Need to insulate a small harness from headers

[SSLance]

I've got a small harness with wires that run to the temp sensor, knock sensor, and oil pressure sender in it that runs very close to my driver side header near the oil filter. I can't seem to come up with a way to secure it to the block to hold it in place but in most cases it stays away from the header and does okay.


Over the past year the plastic sheathing it is in has melted away in a section about 2" long where it is closest to the header, but the wires themselves did not get damaged.


I'm trying to come up with a solution to wrap around the harness to protect the wires from the heat but am coming up empty. There really isn't any other way to route it as everything it connects to is also under the header. I can put new sheathing over it again and hope for the best maybe even adding a layer or two of electrical tape, but would like to try something a bit more permanent.


Any suggestions?


Something like the metal tube on the passenger side for the wires coming off of the starter would be great, but there is nothing to attach it to to hold it in place that I can see.




What I'd like is some sort of insulating tape that I could wrap the harness up in...is there such a thing?

[Schwartz Performance]

Go on summit and search heat tape or wrap. There are several companies that make just what you need. One common brand is DEI, they make a lot of heat insulation products.

-Dale

[SSLance]

Thanks Dale, I'll give that a shot. Wonder if O'Reillys has anything? Would like to put this back together today.

[SSLance]

I think this is the ticket...



Design Engineering - Heat Sheath
Part Number: 010403
Line: DES
30 Day Limited Warranty
UPC: 607078104038
3/4 Inch Inside Diameter
3 Foot Length
Silver
Glass Fiber With Aluminized Reflective Foil
2,000 Degree Indirect Heat Rating
Heat Rating-Direct: 500 degrees
Heat Rating-Indirect: 2000 degrees
Detailed Description
Heat Sheath is made from a Hi-Temp fiberglass fabric bonded to an aluminized material then sewn into a tube. Designed to slide over wires and hoses this product can be easily shaped to fit the tightest bends. The Heat Sheath will reflect up to 90 Percent of the radiant heat and can insulate against up to 500 degrees direct continuous heat. Easily cut to length with scissors or a sharp knife.
Five popular diameters to choose from
Reflects heat from wiring and hoses
Easily cut to length


Thanks!!

[LS1-IROC]

I had a similar situation. I ended using a rubber lined steel clamp and used one of the bell housing bolts to secure it away from the exhaust.

[Zspoiler]

There is an insulating high heat hose ( I believe its Earls) and Some Adel Clamps. Use Braided line where you can.Check you local Speed Shops.And or Aircraft supplies Stores.

[SSLance]

Here is what happened to the last harness that was in the place



Thankfully the wires inside it were untouched.

This is the one I was most concerned about, the oil pressure sender circuit.



The rest of the harness that goes forward under the header, now protected by the DEI loom and cool tape.



I was able to form the shielding to aim it away from the header and I'm certain it'll work great now.

I knew it was close before and I watched it all season long, only near the end of the year did it finally melt a hole through the casing. I feel a lot better about how it is now.