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200 Series General Forum for the Volvo 240 and 260 cars |
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New (to me) 1980 Volvo 244Views : 2026107 Replies : 4092Users Viewing This Thread : |
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Feb 23rd, 2020, 15:26 | #211 |
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Quote:~ " so I'll do the system flush and fit the new thermostat I have (maybe the PO knew it needed one after all?)"
Central heating descaler/cleaner is ideal for this purpose:~ mixed metals are safe (I use this on cast iron & aluminium) far better that the car shop radiator cleaners- just follow the instruction. Bob. |
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Feb 23rd, 2020, 15:52 | #212 | |
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Feb 23rd, 2020, 17:07 | #213 |
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I fitted an electric fan to Olaf that came off a 1980 FWD Toyota with a set of fabricated metal brackets; the late 940 Turbos have an electric fan that can be "persuaded" to fit by cutting up the plastic shroud (the 940 rad is wider), which is what SFSS has fitted. Be warned though: the 940 fan is EXTREMELY efficient, cutting the temp down in seconds but it needs a 35-amp fuse on the output side of the relay.
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Feb 23rd, 2020, 17:52 | #214 | |
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https://www.ebay.co.uk/itm/Car-Truck...QAAOSwCH9bc-PH It would need some sort of control system as well. I'm guessing there might be later 240s with an electo-magnetic clutch that might be an easier fit? The Royal Barge's fixed fan does look a bit tractoresque - a reminder of how things used to be. :-) |
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Feb 23rd, 2020, 18:01 | #215 | |
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I wonder whether this viscous coupling would be a good modification, and perhaps quite easy to fit, what do you think? https://www.ebay.co.uk/itm/183405201197 Alan |
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Feb 23rd, 2020, 19:57 | #216 | |||
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https://www.ebay.co.uk/itm/Universal...t/223768784458 Control system is easy enough, +ve feed from the battery through a 30A fuse to terminal 30 on a standard 4-pin relay, terminal 87 to +ve on the fan motor. Terminal 86 feed from ignition +ve and take terminal 85 to a thermoswitch. This could be mounted in the radiator if there is a hole for it or in a coolant hose adaptor. You'd need a 97-92C switch. Other temrinal on the switch goes to a good earth. Quote:
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Feb 23rd, 2020, 20:21 | #217 | |
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Feb 23rd, 2020, 21:19 | #218 |
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If you also measure the diameter fo the top hose stub on the rad, i think i have an alloy coolant hose sensor adaptor and switch that i bought for my 740 and never fitted. WOn't fit my 760 (too small bore i believe) so is surplus to requirements. Fairly sure the switch is 97-92C as well so right on the temperature rating.
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Feb 23rd, 2020, 23:24 | #219 |
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If you decide to go for an electric fan, a 940 one can be cut down on one side to fit the 240 radiator very easily and neatly - I have one in my car.
If your radiator was replaced at some point, it might have a bung for a temp sensor at the top on the back of the offside- ie near the drivers side headlight. If it does, an intermotor 50050 temp switch will fit and control the fan to come on at just slightly over horizontal on the gauge. The reason for the bung is that some 740 (or 940? Not quite sure) cars use the same size radiator and have an temp switch in that position- as far as I’m aware no 240s had electric fans from new, just the fixed fans like yours and then later the fans with a viscous coupling. Cheers |
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Feb 24th, 2020, 00:32 | #220 | |
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To explain the "97-92C" the switch makes at 97C and breaks at 92C so it doesn't come on until the temperature is 5C above the 92C 'stat, fan runs then switches off when it's dropped the temperature to 92C. There is a "hotter" version of the switch, i'll have a look and try to find the number later. I'll also dig out the coolant hose sensor adaptor and switch i have tomorrow.
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