brake servo heat shield

[tim wood]

Hi, I have a 4.2 series 1. I believe I should have a heat shield fitted to the engine frames to deflect heat from the area of the brake servo.
This isnt fitted, am i correct in saying this should be present?

Ive looked at those offered in stainless by one of the exhaust manufacturers but they only offer a top frame shield at extortionate prices.
Assuming I need one does anyone have a good source?

all help thankfully rec'd
tim

[chrisvine]

Tim,

I think the heatshield is needed to protect the servo. I was in the same dilemma and ended up fabricating my own heatshield, which isn't that difficult if you do it in aluminium. It's easy to cut and bend if not too thick, ie less than 3mm.

The original heatshield was fairly fragile but if you want dimensions then let me know.

Most heat transfer is by convection so a simple physical barrier would probably be sufficient to protect the servo. Hence why the aftermarket offerings are just metallic barriers.

Chris[/i]

[PeterCrespin]

Dave Kerr sells nice stainless ones with a modern safe asbestos-lookalike backing. There is a lot of radiant heat transfer, which increases with revs at c
at speed when convection is reduced due to air currents. Problems do tend to show up in hot slow traffic, however, especially on cars with multi-brancy headers.

Pete

[ChrisC]

I have just manufactured one in my last blog post tim. Easy enough to make and I can post up the dimensions if you are interested.

The shield that Pete mentions is fitted under the car between the silencer and the bodywork but I don't think that is what you are asking about.

[PeterCrespin]

I was talking about the servo heat shield as per the question, not the silencer heat shield or the one alongside the gearbox.

Pete

[ChrisC]

Okay Fair enough but Dave doesn't make those... Hence why I ending making it. Although to be fair he did bend the SS sheet for me

[Heuer]

He made mine, including insulation! SNG are now selling the original pattern plus brackets although I am not sure they have heat insulation material on them.

[ChrisC]

I suspect he can make anything if you ask him :D

[Dave K]

Hi, I have a 4.2 series 1. I believe I should have a heat shield fitted to the engine frames to deflect heat from the area of the brake servo.
This isnt fitted, am i correct in saying this should be present?

Ive looked at those offered in stainless by one of the exhaust manufacturers but they only offer a top frame shield at extortionate prices.
Assuming I need one does anyone have a good source?

all help thankfully rec'd
tim

Tim,

On LHD cars there are two heat shields one to protect the bottles and one to protect the servo. On RHD cars they don't require the top shield.

The top one is angled and the bottom one a rectangle. These are the only two I know of in this area.

I can supply either backed with ceramic material that has a lot higher heat deflecting properties than asbestos. Mine are extortionate as well at ?25 each!
If you want one drop me a PM me.

Dave

[Heronscourt]

Hi Dave, are you still making the heat shield which fits to the frames to protect the servo. I need the shield for a RHD series 1.5 roadster complete with heat absorbent material. The car was originally LHD and I have the heat shield for that but it’s in rough state and has the original asbestos material. While on the subject of heat shields do you have a recommendation for a waterproof heat absorbent material for the under body exhaust and gearbox heat shields, preferably with a strong self adhesive backing. The original was an asbestos material which had absorbed water and was falling apart.

[chrisfell]

No heat shield on my ‘67 2+2. Over 200,000 miles and not needed one yet.