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Overheating

Last post 09-23-2011, 1:05 AM by brandonmillsap. 3 replies.
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  •  03-29-2007, 2:47 PM 5595

    Overheating

    Just a couple of things I figured out the hard way. First of all, on overheating: If the heater is on when the engine is running hot, and the condition of the heater valve is at all questionable, it is not advisable to turn off the valve. As long as the heater core is included in the coolant's flow, the car will run cooler, but if there is hot coolant in the heater core, and the valve is shut off, the coolant in the heater core will contract, while the coolant in the radiator expands. This can cause the heater valve to leak onto the distributor, shutting down the engine. The solution is to replace the valve, or install a distributor waterproofing kit, both of which are preferable to being towed home on the nicest day of the summer.

    Steve Close
    San Francisco, CA


    Working on automobiles is inherently dangerous. Moss Motors, Ltd. is not liable for injury or damage due to incorrect installation or use of their products. All products are sold with the understanding that the safe and proper installation and use of the products is the customer’s responsibility. Follow factory workshop manual procedures and instructions, but use current shop safety standards and common sense. Some tasks will require professional advice or services which Moss Motors cannot provide.

    If you have a specific comment or question and you'd like an immediate reply from Moss Tech Services, don't post here - please first email: BritishTechnicalSupport@mossmotors.com Please include the Title and Location of this tip if applicable.

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  •  03-29-2007, 2:47 PM 5596 in reply to 5595

    Re: Overheating

    Don't assume that removing the thermostat is going to help. More often than not it will make the problem worse. Thermostats, aside from limiting water flow to the radiator when the engine is cold, control how fast water goes through the radiator. This may not be a big deal with the car sitting still and the engine idling, but once you get going, the faster you go, the faster the water goes through the radiator. Unless you slow the water down, it does not lose enough heat as it goes through the radiator, and the car will overheat. If your car overheats, find out why and fix it. Sooner or later it will cost you money.

    Working on automobiles is inherently dangerous. Moss Motors, Ltd. is not liable for injury or damage due to incorrect installation or use of their products. All products are sold with the understanding that the safe and proper installation and use of the products is the customer’s responsibility. Follow factory workshop manual procedures and instructions, but use current shop safety standards and common sense. Some tasks will require professional advice or services which Moss Motors cannot provide.

    If you have a specific comment or question and you'd like an immediate reply from Moss Tech Services, don't post here - please first email: BritishTechnicalSupport@mossmotors.com Please include the Title and Location of this tip if applicable.

    Forum FAQs here.

    Filed under:
  •  03-29-2007, 2:48 PM 5597 in reply to 5596

    Re: Overheating

    Overheating may be caused by improper point gap, incorrect timing, a bad radiator cap, sludge in the cooling system, dragging brakes, loose fan belt, defective thermostat (or no thermostat), or no water in the system. Check these first if you have an overheating problem.

    Working on automobiles is inherently dangerous. Moss Motors, Ltd. is not liable for injury or damage due to incorrect installation or use of their products. All products are sold with the understanding that the safe and proper installation and use of the products is the customer’s responsibility. Follow factory workshop manual procedures and instructions, but use current shop safety standards and common sense. Some tasks will require professional advice or services which Moss Motors cannot provide.

    If you have a specific comment or question and you'd like an immediate reply from Moss Tech Services, don't post here - please first email: BritishTechnicalSupport@mossmotors.com Please include the Title and Location of this tip if applicable.

    Forum FAQs here.

  •  09-23-2011, 1:05 AM 26106 in reply to 5595

    Re: Overheating

    TechTipAdmin@Moss:

    Just a couple of things I figured out the hard way. First of all, on overheating: If the heater is on when the engine is running hot, and the condition of the heater valve is at all questionable, it is not advisable to turn off the valve. As long as the heater core is included in the coolant's flow, the car will run cooler, but if there is hot coolant in the heater core, and the valve is shut off, the coolant in the heater core will contract, while the coolant in the radiator expands. This can cause the heater valve to leak onto the distributor cap, shutting down the engine. The solution is to replace the valve, or install a distributor waterproofing kit, both of which are preferable to being towed home on the nicest day of the summer.

    Steve Close
    San Francisco, CA

     

    Sorry for the revival, but this post has provided me important information on overheating. Thanks for posting!