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Topic: Overheating Still A Problem! (Read 1822 times) |
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DJWerkz
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OK, changed the thermostat and header tank cap for new OEM Ford parts, made sure the system is properly bled and was still having overheating problems when in traffic.
Another member recommended changing the CAT's as I knew mine were shot and got a pair which I was told only had 30,000 miles on them but to be honest they look original (was told they were new replacements 30k ago).
Car still runs very hot when stuck in traffic, in fact temperature needle shoots from normal operating position right up just about to touch the red!
If I rev the car then the needle will go down.
I have already had to have the rad repaired once due to system over-pressurisation, if it keeps running hot like this I can see I will not have a rad,...or a few other things left!!
Can anyone help on this? I want to get Bill Field to take a look at it but he's so busy at the moment it's proving difficult to get hold of him.
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TiberiuS
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Ex. 1996 2.3 Ultima - RIP P789 KHJ
 
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Re: Overheating Still A Problem!
« Reply #1 on: Jun 23rd, 2007, 8:35pm » |
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Hi. Water pump? Have you checked the condition of the impeller? Could've lost an impeller blade and it's restricting flow somewhere? 
Fans cutting in?
Regards, Bruce.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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Matt
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Re: Overheating Still A Problem!
« Reply #2 on: Jun 23rd, 2007, 8:39pm » |
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hey
Quote: If I rev the car then the needle will go down.
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could this be the water pump failing to circulate the coolant properly?
other then that, could it be the temp sensor has past its best?
im not that wise on the cooling systems of the scorpio, my cossie has left me baffled at times lol
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FDS2000 Scans - Birmingham
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Matt
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Re: Overheating Still A Problem!
« Reply #3 on: Jun 23rd, 2007, 8:40pm » |
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d**n u bruce, beat me to it bah 
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FDS2000 Scans - Birmingham
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TiberiuS
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Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: Overheating Still A Problem!
« Reply #4 on: Jun 23rd, 2007, 8:49pm » |
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on Jun 23rd, 2007, 8:40pm, Matt wrote:| d**n u bruce, beat me to it bah |
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I know, spending too much time on the computer lately 
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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DJWerkz
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Re: Overheating Still A Problem!
« Reply #6 on: Jun 24th, 2007, 4:56pm » |
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Fans work fine, they cut in soon as the needle shoots up.
When I do rev the engine for a few seconds (continuous), or manage to drive off the temp guage almost drops down to normal position, but sometimes it does still register quite high on the scale.
If I were to remove the water pump, could I tell from a visual inspection whether it's this causing the problem? Particularly should there not be a blade missing from the impeller what else am I looking for?
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: Overheating Still A Problem!
« Reply #7 on: Jun 24th, 2007, 7:53pm » |
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If the impellor blades are broken up then this will be pretty evident, plus you'd have bits of metal flowing around the cooling system.
If the blades are intact then check the edges, they should be right angled. If they are rounded off then this can cause bad circulation.
Finally, hold the pulley end firm & try to turn the impellor. If the impellor turns, then it has lost its grip on the spindle...this will deffinately cause bad circulation.
HTH 
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DJWerkz
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Re: Overheating Still A Problem!
« Reply #8 on: Jun 25th, 2007, 11:27am » |
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Spoke to Bill Field this morning at Powercraft Engineering and he is not convinced it's a water pump problem.
He has asked me to make sure that the small fan is coming on otherwise if there is a faulty sensor which is only causing the fans to both come on when the temp gets real high then this could be the source of my problem. Will be making some checks this afternoon.
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DJWerkz
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Re: Overheating Still A Problem!
« Reply #9 on: Jun 27th, 2007, 11:25pm » |
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Ran some checks and the only time the fans come on is both at full power when temp guage is at the end of the white scale before heading into red.
Now, from what STN told me compared to the 'How To' web site I am a little confused on exactly what is supposed to happen and when!
Is the smaller of the two fans meant to come on at mid operating mode or both at a slow speed?
I should add that my AC system is currently empty and therefore not operational, hope that is not a factor in all this.
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Jonnycab
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Re: Overheating Still A Problem!
« Reply #10 on: Jun 27th, 2007, 11:34pm » |
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My air-con is currently empty, but both my fans still come on at slow speed & the temp guage is always slap bang in the middle & the dash temp readings are always within the specified range (79-129)
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DJWerkz
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Re: Overheating Still A Problem!
« Reply #11 on: Jun 27th, 2007, 11:42pm » |
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This seems to be my problem then, no slow fan speed operation. Will have to check out the wiring harness, relay, fuses and the ECT thingy, whatever it's called lol.
More work!!
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Jonnycab
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Re: Overheating Still A Problem!
« Reply #12 on: Jun 28th, 2007, 12:12am » |
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Keeps your mind active & stops you going senile....might drive you insane though 
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DJWerkz
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Re: Overheating Still A Problem!
« Reply #13 on: Jul 1st, 2007, 12:27am » |
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Thought I would report in
STN had told me to check the green covered relay behind the drivers headlamp.. He said to remove the green plastic cover and press each contact to see if they engage the fans.
When each contact is pressed either the smaller fan comes on on low speed or both come on on low speed. Reported this back to STN and he said that this means the relay is OK so my problem lies in the loom or maybe with the coolant temp sensor.
However, since connecting everything back up I now find the car will not start!! 
It just keeps turning over but not firing up. Informed STN and he feels there must be a loom fault somewhere in the bulkhead/behind drivers headlight as these two faults could be related to a loom issue.
Have not had time to do any more plus the rain has stopped me doing anything too. Will keep reporting back when I have more info. and hopefully a solution, but if you have anything valuable to input please feel free
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Highlander
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13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
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Re: Overheating Still A Problem!
« Reply #14 on: Jul 1st, 2007, 12:38pm » |
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Your EDIS unit is it that spot beside the green relay, under the front of the coolant reservoir. you might have disturbed the wiring/connector?
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on Oct 17th, 2011, 12:35pm, Simmo wrote:I give up ! Too much for an old boy!  |
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DJWerkz
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Re: Overheating Still A Problem!
« Reply #15 on: Jul 1st, 2007, 3:33pm » |
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Hi there,
Well we had some sun this afternoon so I had a good check through all the wiring and connectors in terms of making visual checks and also removed all connectors and re-connected everything. Alas, the car will not start.
Now I have no idea what to do. Have just left a message with STN on his mobile but it is Sunday afternoon so will not hear anything until during the week most likely.
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howiedintheplace
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Based near Evesham
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Re: Overheating Still A Problem!
« Reply #16 on: Jul 1st, 2007, 5:05pm » |
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Oh mate not again 
Gota be something to do with the edis module check the plug again.
Disconnect the battery for 30mins & also check you have not disturbed the crank sensor if you have been messing with the fans.
Cross your fingers & try to start it.
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Dave
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DJWerkz
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Re: Overheating Still A Problem!
« Reply #17 on: Jul 1st, 2007, 5:18pm » |
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Will try the battery disconnet in the morning see if that works. Where is the crank sensor?
I have not exactly really been messing with the fans. I have not removed them, the only thing I did to check they were work was do what Bill said and that was to depress each of the contacts on the fan relay.
The only thing I really did other than touch the fan relay was properly fit the little black vacuum canister that sits on the ABS unit. Bill had put a new one in for me when he had the car but he had just loose laid it in the car and not removed the old one. I removed the old canister and just bolted up the new one.
Can't understand why it's not working
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Matt
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Re: Overheating Still A Problem!
« Reply #18 on: Jul 1st, 2007, 5:34pm » |
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crank sensor is on the left hand side of the main crank pulley,
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FDS2000 Scans - Birmingham
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Highlander
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13 Scorpios, XR4x4, Suzuki SJ413 for off road :)
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Re: Overheating Still A Problem!
« Reply #19 on: Jul 1st, 2007, 5:52pm » |
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Just in case.....
Have you tried the fuel cut off?
Is there petrol in it?? (i've done it!)
PATS? locked the car then opened it again?
Assuming they are ok i would try wiggling the wires to the EDIS unit while someone operates the starter... Keeping all your bits out of the way of moving parts of course
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on Oct 17th, 2011, 12:35pm, Simmo wrote:| I give up ! Too much for an old boy! |
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