How close can coolant hose be to the exhaust?

Iamzod · 6 Apr 2015 at 22:29

I have tried googling & got nowhere so thought I'd ask opinions here.

I have an almost finished engine conversion but have been unable to avoid running the hose that feeds the heater matrix from the engine rather close to where the exhaust manifold meets the yet to be fitted downpipe.

I am using standard rubber coolant hose, is this likely to withstand being 1.5 inches away from the exhaust or is it likely to end up with a major coolant leak?

Kaeo · 6 Apr 2015 at 22:35

Just wrap it in heat shrink and get it as far away as possible

shauncr91 · 6 Apr 2015 at 22:52

Heat wrap the down pipe and it should be fine?

breadturbo · 6 Apr 2015 at 23:33

depends on the engine I would have thought, if its a regular old lump I would have said no worries, if it's turbocharged then things get a lot hotter.

Iamzod · 7 Apr 2015 at 00:54

breadturbo said:
depends on the engine I would have thought

It's an old Cosworth BOA V6, not turbocharged.

ci_newman · 7 Apr 2015 at 07:20

Wrap the exhaust and the pipe and hope for the best I guess!

allllec · 7 Apr 2015 at 07:53

Hi there,

Assuming the hose is in good condition then 1 inch is a safe gap.

Kind Regards

Alec

leigh_boy · 7 Apr 2015 at 09:21

on an mr2 -v6 conversion we did we had the the same issue and used this. and not had any issues
http://www.demon-tweeks.co.uk/Product.do?method=view&n=1471&g=245856&p=19388&c=215&utm_source=Google&utm_medium=Base&utm_campaign=Heat%20Shielding%20&%20Protection&gclid=CPGT2qrh48QCFWZo7Aod4iUACg

InvaderGIR · 7 Apr 2015 at 09:24

Should be fine, the coolant might get a bit of heat from it but I'd have thought that'd be all really, if it's not rubbing it'll be ok. As has been said, as it isn't turbo charged or highly tuned then you'll not be getting ridiculous heat from the exhaust system.
Wrapping it is probably a sensible caution and should remove engine bay heat in general too anyway.