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James5
14-10-2009, 12:03
Hi All,
Just in the process of replacing my H/g and might aswell renew some of the bolts (as looking a bit ropey), please can someone tell me the the length and the thread type for the bolts that hold the blanking plate on the cylinder head (opposite end to water pump).
Many Thanks James
stuTHC
14-10-2009, 12:47
M6, 20mm long.
James5
14-10-2009, 13:56
M6, 20mm long.


:cooter:many thanks
markey b
14-10-2009, 14:51
are you planning on allen key heads?

i swapped mine over to stainless allen key ones, but now i can't take the plate off without taking off the exhaust manifold! doh!!
tobester
14-10-2009, 15:08
are you planning on allen key heads?

i swapped mine over to stainless allen key ones, but now i can't take the plate off without taking off the exhaust manifold! doh!!

Bugger, I've done the same! :ashamed:
James5
14-10-2009, 15:57
are you planning on allen key heads?

i swapped mine over to stainless allen key ones, but now i can't take the plate off without taking off the exhaust manifold! doh!!


Darn just purchased the allen key headed bolts, ohwell will still go down this route and worry about it when I need to take the plate off.
stuTHC
14-10-2009, 15:57
Warning!!

DO NOT use stainless steel bolts in an aluminium head, ever. They are dissimilar metals. Put 2 dissimilar metals together and corrosion will occur. Add in an environment that encourages corrosion. (i.e water and heat) and the rate of corrosion will be increased and you'll be in a world of hurt when it comes to removing the bolts.
James5
14-10-2009, 15:58
Ok looks like I will have some spare m6 bolts:laugh:
Big Steve - Raider
14-10-2009, 15:59
Warning!!

DO NOT use stainless steel bolts in an aluminium head, ever. They are dissimilar metals. Put 2 dissimilar metals together and corrosion will occur. Add in an environment that encourages corrosion. (i.e water and heat) and you'll be in a world of hurt when it comes to removing the bolts.

:agree: However you can't use Aluminium Bolts as they break so aren't you just stuffed no matter what you do?!
stuTHC
14-10-2009, 16:01
:agree: However you can't use Aluminium Bolts as they break so aren't you just stuffed no matter what you do?!

Not really, mild steel and ali are not as dissimilar as stainless and ali, or used a coated steel bolt. Or stick a big lump of zinc to the engine block alla phase 1 landrover chassis :D

LOL at ali bolts, is that like a chocolate fire guard? :D
Big Steve - Raider
14-10-2009, 16:03
LOL at ali bolts, is that like a chocolate fire guard? :D

No it's kinda similar to an Ashtray on a Motorcycle :D:wasntme:
stuTHC
14-10-2009, 16:18
No it's kinda similar to an Ashtray on a Motorcycle :D:wasntme:

ahh, okay, got you now. You mean more like a condom machine in the Vatican rather than a waterproof teabag, cool :D