Heat protection
Discussion
My Vixen is resprayed and almost ready to go back on the road again.
I have the standard 1600 crossflow engine and I was thinking if I need
some heat protection on the inside of my bonnet.
Can the heat of the engine damage the paint on the outside of the bonnet (for example blistering)?
I have the standard 1600 crossflow engine and I was thinking if I need
some heat protection on the inside of my bonnet.
Can the heat of the engine damage the paint on the outside of the bonnet (for example blistering)?
It certainly can Eric, or at least that was what my paint man told me.
Apparently old fibreglass can begin to lose its structure if subjected to excess heat, resulting in dips/hollows in the finished painted surface. This happenned to the bonnet of my Tuscan V6, probably because after the rebuild the engine initially was running too lean.
My bodyshop was good enough to repair the damage for me, but I have since painted under the bonnet with heat shield paint.
Good to hear the car's nearly done, although are they ever ???
Mike
Apparently old fibreglass can begin to lose its structure if subjected to excess heat, resulting in dips/hollows in the finished painted surface. This happenned to the bonnet of my Tuscan V6, probably because after the rebuild the engine initially was running too lean.
My bodyshop was good enough to repair the damage for me, but I have since painted under the bonnet with heat shield paint.
Good to hear the car's nearly done, although are they ever ???
Mike
I've just looked at your profile - paint looks great.
I've seen various reflective films that can be applied but have no experience of them as the vehicles I've worked on have had aluminium bonnets mainly.
A different approach - are you intending to use exhaust wrap on your exhaust manifold. I've had good results reducing underbonnet temperatures on sevens with wrap. If your thinking of doing it - it's worth getting a decent quality tape too not just the eBay Max Power specials. Some people detest exhaust wrap for various reasons however.
James
I've seen various reflective films that can be applied but have no experience of them as the vehicles I've worked on have had aluminium bonnets mainly.
A different approach - are you intending to use exhaust wrap on your exhaust manifold. I've had good results reducing underbonnet temperatures on sevens with wrap. If your thinking of doing it - it's worth getting a decent quality tape too not just the eBay Max Power specials. Some people detest exhaust wrap for various reasons however.
James
Seabass said:
I've just looked at your profile - paint looks great.
I've seen various reflective films that can be applied but have no experience of them as the vehicles I've worked on have had aluminium bonnets mainly.
A different approach - are you intending to use exhaust wrap on your exhaust manifold. I've had good results reducing underbonnet temperatures on sevens with wrap. If your thinking of doing it - it's worth getting a decent quality tape too not just the eBay Max Power specials. Some people detest exhaust wrap for various reasons however.
James
Decent heat wrap will reduce underbonnet temperatures, however it will also kill your exhaust manifold over time. The increased heat changes the structure of the steel to become almost like glass and it flakes off, eventually causing it to go very brittle and the welds to fail. For me paint is cheaper than a new manifold every two years - and I've not had a paint problem on several cars with fibreglas bonnets and decent wrap will cost you £50 - £70I've seen various reflective films that can be applied but have no experience of them as the vehicles I've worked on have had aluminium bonnets mainly.
A different approach - are you intending to use exhaust wrap on your exhaust manifold. I've had good results reducing underbonnet temperatures on sevens with wrap. If your thinking of doing it - it's worth getting a decent quality tape too not just the eBay Max Power specials. Some people detest exhaust wrap for various reasons however.
James
R
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