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Engine Specific Info and Questions => IDI Engine => Topic started by: BajaVWCamper on July 30, 2019, 08:37:45 am

Title: Radiator fan switch Temps.
Post by: BajaVWCamper on July 30, 2019, 08:37:45 am

Hi All,

I have noticed the 2nd speed of my radiator fan coming on more often that i feel it should. On a hill climb the other day i noticed that the 1st stage of the fan turns on just over the warning light of the gauge and 2nd stage at about 3/4 of the gauge. In This is on a Turbo Diesel 1.6TD JX engine 84 Vanagon.

After having a look at my fan thermoswitch i see its a 92-82/87-77 switch.

I suspect my thermostat is a stock 87C thermostat.

My question is should i get a higher temp 102-92/95-85 thermoswitch better? Or maybe a cooler thermostat?

I don't see any harm in having the engine run cooler of course but i don't wanna burn out my fan by having it run full blast like a plane about to take off every time the engine gets a little hot.

Thanks!

Title: Re: Radiator fan switch Temps.
Post by: ORCoaster on July 31, 2019, 11:08:56 pm

I would opt for the higher fan switch over the lower thermostat.  Diesels like it warm in the winter and summer actually.  Better to go that way then a low thermos and have it open too much in the winter and fall giving you poor mileage.  I run a 93 degree stat in mine that's C not F by the way.  But I am on the Oregon coast and temps hover around 50 a lot so it is necessary to have heat on for defroster time on those mornings.