The belt causes very little drag, even if the bearings aren't in the best condition it's not going to be that big. My guess is it's more about the heat load, the A/C removes heat from the interior and dumps it in front of the radiator. My condenser temp is often 150F, so significant heat load.
i would agree with you except for the results. since i don't use the ac on hills i can attest that just the belt drag, with or without bearing or clutch damage, was affecting engine temp or else something else has happened.
tools r us said:
None of this should be an issue for a properly functioning cooling system. They can climb 7% grades for miles, with the A/C running at max, in triple digit temps without issue.
What years did the blue clutch fan come on LC's? Is that the best clutch? What would be different if I did this with my 95 Clutch Fan? I'm in NY so we have winter ans summer. Sometime in the same day.
They can be purchased from any Toyota dealer. I stock them. There are some internal differences. It is difficult to describe. You would need to see them opened-up side by side.
I have an odd question. I have a LJ78 and changed the oil in it as has been discussed in this post with 10K oil. At first it was locking up beautifully, and now it has quit with no signs of leakage. The truck has 220K Kms on it so the clutch is pretty old. Do these things ever wear out, or do you just change the oil? I imagine the thermostat goes out, but would the clutch ever have to be replaced for another reason?
I have an odd question. I have a LJ78 and changed the oil in it as has been discussed in this post with 10K oil. At first it was locking up beautifully, and now it has quit with no signs of leakage. The truck has 220K Kms on it so the clutch is pretty old. Do these things ever wear out, or do you just change the oil? I imagine the thermostat goes out, but would the clutch ever have to be replaced for another reason?
The clutch locks up due to the magic of of the oil shearing. If it is no longer locking up, then either the oil has lost it's shear properties (IE: worn out) or it's leaked out or something odd is wrong (maybe the adjustment screws didn't get tightened down enough and have slipped and closed it completely?).
I would open it up and check the fluid and internals first as it's easy and cheap.
I have an odd question. I have a LJ78 and changed the oil in it as has been discussed in this post with 10K oil. At first it was locking up beautifully, and now it has quit with no signs of leakage. The truck has 220K Kms on it so the clutch is pretty old. Do these things ever wear out, or do you just change the oil? I imagine the thermostat goes out, but would the clutch ever have to be replaced for another reason?
Overall they are very durable, long lasting, the hardware failure modes that I have seen: Most common is the bearing failing, ether becoming loose or locking up. Next is leakage, it's easy to spot, makes a mess, generally the fan is covered in goo. Last is the thermostat locking up, usually from rust, most common if run in rust prone areas.
By far the most common failure is the fluid degrading. The quality/purity of the fluid is important, what did you use?
Thanks guys for the replies. I don't see any evidence of leakage, but living on a tropical island is definitely a rust prone area. I'd give the thermostat a high probability of failing. Is it possible to just fill the thing up with a lot of fluid to lock it if the thermostat isn't opening, or is that not really an option?
The fluid I used was "Denso Siliconoil" and part number was a -10 number so I assumed it was likely 10K weight. I can't find any info on it anywhere here but it is what everyone uses here. However, that doesn't mean a thing... The fluid could definitely be a poor quality fluid, but it is Denso. I asked at our Toyota dealer and they just gave me blank stares and no info.
Average temperatures here are in the 90s year round. I just moved to an elevation of 3000' so it gets down to a chilly 70F in the mornings. I imagine the fan lives most of its life locked up as it's always driven on mountain roads and maybe sees 100kph once a week. My LJ78 is living the life it was designed to live! Slow, bad roads and mud everyday.
The biggie about the fluid is it's purity, for this application needs to be pure silicone. Lubricating silicone oils have a small percentage of silicone in them, don't work well or for long.
The thermostat is the spring on the front of the clutch. If the center shaft is turned, twisted and released, it should spring back to the original position. If stuck closed it wont allow the fluid out of the reservoir, the clutch wont work. Some have had luck twisting/lubing to free it up, probably a short term fix?
If overfilled the fluid will overflow the reservoir, the clutch all be on all of the time. This will work, with reduced fuel efficiency, but will cool well.
Great info. Thanks a bunch. I'll see if I can take the clutch off today and have a look at that spring. If it is broken, I found a Aisin fan clutch for $170 USD. It doesn't have a blue hub (presumably cause it isn't from Toyota), but looks to be the same and is for a 1991 FJ80 US version cruiser. Do you think this would work? It looks the same to me as the Aisin blue hub I have minus the blue... BTW our company headquarters is in McNeal, AZ - Near Bisbee. I see you're in Chandler...
Great info. Thanks a bunch. I'll see if I can take the clutch off today and have a look at that spring. If it is broken, I found a Aisin fan clutch for $170 USD. It doesn't have a blue hub (presumably cause it isn't from Toyota), but looks to be the same and is for a 1991 FJ80 US version cruiser. Do you think this would work? It looks the same to me as the Aisin blue hub I have minus the blue...
The Philippines is a wonderful country. I live on Mindanao in Bukidnon for now and will move to Palawan in July where its a tropical paradise. We are in the mountains now so it stays cooler than down at sea level. My wife and I are here as missionaries so we spent a year learning the language and studying the culture which has made our time so much more fun and allowed us to make some really neat friends. English is spoken everywhere here too and it is a pretty easy country to get around in as a foreigner. Great place to be!
I am a pilot and aircraft mechanic and fly a little Cessna 185 in and out of jungle airstrips here to bring supplies to missionaries, and tribal clinics. It is a wonderful life and it is so great to spend it serving God and the Filipino people here who He loves so much. I also drive a Landcruiser LJ78 that is set up to take supplies in and out of some of the locations that are accessible by logging roads. Thanks for asking. If you ever come this way maybe I can help point you to some stuff to do. There is also an awesome off-road community here and a fantastic shop:
From your link it looks like a great place to live. You have access to all the right toys there, one gets the greatest satisfaction in helping people. All good!
Is there any problems with power outages in your area?
Do you have trouble getting parts from the US?
Also how good do those air bags work on your truck?
The biggie about the fluid is it's purity, for this application needs to be pure silicone. Lubricating silicone oils have a small percentage of silicone in them, don't work well or for long.
So are you saying that you no longer think the stuff from the Hobby store is any good? I swappped some in last summer and it's been good so far, but it hasn't had a real test yet.
If not, would you send me some of your stash for an appropriate deposit in your paypal account?
So are you saying that you no longer think the stuff from the Hobby store is any good? I swappped some in last summer and it's been good so far, but it hasn't had a real test yet.
If not, would you send me some of your stash for an appropriate deposit in your paypal account?
So far all of the hobby store brands that I have used have worked well. There is no easy way to test how pure they are, so the test has been function/durability in service and haven't seen a difference between hobby store and technical grade silicone fluids.
There are several lubricating brands of silicone (Super Lube, etc). These make great waterproof lubes, for wire connections, brakes, etc, but only have a small percentage of silicone and don't work in the clutches.
I only brought it up because bbpjunk used a fluid that I hadn't heard of, "Denso Siliconoil". Google didn't bring any useful info, so is it pure or diluted? That could be a reason that he didn't see the performance result that he was looking for?
area.
Check out the local forum:
