fan clutch woes?

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fan clutch woes?
Stumpt 5 May 2005 08:18:41
	I have a cooling problem which (seems to have) started with a busted bypass hose on my 87gt 5 liter. I replaced the hose, refilled coolant and still had the problem so I replaced the thermostat. The problem continued, and since it only seems to occur under a load, I replaced the fan clutch. The fan would easily spin by hand after I shut the car off right before it was about to overheat. The new fan clutch does the same exact thing! According to what I've read in postings from this group, is that not supposed to happen? Thanks for your help!
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Big Al 5 May 2005 10:10:35 [ permanent link ]
	"stumpt" <stumpt@problem.com> wrote in message news:c97j719lutv22l1i7m0iuo85gh82naub25@4ax.com...>I have a cooling problem which (seems to have) started with a busted> bypass hose on my 87gt 5 liter. I replaced the hose, refilled coolant> and still had the problem so I replaced the thermostat.> The problem continued, and since it only seems to occur under a load,> I replaced the fan clutch. The fan would easily spin by hand after I> shut the car off right before it was about to overheat. The new fan> clutch does the same exact thing! According to what I've read in> postings from this group, is that not supposed to happen?> Thanks for your help! The clutch fan relies on a hot radiator to lock up. If the engine is overheating and the radiator is not hot you have different problems. I would suspect the thermostat, but you say you changed it. Drive it so it gets hot and go feel how hot the air is coming out of the radiator. 200 degree air is very hot Al
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Stumpt 6 May 2005 00:43:26 [ permanent link ]
	On Wed, 4 May 2005 23:10:35 -0700, "Big Al" <nospamsal1@qwest.net> wrote: "stumpt" <stumpt@problem.com> wrote in message >news:c97j719lutv22l1i7m0iuo85gh82naub25@4ax.com...>>I have a cooling problem which (seems to have) started with a busted>> bypass hose on my 87gt 5 liter. I replaced the hose, refilled coolant>> and still had the problem so I replaced the thermostat.>> The problem continued, and since it only seems to occur under a load,>> I replaced the fan clutch. The fan would easily spin by hand after I>> shut the car off right before it was about to overheat. The new fan>> clutch does the same exact thing! According to what I've read in>> postings from this group, is that not supposed to happen?>> Thanks for your help!> The clutch fan relies on a hot radiator to lock up. If the engine is >overheating and the radiator is not hot you have different problems. I would >suspect the thermostat, but you say you changed it. Drive it so it gets hot >and go feel how hot the air is coming out of the radiator. 200 degree air is >very hot> Al Thanks for responding, Al. I thought the very same thing right after I posted. It seems you are correct, the radiator isnt really getting THAT hot, and the coolant in the overflow is almost to the top, it isnt going into the radiator. I've bought the following hoses to install, but I'm considering doing the water pump anyway: lower radiator hose (I think it's original) and the hose that goes from the overflow to the radiator filler (should there be a hose clamp for this hose?) Thanks for your time.>
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Guest 6 May 2005 02:56:56 [ permanent link ]
	On Thu, 05 May 2005 20:43:26 GMT, stumpt <stumpt@problem.com> wrote: On Wed, 4 May 2005 23:10:35 -0700, "Big Al" <nospamsal1@qwest.net>>wrote:> "stumpt" <stumpt@problem.com> wrote in message >>news:c97j719lutv22l1i7m0iuo85gh82naub25@4ax.com...>>>I have a cooling problem which (seems to have) started with a busted>>> bypass hose on my 87gt 5 liter. I replaced the hose, refilled coolant>>> and still had the problem so I replaced the thermostat.>>> The problem continued, and since it only seems to occur under a load,>>> I replaced the fan clutch. The fan would easily spin by hand after I>>> shut the car off right before it was about to overheat. The new fan>>> clutch does the same exact thing! According to what I've read in>>> postings from this group, is that not supposed to happen?>>> Thanks for your help!>> The clutch fan relies on a hot radiator to lock up. If the engine is >>overheating and the radiator is not hot you have different problems. I would >>suspect the thermostat, but you say you changed it. Drive it so it gets hot >>and go feel how hot the air is coming out of the radiator. 200 degree air is >>very hot>> Al > Thanks for responding, Al. I thought the very same thing right after>I posted. It seems you are correct, the radiator isnt really getting>THAT hot, and the coolant in the overflow is almost to the top, it>isnt going into the radiator.> I've bought the following hoses to install, but I'm considering doing>the water pump anyway: lower radiator hose (I think it's original) and>the hose that goes from the overflow to the radiator filler (should>there be a hose clamp for this hose?)> Thanks for your time.>> hey retard t stats can be fucked rite from the pakage one day i used 7...defective batch u prolly have an air lock you tard thats why i use a vacume filler hurc ast
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Stumpt 6 May 2005 04:07:35 [ permanent link ]
	Okay check this out... I removed the coolant overflow and changed the hose. The hose was caked up with 3 inches of crud. I also cleaned up the radiator cap. I let the engine warm up with cap off and verified that thermostat was open. Put the radiator cap back on and it wouldnt go above the 2nd mark on the temperature guage. Then I drove it for 25 minutes, and it wouldn't go above the 3rd line no matter what. There's wiring that goes to the top of the overflow bottle, could moving it have something to do with this? Was it just a gunked up radiator cap? Did I remove the 'airlock' you mention by letting it heat up first with the cap off? Did my hose initially burst because the cap wasnt venting properly? On Thu, 05 May 2005 22:56:56 GMT, sanfordm44356@syahoo.com wrote: On Thu, 05 May 2005 20:43:26 GMT, stumpt <stumpt@problem.com> wrote:> On Wed, 4 May 2005 23:10:35 -0700, "Big Al" <nospamsal1@qwest.net>>>wrote:>> "stumpt" <stumpt@problem.com> wrote in message >>>news:c97j719lutv22l1i7m0iuo85gh82naub25@4ax.com...>>>>I have a cooling problem which (seems to have) started with a busted>>>> bypass hose on my 87gt 5 liter. I replaced the hose, refilled coolant>>>> and still had the problem so I replaced the thermostat.>>>> The problem continued, and since it only seems to occur under a load,>>>> I replaced the fan clutch. The fan would easily spin by hand after I>>>> shut the car off right before it was about to overheat. The new fan>>>> clutch does the same exact thing! According to what I've read in>>>> postings from this group, is that not supposed to happen?>>>> Thanks for your help!>>> The clutch fan relies on a hot radiator to lock up. If the engine is >>>overheating and the radiator is not hot you have different problems. I would >>>suspect the thermostat, but you say you changed it. Drive it so it gets hot >>>and go feel how hot the air is coming out of the radiator. 200 degree air is >>>very hot>>> Al >> Thanks for responding, Al. I thought the very same thing right after>>I posted. It seems you are correct, the radiator isnt really getting>>THAT hot, and the coolant in the overflow is almost to the top, it>>isnt going into the radiator.>> I've bought the following hoses to install, but I'm considering doing>>the water pump anyway: lower radiator hose (I think it's original) and>>the hose that goes from the overflow to the radiator filler (should>>there be a hose clamp for this hose?)>> Thanks for your time.>>> hey retard>t stats can be fucked rite from the pakage>one day i used 7...defective batch>u prolly have an air lock you tard>thats why i use a vacume filler> hurc ast
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Big Al 6 May 2005 04:10:35 [ permanent link ]
	"stumpt" <stumpt@problem.com> wrote in message news:locl71tj62k6milpo3cl8pdtk9j6v6au3h@4ax.com...> Okay check this out...> I removed the coolant overflow and changed the hose. The hose was> caked up with 3 inches of crud. I also cleaned up the radiator cap.> Now is the time to flush the system and find out what made the crud. Was it brown? You may have a bad head gasket. Al
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Stumpt 6 May 2005 10:28:26 [ permanent link ]
	The crud was like a dark grey, reminiscent of the alumaseal I put in a long time ago; it was flushed a year ago On Thu, 5 May 2005 17:10:35 -0700, "Big Al" <nospamsal1@qwest.net> wrote: "stumpt" <stumpt@problem.com> wrote in message >news:locl71tj62k6milpo3cl8pdtk9j6v6au3h@4ax.com...>> Okay check this out...>> I removed the coolant overflow and changed the hose. The hose was>> caked up with 3 inches of crud. I also cleaned up the radiator cap.>> Now is the time to flush the system and find out what made the crud. Was it >brown? You may have a bad head gasket.> Al >
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Michael Johnson 6 May 2005 19:43:53 [ permanent link ]
	A few years ago I had a similar problem with my '89 LX. Over time scale precipitates out of the water and deposits at the low points in the cooling system. I found the same crud in the overflow reservoir and the bottom of the radiator. Flushing never fully eliminated the problem and I ended up buying a new radiator. The real test will be when you run the air conditioner on a hot summer day. If it doesn't over heat at that point then you likely solved the problem. You might have several of the cross cooling lines clogged with deposits which in turn doesn't let the fan clutch "see" enough heat to cause it to engage the fan properly. The best way to know if you have a problem is to find a garage that has a laser temperature gun and have them check the temperature of the radiator at different spots. If it shows there are cool and hot spots then you need to either have it cleaned or install a new one. stumpt wrote:> The crud was like a dark grey, reminiscent of the alumaseal I put in a> long time ago; it was flushed a year ago> On Thu, 5 May 2005 17:10:35 -0700, "Big Al" <nospamsal1@qwest.net>> wrote:> "stumpt" <stumpt@problem.com> wrote in message >>news:locl71tj62k6milpo3cl8pdtk9j6v6au3h@4ax.com...>> Okay check this out...>>> I removed the coolant overflow and changed the hose. The hose was>>>caked up with 3 inches of crud. I also cleaned up the radiator cap.>>> Now is the time to flush the system and find out what made the crud. Was it >>brown? You may have a bad head gasket.>> Al >>
		Add comment




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