If it’s an aftermarket fan then it might not draw as much current as the original Ford so you may be ok. Your wire being thicker than the fan wire is a good sign.
Is the fan blowing in the correct direction ?, it can be surprisingly difficult to tell if it’s blowing or sucking just by putting you hand in front of it as there’s a lot of turbulence. Best way it to hold a sheet of paper up in front of the rad and make sure it gets sucked onto it. Also, is the fan running in the correct direction, some people think you can reverse the power and put the fan on the other side of the rad, but this makes it a lot less efficient. A newly rebuilt engine might run a bit warmer for a while while it beds in but i would expect the stat to just open slightly sooner and the difference not to be noticeable on the gauge. Jim From: Chris Sent: Friday, May 13, 2016 10:34 AM To: [email protected] Subject: Re: [Quantum Owners] Overheating Ok, I’ll investigate the starter wire for the ignition switch (I thought that was the earth...hey ho). I used a 17 amp wire because it was the biggest I had plus it was bigger than the wire fitted to the fan (aftermarket). >The fan should only be coming on in slow moving or stationary traffic, if it's >overheating while moving it's something else. Any suggestions? The engine was rebuilt just over a year ago, when it was rebuilt before (11 years and 120,000 miles before) it also ran hot for a while then ran cooler as the years went by. Chris G From: Jim Hearne Sent: Thursday, May 12, 2016 7:12 PM To: [email protected] Subject: Re: [Quantum Owners] Overheating I hope you've fixed your problem, but.... The only earth wire from the starter is the great big black one from the engine block/starter to the battery. If that had a break in it i'd also expect you to have trouble with the battery charging and the engine cutting out. Also, the fan wouldn't normally be earthed to that point, though it is a Quantum so it's possible somebody did. If you have intermittent starting issues it's probably the starter wire from the ignition switch that has the problem (Black with a Blue stripe from memory), quite possibly it's the round push on fitting on the end if it's original or a crimp connector if not. The stud or tab on the starter is plated steel and rusts creating an intermittent connection. Also, 17 amp wire isn't really enough for the fan circuit, the fan is fused with a 20 amp fuse. I would use 27 to 30 amp (3mm squared) wire for the fan circuit The fan should only be coming on in slow moving or stationary traffic, if it's overheating while moving it's something else. Sorry, Jim On 12/05/2016 16:12, Chris wrote: My 1.6 saloon has been plagued by overheating problems for nearly a year. The Thermostat was playing up – so I changed it. The Fan switch was intermittent – see above. The Head gasket blew – bugger.....see above. The Fan switch plug disintegrated – ditto. The Fan was notchy – you get the idea.......... After all that it STILL overheated alot. Until I had a thought........ The Earth wire from the starter has a break in it (I know this), so that sometimes when I turn the key nothing happens and I have to pop the bonnet and wiggle the wire a bit, then try again. The Fans Earth connects to the same wire......Hmmm ‘If the Earth wire is dodgy between the Fan and the Battery, that would explain alot’ I now have a New 17 amp wire running from the Fan earth to the battery. Yesterday, for the first time in a long time, it Didn’t overheat. In fact, the needle didn’t even get halfway up the gauge! I’m currently touching every piece of wood in the house, hoping that I have now Finally fixed it........ Chris G No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6201 / Virus Database: 4568/12210 - Release Date: 05/11/16 -- -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. 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