I own a 245 1984 Volvo wagon and its overheating at high speeds and on hills. I replaced the water pump, the thermostat a blown head gasket due to high pressure in the hoses and also replaced upper and lower radiator hoses due to holes I flushed it with a fluid from oreillys and im not sure if it worked. Any suggestions
The radiator is very suspect. Just because water flows through it, doesn't mean that it's good. If regular water has been used to fill it in the past, minerals have probably built up enough gunk to impede the flow at higher speeds.
Replacement radiators aren't that expensive and you already replaced the water pump so THAT's not likely to be the culprit.
You might also want to check the engine oil level.
Are the radiator cooling fans working?
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Clothe pins on the lines will help disperse the heat. It sounds like you may have a cracked block. Do a compression test on your cylinders, it's possible that one or more of them are warped.
You said you flushed the radiator? Try adding black pepper to your radiator, it expands in the cracks, and could temporarily fix the problem until you can get it repaired. Approximately 1/4 tsp. at a time, until it works. Do not add too much. It works on leaky radiators as well.
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SOURCE: '90 Volvo 740 2.3l turbo water pump install instructons needed
Go to an auto supply store like PEP boys or Advance Auto, etc., and buy a Haynes Repair Manual for the 740. You may be able to consult one at your local library for free. Even if it doesn't cover your model year, the replacement instructions are pretty much the same for all years. in fact even a 240 Volvo manual would be essentially the same. Pay particular attention to the installation instructions....you have to slide the pump on, and then rotate it a few degrees clockwise to make the upper o-ring seal. Good luck!
SOURCE: 1996 Volvo 850 overheating
Is there any oil in the water or mayonnaise under the oil filler cap? If so, I'm afraid you probably have a blown head gasket. The hole being blown in a hose is symptomatic of that I'm afraid. As I've posted elsewhere, if it's a T5 then it's much, much easier to get a secondhand engine & change it over rather than change the gasket (in any case, it can turn out to be a damaged head rather than/as well as the gasket).
If not then check the water pump itself.
To check the radiator, disconnect the top & bottom hoses; connect a garden hose to the bottom hose (gaffer tape is your friend :) and turn on the tap. Pretty obviously, if water doesn't gush from the top outlet, you have a blockage - try more water pressure (not a pressure washer!), you may clear it :)
SOURCE: Power steering fluid leaks quickly out 1989 Volvo 740 GLE wagon
The most obvious places are the Power steering rack itself - at each end, and the hoses that are attatched to it.
A leak at the pump is easily spotted.
Hoses are cheaper to replace than seals on the rack (which may require a new unit)
SOURCE: 1984 volvo 240 gl wagon engine kill
Check for vacuum leaks,pull off your intake hose and look for small cracks,also go to the rear of car and listen for you intank fuel pump,needs to making an humming sound,no sound or intermediate this can be your problem.
SOURCE: 1994 940 volvo wagon non-turbo. How do I replace the fuel pump?
Under you car,just in front of the main fuel filter,why are you replacing it?
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