those bolt sizes, but Subaru usually uses those...
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Old 05-16-2003, 08:00 PM   #6
turner
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Austin and Hndatch627 thanks for your replies. I shoulda checked back.

Took me all of 30 seconds to find the right thread fit once I finally found a place where I could look at what they had instead of having to ask. Why is it people have to make everything complicated when it isn't.

Anyway -- if anyone out there with an RS is doing the grounding mod and wants to use that hole on the block, it's an M8-1.25. 12mm is the shortest I could find and is too long for one washer and one 8ga. ring terminal. So you'll need a hacksaw.
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