undertray bolt sizes

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GregR
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undertray bolt sizes

Post by GregR » Tue Aug 01, 2006 12:22 pm

anyone know what the sizes of the undertray bolts are for the good old S1? Going to replace them with stainless numbers when I have it off again.

Oh, and anyone got a spare 13m ratchet spanner I can borrow in the Edinburgh or Glasgow area?

Cheers chaps & chapesses,

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Sanjøy
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Post by Sanjøy » Tue Aug 01, 2006 12:33 pm

Flipping eck, you doing the Forth Road bridge ?
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Bennicus
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Re: undertray bolt sizes

Post by Bennicus » Tue Aug 01, 2006 12:35 pm

GregR wrote:when I have it off again.
Arf!



(sorry)
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Uldis
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Post by Uldis » Tue Aug 01, 2006 1:17 pm

It's M5 x 20mm hex head most of them, let's see 5 at the back, 3 each side plus the 5 that connect to the front undertray.... 16 of those (get 20, you always lose one or two)
And 4 x 20mm M8 dome head (allen)

In the Exige S1 they came already in SS standard...
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GregR
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Post by GregR » Tue Aug 01, 2006 1:24 pm

Sanjoy wrote:Flipping eck, you doing the Forth Road bridge ?
:lol:

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Shug
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Post by Shug » Tue Aug 01, 2006 1:27 pm

Uldis wrote:It's M5 x 20mm hex head most of them, let's see 5 at the back, 3 each side plus the 5 that connect to the front undertray.... 16 of those (get 20, you always lose one or two)
And 4 x 20mm M8 dome head (allen)

In the Exige S1 they came already in SS standard...
I'd chuck the M8 dome head ones though and put on some decent hex-head ones. Only a matter of time till you're cold, bored, wet and they are full of grit - then you round off the allen key feckers in five minutes...
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GregR
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Post by GregR » Tue Aug 01, 2006 1:33 pm

Agreed, that's the plan Shug :D

Just wish whoever owned my car before had the foresight to have it done, would've saved poor mac 15 minutes angle-grinding time! Still, given the booklet full of MMC service stamps, he never really had the car's best interests at heart ;)
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Uldis
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Post by Uldis » Tue Aug 01, 2006 2:03 pm

Funny, I never had a problem with the allen head, because they're upside down I guess grit just falls off and wet doesn't matter, they're SS and don't round off.

I recently lost one and went to buy another one exactly the same. I like them 8)
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Shug
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Post by Shug » Tue Aug 01, 2006 2:13 pm

Uldis wrote:Funny, I never had a problem with the allen head, because they're upside down I guess grit just falls off and wet doesn't matter, they're SS and don't round off.

I recently lost one and went to buy another one exactly the same. I like them 8)
For the short time I had them, I was forever digging sh*te out of them to get an allen key anywhere near them.....

You obviously don't drive the car enough mate :wink: :lol: :lol: :lol:
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mckeann
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Post by mckeann » Tue Aug 01, 2006 2:18 pm

Shug wrote:
Uldis wrote:Funny, I never had a problem with the allen head, because they're upside down I guess grit just falls off and wet doesn't matter, they're SS and don't round off.

I recently lost one and went to buy another one exactly the same. I like them 8)
For the short time I had them, I was forever digging sh*te out of them to get an allen key anywhere near them.....

You obviously don't drive the car enough mate :wink: :lol: :lol: :lol:
same experience here as shug.
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Sanjøy
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Post by Sanjøy » Tue Aug 01, 2006 2:24 pm

Was actually looking at Titanium ones today to save weight.
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Rich H
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Post by Rich H » Tue Aug 01, 2006 2:49 pm

Sanjoy wrote:Was actually looking at Titanium ones today to save weight.
Right, they work out at about £4 EACH! fill your boots... Or leave them at home and save more weight....

I have a ratchet spanner, will a socket set not do?

Good place in Scummers for bolts is White Milne and CO by the Cineworld, real cheap for A-2 stainless (OK it's not the shuttle spec A-4 stuff but it won't rot)
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Sanjøy
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Post by Sanjøy » Tue Aug 01, 2006 2:54 pm

Was waiting for a reply like that :) They were for the bike! And not that expensive.
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mac
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Post by mac » Tue Aug 01, 2006 5:47 pm

Yeah - but will eat through your undertray twice as quick as Stainless ones (which chew through it quicker than normal ones).


The problem with the dome headed bolts isn't the crud. The allen socket is design to turn the bolt head (and only the bolt head) what normally happens is that the bolt corrodes to the washer and the washer to the undertray - now your trying to turn something with a much wider radius that the bolt was designed for.

You have 2 remidies - 1 - duralac the washers (perfered option)
2- Put a plastic washer between the bolt head and the normal washer (mac option)

either way your cutting out the corrosion issues and the bolt head works against the force it was designed for.


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Rich H
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Post by Rich H » Tue Aug 01, 2006 11:11 pm

Stainless hex bolts on all, replace the undertray when it rots through, plenty of coppaslip on each bolt though as the SS sticks in the captive nuts
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