Engine bay fuel pipe heat shielding?

[Juddder]

I'm considering putting some heat shield on the two main fuel pipes that run through the middle of the engine bay on my 4.2 and wondered if anyone has done similar and had recommendations of what to use?

Currently the two pipes run below the fuel rail, which is fine, but in my mind must get hot when the engine is running so having some heat shielding on them sounds like a sensible thing to do

Example engine bay photo showing the pipes on a 4.5 with some old shielding at the end but again the new pipes non-shielded

[Supateg]

Pyro sleeve, I did this a couple of years back with std line, I think I will now upgrade to Teflon lined hose. BTW it cured vapour lock…

Not the prettiest being red oxide coloured…

Edit:
Also while i think on….once the sleeve is in then feeding new line through is a doddle….

Edited by Supateg on Friday 9th February 19:17

[ukkid35]

I really like this stuff, so easy to handle - HILFLEX-HRS

The receipt is from 2015, so it's lasted well

Edited by ukkid35 on Saturday 10th February 10:11

[Juddder]

Thanks Paul and thanks Supateg

Both look like great options - many thanks

Can you remember what size you ordered?

I think the fuel hose will be 7.9mm diameter so maybe the smallest at 10mm would work best

For fitting I guess it's easiest to disconnect the pipes at the fuel cooler (the metal thing near the front radiator) and then slide it over them from there?

[mrniceguy351]

I get why people do this, but me personally I won't be putting the heat shielding back on. Why?
-The fuel flowing through the line keeps it cool.
-Routing it properly in the first place to keep it away from the heat source makes more difference.
-You can't see the condition of the line when it's hidden by the heat shielding. Is it perished? Is it kinked?

[Juddder]

Yes interesting how there are often two schools of thought about things like this and I think both are valid to be honest

I now have teflon pipe with JIC fittings for the fuel pump and the fuel filter in the rear passenger arch after Paul (ukkid) taught me how to check the state of my fuel lines by pressure testing the system with the fuel pumps on but not starting the car and he noticed that my old pipes had gone to mush

So definitely another route to go would be that for the front too, but shielding just seems in my head better because of all the heat (*probably the best best would be teflon pipes and shielding)

[mrniceguy351]

Ok maybe I'll put a small strip directly above the exhaust! But the rest will be bare.

[FarmyardPants]

This is why braided fuel hose is generally thought of as a bad idea.

I suppose one could use alternating, overlapping sections of two different diameter wraps, then you could slide a piece out the way to inspect the hose within.

[ukkid35]

Juddder said:

Can you remember what size you ordered?

I think the fuel hose will be 7.9mm diameter so maybe the smallest at 10mm would work best

16mm and 20mm will deal with most places

10mm is useful for some sensor wires, such as the CPS, as long as you de-pin the plugs in order to fit

[Juddder]

Perfect - thanks Paul - yes 7.9mm is the internal diameter so the external is circa 15mm so 16 or 20mm makes perfect sense