Stainless UNC bolts

tetlow · Post by **tetlow** » Mon Jul 16, 2007 6:52 pm

I am looking to get stainless bolts for the Water pump , timing chain cover etc.
Does any one know any one who does them?
I have been on the hunt but only the basic sizes are available. The sizes I need are a bit odd, e.g. 5/16 UNC x 5.5"
I am also looking for stainless exhaust studs.

Regards
Dave

Rover 3.5

The Original Tom · Post by **The Original Tom** » Mon Jul 16, 2007 7:43 pm

I'd look into studding the lot. I really don't see the benefit in having bolts ANYWHERE, other than they're less likely to rattle free. If you threadlock everything, then studs are the best way to go IMO.
For instance things on the inlet manifold of the rover V8 have a habit of rusting and then shearing as soon as you apply pressure. For this reason I've studded everything with brass or stainless bolts and nuts.
I'd wager you can buy long lengths of threaded 5/16th bar from any fixings place for pennies, and a handful of nuts.
Then spend a few minutes with a grinder/hacksaw and a set of moddeling files getting the lengths you require, and presto: for a little time they'll be easier to replace next time by far, and even better you save ££££!

I'd not recommend it for high-stress applications such as main bearings or heads (unless you buy the right bar, even then I'd be dubious) but for everything else it's better.

HTH
Tom.

v8man · Post by **v8man** » Mon Jul 16, 2007 8:04 pm

is this the thing you want ?

http://www.stainlessbolts.co.uk/id15.html
also real steel does arp ones

Post by **katanaman** » Mon Jul 16, 2007 8:25 pm

There is a guy on Ebay does them for not a lot of money. Be warned though as the add that was linked to states these kits are for the early rover I.E P6. They might fit the SD1 engine but will not fit the 4x4 style front covers and pumps.

cimoss · Post by **cimoss** » Tue Jul 17, 2007 5:49 am

have used with great service and speedy delivery the following guys for stainless fittings

http://www.a2stainless.co.uk/

http://www.aruncas.com/

tetlow · Post by **tetlow** » Tue Jul 17, 2007 7:13 am

Excellent Guys.

Dave

mgbv8 · Post by **mgbv8** » Wed Jul 18, 2007 9:33 pm

I know thhere are lots of folk doing ss bolts and studs for the RV8. But isnt there an issue with some sort of reaction with SS and ally?

I may be thinking of something else, But I'm sure I was told by a nut and bolt supplier that SS and ally dont mix very well?

Post by **katanaman** » Wed Jul 18, 2007 10:28 pm

They don't mix if you have a small amount of alloy but the amount of alloy in an RV8 it makes no odds. Bike guys have been using stainless in their engines for decades on highly polished parts and they don't suffer. In fact unless you change the fasteners to stainless your guaranteed to have to drill standard fasteners out when the snap.

ppyvabw · Post by **ppyvabw** » Thu Jul 19, 2007 10:32 am

tetlow wrote:I am looking to get stainless bolts for the Water pump , timing chain cover etc.
Does any one know any one who does them?
I have been on the hunt but only the basic sizes are available. The sizes I need are a bit odd, e.g. 5/16 UNC x 5.5"
I am also looking for stainless exhaust studs.
Regards
Dave

Rover 3.5

I made my own studs for the timing cover bolts. Just used normal bolts for the water pump. I really was not happy with using bolts. I think its crap, when they are going into such small aluminium threads.

I got a length of 5/8 stainless bar and cut threads with a die. UNC to go into the block and UNF to take a bolt.

Paul B · Post by **Paul B** » Thu Jul 19, 2007 3:54 pm

mgbv8 wrote:I know thhere are lots of folk doing ss bolts and studs for the RV8. But isnt there an issue with some sort of reaction with SS and ally?

I may be thinking of something else, But I'm sure I was told by a nut and bolt supplier that SS and ally dont mix very well?

This is a bit of an urban legend about fizzing and corrossion the second you screw SS into ally. There is very little more than you get with mild steel into ally, but it all depends on exactly which type of stainless and ally you are using.

As mentioned above, bikers have been fitting SS screws into engine cases since the dawn of time with no adverse results. Just use some anti sieze paste, like you'd do with a normal bolt.

5000SE · Post by **5000SE** » Thu Jul 19, 2007 10:09 pm

Paul B wrote:
mgbv8 wrote:I know thhere are lots of folk doing ss bolts and studs for the RV8. But isnt there an issue with some sort of reaction with SS and ally?

I may be thinking of something else, But I'm sure I was told by a nut and bolt supplier that SS and ally dont mix very well?
This is a bit of an urban legend about fizzing and corrossion the second you screw SS into ally. There is very little more than you get with mild steel into ally, but it all depends on exactly which type of stainless and ally you are using.

As mentioned above, bikers have been fitting SS screws into engine cases since the dawn of time with no adverse results. Just use some anti sieze paste, like you'd do with a normal bolt.

Quite right. Stainless and alloy are actually on a wider separation on the electrolytic scale, but unless they're exposed to a corrosive environment, it's not a great problem. What also makes a difference is which material is in the majority - you can put SS bolts into alloy blocks with no more trouble than mild steel bolts, but if you were to put alloy bolts into a SS block, they'd soon rot away. Thankfully, we don't do that!

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