Question about 1999 Saturn SL

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How do you replace the radiator hoses on a 1999 Saturn

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These hoses come with a factory clamp which can either be removed with slip joint pliers or a 5/16 socket or flat screwdriver. Once the clamps at both ends are removed then you should work the hose carefully off the fittings. It's sometimes useful just to use a razor knife to cut the hose off the fittings. ( be careful not to cut to deep and damage the plastic neck on the radiator. Once the hose is off just reverse the process, tighten clamps or replace clamps with new hose clamps, top off the radiator with proper coolant.

Posted on Jul 30, 2010

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Fairly simple once you have the clamps pulled back
assuming the hoses are seized to the pipes just split them with a razor blade and remove

regardless how much coolant is removed prior to service expect to spill more while removing

after installing hoses and refilling coolant make sure you leave the radiator cap off to bleed the system

Posted on Jul 30, 2010


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2 Answers

Where is the thermostat located on a 1999 Saturn SL?

  • 1

    Park the car on a level surface, turn off the engine and let the engine cool a minimum of 2 hours before beginning to remove and replace the thermostat.

  • 2

    Place the bucket under the driver's side corner of the radiator beneath the radiator draincock (located on the bottom of the radiator). Remove the filler cap from the radiator.

  • 3

    Shape a large piece of aluminum foil to form a funnel or channel from beneath the draincock to the bucket, Pinch high side walls in the aluminum foil so it will direct the flowing coolant into the bucket and not allow any to spill on the ground or into the engine.

  • 4

    Turn the draincock clockwise to open it and drain the coolant from your radiator and hoses. Close the draincock when you have finished draining the system.

  • 5

    Locate the thermostat housing. The housing will be on the top of the engine; you can find it easily no matter what model year Saturn you have, by following the main hose coming from the radiator to the engine block. That hose will end at the thermostat housing and there will be one or two houses coming off the housing as well. Disconnect the hoses from the housing.

  • 6

    Using your socket set, remove the bolts holding the thermostat housing in place. Put the tip of your paint scraper between the housing and the engine block and pry up gently to remove the housing. Once the housing is free, remove the gasket that was between the housing and the block. If necessary, use the paint scraper to scrape off any old gasket that is stuck to the metal.

  • 7

    Pull the old thermostat from its seat. The thermostat has a circular steel top with what looks like a raised handle. Simply lift the old thermostat out and place the new one into position.

  • 8

    Lay your new thermostat housing gasket into place and re-install the housing. Tighten the bolts down. Re-connect the hoses and refill your radiator with new coolan

  • Dec 03, 2010 | 1999 Saturn SL

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    Dec 05, 2008 | 1999 Saturn SL

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    No heat

    Sounds like you have a clogged heater core. Sometimes heater cores can be flushed, but more times than not, it has to be replaced. If you've replaced the thermostat and your lower radiator hose is always cold, chances are it is the heater core. Hope this helps! Have a great day!

    Nov 23, 2008 | 1999 Saturn SL

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