Re: [DML] Re: Coolant system pressure check and vacuum routing.

[<delornut@xxxxxxxxxxxx>]

I just returned from a 5500 mile DeLorean trip up the west coast from
Eureka, Calif to Victoria, BC. Early this summer I went through the engine
and updated everything, water pump, hoses, ignition components and so on. I
used the silicone hoses in the 'valley of death '. Hose clamps have a
tendency to relax over time, probably because the compressed hose takes a
set and dosen't try to expand back .With time and heat rubber hoses adhere
to the metal surfaces and even if the clamp relaxes a bit they usually don't
leak. Silicone hoses don't adhere. I pressure tested everything before
reassembly. I drove the car to the Houston open house and then on the 5500
mile trip. During this last trip the alternator belt started squeeling every
once in a while. Finaly, about 50 miles from home, it broke. I had a spare
and soon was back on the road. but the engine temp kept creeping up and when
I stopped to check things out discovered the coolant was practicaly gone.
I've spent the last two days in the engine compartment and I discoverd the
hose clamps had relaxed and the large silicone hose on the back of the water
pump has been seeping. It apparently seeped out of the vally onto the fan
belt and the intermitant slipping finaly broke the belt. Now I'm wondering
if I should leave the silicone hoses or go back to rubber. Anyone have long
term experiance with silicone hoses under the intake?

Bruce Benson





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