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Oldsmobile alero 1999 2.4 engine. changed thermostat and now its leaking around the thermostat

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  • Cars & Trucks Master
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You also need to be certain that the mating surfaces of the head and thermostat housing are absolutely clean and flat. I use denatured alcohol after gasket removal to make sure there are no oil or coolant residuals on the surfaces.

Posted on Nov 29, 2014

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  • Master
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U need to reseal thermostat housing with a permatex sealer and new gasket and also check end of hose going into thermo housing for damage or replace hose

Posted on Nov 29, 2014

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Posted on Jan 02, 2017

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SOURCE: how to change antifreeze in a 2002 oldsmobile alero

below radioator or side low should b plastic plug which u can unscrew & emty the fluid

Posted on Dec 18, 2008

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SOURCE: 1999 oldsmobile alero the traction and cruise not working

use a scanner to check the abs system . most of the time the abs brakes and traction control system work together. your cruise control . unit has a servo motor .in front right fender well. check the fuse and relay also the cruise control brake release switch. and the brake light switch.if all is good you have a cruise control module problems. dealer ship job.

Posted on Apr 02, 2009

dennymulford
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SOURCE: My 1999 Oldsmobile Alero is leaking coolant from

sounds like the car is running a little hot cahnge the thermostat and make sure tha you electrict fan is for the radiator is working!!!!

Posted on Jun 17, 2009

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SOURCE: 1999 olds alero timing belt

2.4L engine dont have timing belt.it has a timing chain.fixing timing chain dont cost much.but the damage that occur when it broke.you probably got bent valves.damage piston heads.you can buy car if they dont charge arm and leg.you can repair timing chain your self for at least .$300.00.you have to buy timing chain.it come in a set.you get timing gears and tensioners.about.$190.00 and .$40.00 for timing cover gasket and seal.dealership going to charge you at least.$600.00 including labor.

Posted on Jun 27, 2009

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1 Answer

Oil leaking from bottom of engine from my 1999 oldsmobile alero


I'd start with replacing the Drain plug Gasket. Most conviniontly done with an oil change but you can do it without changing the oil also (Helps to have 2 people)
Also It could be leaking anywhere, (Gravity pulls it down to the bottom of the engine) Thats where I would start. They normally are around 50 cents (give or take) at your local parts place.

Mar 03, 2013 | 1999 Oldsmobile Alero

1 Answer

1999 olds alero leaking anti freeze, looks like the leak is coming from between the oil pan and transmission pan. had transmission changed leak seemed to start after that and has gotton worse. Does not...


CHECK HEATER PIPE OR HEATER HOSE AND CHECK COOLANT INLET PIPE FROM THE THERMOSTAT HOUSING. CHECK HEATER OUTLET HOSE FROM THE RADIATOR OUTLET PIPE.SOUND LIKE COOLANT LEAK COMING OFF TOP OF ENGINE.

Aug 13, 2011 | 1999 Oldsmobile Alero

1 Answer

Why my oldsmobile alero 1999 wont keep water in


CHECK FOR COOLANT LEAKS AROUND THE RADIATOR LOOK DOWN BETWEEN COOLING FANS AND RADIATOR SIDES FOR SIGNS OF ANTIFREEZE.CHECK ALL RADIATORS HOSES AND HEATER HOSES.IF ALL LOOK GOOD CHECK ENGINE OIL FOR COOLANT LEAKS.IF OIL LOOKS LIKE MILK SHAKE COOLANT LEAKING IN CRANK CASE.YOU HAVE A HEAD GASKET LEAK.YOU NEED TO CHANGE OIL + FILTER. GET THE HEAD GASKET FIX.BECAUSE LEAK IN THE CRANK CASE WILL LOCK UP THE ENGINE.IF CRANK CASE OIL LOOKS OKAY.YOU DONT HAVE THE COOLANT CORRECT MIXTURE.YOU SHOULD HAVE 50/50 ANTIFREEZE AND WATER.

Apr 23, 2011 | 1999 Oldsmobile Alero

1 Answer

Where is the thermostat located on my 1999 oldsmobile alero with a 2.4 engine


LOOK UNDER THE EXHAUST MANIFOLD HEAT SHIELD.YOU WILL SEE THERMOSTAT HOUSING WITH THE COOLANT INLET PIPE CONNECTED TO IT.

Feb 18, 2011 | 1999 Oldsmobile Alero

2 Answers

My 1999 Alero must have a leak somewhere because the thermostat gauge rises every few days. I put coolant in it at least 1 a week. I had a new water pump and thermostat put on it, but it is still...


CHECK AROUND WATER PUMP AREA.AND THERMOSTAT HOUSING FOR LEAKS.THE MECHANIC WHO PUT THE WATER PUMP ON MAY FORGOT TO PUT SEALANT ON BOTH SIDES OF THE WATER PUMP GASKET CAUSING LEAKS.LOOK AROUND THERMOSTAT HOUSING FOR LEAKING.IF THERMOSTAT SEAL WAS DAMAGE DURING INSTALLATION IT WILL CAUSE LEAKING.IF ALL LOOKS GOOD CHECK FOR COOLANT LEAKS AROUND RADIATOR .CHECK RADIATOR TOP AND BOTTOM HOSES FOR LEAKS AND CHECK HEATER PIPES AND HEATER CORES HOSES FOR LEAKS.IF ALL HOSES GOOD.CHECK FOR LEAKING CORE PLUGS.

Sep 26, 2010 | 1999 Oldsmobile Alero

1 Answer

I have a leak between the thermostat housing and the engine. Would that be a gasket?


COULD BE THERMOSTAT O- RING OR GASKET DEPEND WHICH VECHICLE TALKING ABOUT.SOME TIMES THE HOSE WILL LEAK MAKING IT LOOK LIKE THERMOSTAT HOUSING GASKET LEAKING.

Jun 22, 2010 | 1999 Oldsmobile Alero

2 Answers

My 1999 alero is overheating and engine coolant is leaking


hi, i dont know about the dipstick, but your overheating problem is most likely to be the thermostat...sounds like its stuck in the closed position,not allowing colder water to circulate, hence the overheating.......needs changing

Jul 27, 2009 | 1999 Oldsmobile Alero

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