heat from headers

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narfire
Posts: 3959
Joined: Sat Dec 27, 2008 2:14 am
Your car is a: 1980 124 spider
Location: Naramata B.C.

heat from headers

Post by narfire »

Hi there. Recently installed a set of Ansa headers,sorry Mark the cdn dollar sucks at the moment,(need another 30%) :( took the cat out as well.
Question is.. will the heat from the header pipe melt the heater hose near the firewall? Last thing I need is for it to blow while on a trip.They have been ceramic coated but still get freeking hot.
After 20 minutes the rubber hose is hot but on extended trips,1-4 hours ???
There does not seem to be any room in there to fashion a shield that might offer some insulation, this engine for whatever reason is very close to the firewall.
Thanks
Chris
80 FI spider
72 work in progress
2017 Golf R ( APR Stg. 1)
2018 F350 crew long box
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manoa matt
Posts: 3442
Joined: Thu Oct 26, 2006 4:28 pm
Your car is a: 1978 Fiat 124 Spider 1800
Location: Honolulu, Hawaii

Re: heat from headers

Post by manoa matt »

I wrapped that hose as it comes off the heater tube with header wrap to insulate it. You could switch the hose out to a silicone one. I also shifted the rad overflow bottle from the firewall to the PS fender and up an inch to get it farther away from the headers, however it still looks like it's in the stock location. Keep it 3/4 full with coolant and it won't melt.
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kilrwail
Posts: 1100
Joined: Wed Mar 04, 2009 6:49 am
Your car is a: 1978 Fiat 124 Sport Spider
Location: Perth, Ontario

Re: heat from headers

Post by kilrwail »

I would also be concerned about the effects of that intense heat on your main ignition wire. They will break down over time.
_____________________________________________________________
Peter Brownhill

1978 Fiat 124 Sport Spider - original owner
1977 Porsche 911S - track car
2022 Ram 4 x 4 - hauler
PCA National Instructor and Motorsport Safety Foundation Level 2 Instructor
mbouse

Re: heat from headers

Post by mbouse »

heater hose would be minor compared to the eventual damage caused to the distributor, and most likely the overflow bottle.

ceramic coat the header....
narfire
Posts: 3959
Joined: Sat Dec 27, 2008 2:14 am
Your car is a: 1980 124 spider
Location: Naramata B.C.

Re: heat from headers

Post by narfire »

It has been ceramic coated including the down pipe and the cat bypass. I'll get some tape tomorow and wrap the hose up and the wires running next to the firewall.The ignition wire from the dist. should be ok,it's routed up high.
When the weather gets warm again next week I'll try driving it for a bit longer.
80 FI spider
72 work in progress
2017 Golf R ( APR Stg. 1)
2018 F350 crew long box
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