<<<<Subject: Re: Insulating fuel lines
Date: Tue, 12 Mar 2002 00:01:54 +0000
From: Graham Singleton <grasingleton@avnet.co.uk>
The one place where the insulation is required as well as fireproofing
is the oil return from the crankcase. The hose will tend to harden and
crack if it gets regularly cooked, which it will if not protected.
Graham>>>>>
Based on correspondence some time ago on this subject, I installed a
heat shield made out of the light gauge stainless heat shield material
supplied in the kit. (I used Graham's phenolic firewall.) The shield
extends horizontally between the engine and the silencer over the bottom
area of the crankcase and is supported at the front end by a bracket
mounted to the two unused tapped holes at the bottom corners of the
crankcase. At the rear end, I secured it to the engine mounting frame
with Adel clamps. The shield has two diagonal creases to stiffen and
prevent "oil canning" and is shaped basically to prevent radiation and
convection from the silencer to the oil hose and the crankcase. Since I
only have about 50 hours run time on my engine I cannot say how
effective it is but it is definitely not doing any harm and it minimises
heat soak to the oil return hose from the silencer after shut down.
Cheers, John
|