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Old 06-14-2009, 07:48 PM
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Question replace waterpump

i need to replace the fan clutch and discovered the pump was wobbly so i"m gonna replace the pump while i'm under the hood. its been a long time since ive done this ( 74' pontiac lemans 350). anyway how do i stop the pump from turning when i try to remove the fan clutch? also will the shroud have to come off?
Thanks, Ed
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Old 11-02-2009, 06:52 PM
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Now, like any sane person, I went and got an estimate on getting someone who knew what the hell they were doing to replace the water pump, from my friendly neighborhood eccentric Saab mechanic. He quoted me two hours labor ($160) plus the pump ($129) and coolant ($35.) Total cost: about $325, give or take. Me being a notorious cheapskate, as well as being somewhat mechanically inclined, decided I’d look into what’s involved in replacing it yourself. This turned into a two-day long project that drained every ounce of energy from my mortal coil.
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Old 01-20-2010, 12:23 AM
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“Step 1: Remove the belt off the AC compressor. Remove or loosen the 4 10mm bolts in the water pump pulley.
Step 2: Remove the alternator belts. You will want to remove the 18mm nut on the back of the alternator adjusting screw and remove the adjusting screw to pull the alternator over to the compressor bracket to facilitate removal of the belts.
Step 3: Now that you have the belts and pulley off, remove the 6 12mm bolts from the water pump and push down on it from the top to remove. There are guys that say removing the compressor makes this job easier and they would be correct. I just use a razor blade and a mirror with a light. I remove the old gasket that way. Be careful if you decide to use a wiz wheel as you can groove the timing cover when trying to clean the gasket.
Step 4: I use copper gasket spray to make the water pump gasket seal to the water pump and timing cover.
Step 5: Refit in reverse order.”
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Old 01-31-2010, 08:20 PM
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When you are replacing the water pump you should replace the timming belt as well.
Both together should be around 4 hours of work and separate are 4 hours each so you really should pay the extra 20-30 bucks(online) for the belt itself.
Try looking into proved franchise shops , they usually know their way around the engine.
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Old 02-09-2010, 07:55 PM
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Make sure the gasket surface is clean and dry before you apply the gasket sealer and gasket. Sometimes coolant will continue to leach out of the engine onto the gasket surface while your trying to install and torque the bolts down. That will keep the gasket compound from sealing properly and you'll end up with a leaking gasket and have to do the job all over again. One technique to prevent this is to make sure the engine is tipped backwards so that the coolant seeps back into the engine rather than out onto the gasket surface. You can jack up the passenger side of the vehicle if necessary to tip the engine backwards.
Your engine is not listed as an "interference" type engine which is damaged when the timing belt breaks (See Gates link below). However, the original equipment timing belt needs replacing every 60,000 miles. Now would be a good time to install a new one while you have the front of the engine accessible. Maybe you can buy a longer life belt now.
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