Adventures in engine cooling
#1
Adventures in engine cooling
So my fan clutch went bad, it has actually been bad for almost a year but luckily I have a DI and the DI cooling system is a very good system when working correctly.
But I knew my clutch needed to be replaced.
So I searched and I bought a brand new one from www.miamirovers.com for $80 with free shipping.
Put it on the truck and lo and behold they sent me a heavy duty fan clutch instead of the regular duty one.
So my fan ran all the time and was sucking horse power and MPG.
I am returning it to them.
So I went to AutoZone and bought a Land Rover fan clutch for $105.
It did not come with bolts and it actually would not fit the truck, the nut on the clutch that goes onto the water pump was to small.
So I returned it and bought this one.
http://www.autozone.com/autozone/par...er=197694_0_0_
It is $50, comes with new bolts and has a life time warranty.
The bolts for this clutch are a tad bigger than the Land Rover ones so I took a rasp and reamed out the holes on the fan to make them bigger.
Bolted on the new clutch, put it on the truck and started the engine to make sure the fan spun true.
Shut the engine off and put the fan shroud back and closed the hood.
Total time for removal and install 30 min.
Any fan clutch for a 2000 Chevrolet Express 1/2 ton with the 4.3L V6 with no a/c will work.
If you get one for a truck with a/c it will be heavy duty which means the fan will run more often.
AntiChrist has been using this type of fan clutch for years.
But I knew my clutch needed to be replaced.
So I searched and I bought a brand new one from www.miamirovers.com for $80 with free shipping.
Put it on the truck and lo and behold they sent me a heavy duty fan clutch instead of the regular duty one.
So my fan ran all the time and was sucking horse power and MPG.
I am returning it to them.
So I went to AutoZone and bought a Land Rover fan clutch for $105.
It did not come with bolts and it actually would not fit the truck, the nut on the clutch that goes onto the water pump was to small.
So I returned it and bought this one.
http://www.autozone.com/autozone/par...er=197694_0_0_
It is $50, comes with new bolts and has a life time warranty.
The bolts for this clutch are a tad bigger than the Land Rover ones so I took a rasp and reamed out the holes on the fan to make them bigger.
Bolted on the new clutch, put it on the truck and started the engine to make sure the fan spun true.
Shut the engine off and put the fan shroud back and closed the hood.
Total time for removal and install 30 min.
Any fan clutch for a 2000 Chevrolet Express 1/2 ton with the 4.3L V6 with no a/c will work.
If you get one for a truck with a/c it will be heavy duty which means the fan will run more often.
AntiChrist has been using this type of fan clutch for years.
#6
32 mm, a fan clutch tool will not work, you will need a actual 32mm wrench.
Or a crescent wrench that goes that big but yet has a small enough head that it will fit behind the water pump pulley.
Once the wrench is on smack it with a large hammer to the LEFT until it breaks loose and then spin it off by hand.
When you put the new one on spin it on by hand and then one wack with your hand on the wrench to the right to snug it.
Or a crescent wrench that goes that big but yet has a small enough head that it will fit behind the water pump pulley.
Once the wrench is on smack it with a large hammer to the LEFT until it breaks loose and then spin it off by hand.
When you put the new one on spin it on by hand and then one wack with your hand on the wrench to the right to snug it.
#8
#9
HOWEVER I have been thinking about this long and hard...the DI and DII use the EXACT same water pump but their fans are different as well as the fan clutch's.
But since the water pumps are the same that means the threads on the pump shaft (hehe, shaft) are the same and the only difference is the fan and clutch.
Why I dont know.
I also do not know how much clearance there is between the DII fan and radiator.
So they might use a different fan and clutch to save room, or maybe the DII fan pulls more air, again I do not know.
But here is a thought, the Chevy fan clutch is $50, a new fan for the same Chevy at AutoZone is $37.
So why cant a guy buy both and not make the holes bigger on the Rover fan and just bolt the Chevy clutch to the Chevy fan and screw the whole thing onto the Rover water pump?
Just a thought-Phil
So who wants to try it? If it does not work you could always return them.
#10
I figure in (2) seperate renditions of electric fan systems I've put over $150 and 16 man/hrs into my fans
It doesn't overheat, even in chicago traffic 90deg. (205 was the hottest, a/c on) but something tells me it'd be that good with the original fan & a new clutch.
I've convinced myself the waterpump is happier
nice post, spike
luck,greg
It doesn't overheat, even in chicago traffic 90deg. (205 was the hottest, a/c on) but something tells me it'd be that good with the original fan & a new clutch.
I've convinced myself the waterpump is happier
nice post, spike
luck,greg
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