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I just had the head gaskets replaced due to an exhaust leak on the left side of the motor. Decided to install a new water pump, thermostat housing, plugs, wires along with all the gaskets to put it all back together. Now its overheating. Before I had the work done I had no other problems besides the exhaust leak. I don't know the reason for the overheating and I need help.

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  • Cars & Trucks Master
  • 1,249 Answers

Low on coolant or coolant leak? Air in cooling system? Take it back to the mechanic who did it before it needs more work. I just had the head gaskets replaced due to an - 25322543-21syibu3fgwpdxocjnkpw0ib-5-0.jpg

Posted on Dec 15, 2014

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Posted on Jan 02, 2017

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localwonder
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SOURCE: 2000 Sunfire coolant problem. Engine overheating,

ok, its time for a radiator flush. there is major sludge in the internals of this radiator. Make sure the thermostat is in the correct position as well. I've seen many cars come into my shop with the thermostat inserted backwards.

Posted on Mar 13, 2009

motor1258
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SOURCE: 2005 yukon denali is overheating

Start it cold with rad cap off, and heater on high heat, and let it run until you see increased flow in radiator, indicating thermostat opened & engine reached operating temperature. Rev engine slightly every once in a while and hold it there for 10-20 seconds, just to help purge air better/faster. Watch rad flow again, and wait until you see increased flow 3 or 4 times. Then top up coolant in rad to an inch or 2 from top of rad, and put cap back on. Top up return bottle to appropriate level on bottle & then try it again. If it still heats up, get back to me. Does it overheat at all times? Rad fan is good i take it?

Posted on Jul 18, 2009

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SOURCE: 2006 Dodge Magnum keeps overheating

Observe the car's engine as it runs for 10 minutes to ensure that the electric fan for the radiator is coming on, if not either the fan relay, fan's coolant temp. sensor, or the fan itself is bad, try the relay first it is the least expensive, if this is the type of vehicle that has no electric fan replace the clutch fan.

Posted on Jul 29, 2009

Kravcar
  • 192 Answers

SOURCE: 1993 Cadillac Eldorado overheating

I am assuming you have the Northstar engine.

Check for coolant flow at the Purge line,this is a common problem on the Northstar.
There is a small diameter hose coming from near the top of the coolant tank,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.If the hose is clear, check for blockage at the nipple on the tank.

Are you running it without a thermostat? If so,then strangely enough,this will cause overheating as the Northstar cooling system is different to most conventional systems and therefore will not help you diagnose the problem.

Posted on Aug 22, 2009

  • 264 Answers

SOURCE: 1995 BMW 525I over heating issue. I repaired head

Hi, Sounds like you have tried about everything. Ok the aux. coolant switch is for the electric pump for the heater core will not cause an over heating condition just a longer warm up of the heater core. Has the cooling system been bleed properly if there is a trapped air pocket it will not let coolant circulate. Was the new thermostat installed correctly? They have a vent that needs to be towards the top or they trap air on the back side and cant take an accurate reading to open and close. Other areas to look at would be proper operation of the fan clutch, if they fail they can cause the fan to not lock up properly and supply enough air movement through the radiator. The aux. electric fans and their temp switches do you hear them coming on are they coming on at the right temp.

Posted on Aug 26, 2010

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1 Answer

Water leak fro left side of engine


You might have either a blown head gasket or a crack in your engine block on that side of the motor. If you dont have any leaks from hoses, fittings or the water pump itself then mostly likely it is the head gasket, another way to confirm and make sure is to do an oil change, if there is chunky build up or sludge like discolorations due to coolant or water leaking into your oil then its the head gasket, and you'll need to definitely have it replaced or look into purchasing another vehicle. If theres no problems with your oil then its a leak from somewhere else. Possibley a heater hose or coolant line.

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I have a 2000 grand am I replaced the head baskets car runs great but it still runs hot heater want work and it leaks water from tail pipe help


If you're getting water out of the tail pipe, you could have a head gasket that is leaking coolant into an exhaust port. When you replaced the head gaskets, did you properly clean the gasket mating surfaces of both the heads and the engine block? Did you check the heads for warpage? Did you check the block deck surface for any unevenness? Any of these areas could prevent a new gasket from properly sealing. Are you having to add coolant? Did you replace the thermostat? Did you make sure that the thermostat was properly positioned in the housing? It should go in with the coil spring side to the engine. Did you flush the cooling system and install fresh antifreeze?

Feb 06, 2011 | 2000 Pontiac Grand Am GT

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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.

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Thermostat replacement 1994 nisan sentra 1.6 eng how to remove and replave


JUST DRAIN COOLANT LEVEL BELOW THE THERMOSTAT. CATCH COOLANT IN A DRAIN PAN UNDER RADIATOR.THEN REMOVE RADIATOR HOSE FROM THERMOSTAT HOUSING ON THE CYLINDER BLOCK.THEN REMOVE THERMOSTAT HOUSING AND THERMOSTAT.CLEAN THERMOSTAT HOUSING SURFACE AND THERMOSTAT HOUSING SEALING SURFACE ON CYLINDER HEAD.INSTALL NEW THERMOSTAT IN PLACE,MAKE SURE THERMOSTAT AIR BLEED HOLE FACING LEFT SIDE UPWARD ON THE ENGINE.SOME THERMOSTAT HAS TOP STAMPED ON IT.MEANING MUST BE FACING UP.WHEN THERMOSTAT IN PLACE.TAKE NEW THERMOSTAT GASKET.PUT SEALER ON BOTH SIDES OF GASKET.THEN.PUT GASKET ON THERMOSTAT HOUSING.THEN PUT HOUSING IN PLACE TORQUE HOUSING BOLTS 16 - 20 FT LBS.WAIT 1 HOUR UNTIL GASKET SEALER CURE.THEN FILL UP COOLANT SYSTEM.BLEED COOLANT SYSTEM AND CHECK FOR LEAKS.

Sep 17, 2010 | 1994 Nissan Sentra 4-Door

1 Answer

Where is the thermostat located on a 1991 nissan sentra


Thermostat REMOVAL & INSTALLATION CAUTION
When draining the coolant, keep in mind that cats and dogs are attracted by ethylene glycol antifreeze, and are quite likely to drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain the coolant into a sealable container. Coolant should be reused unless it is contaminated or several years old. E-Series Engines NOTE: The engine thermostat is housed in the water outlet casting on the cylinder head.
  1. Open the draincock on the radiator and drain the coolant into a suitable drain pan.
  2. Remove the upper radiator hose from the water outlet side and remove the bolts securing the water outlet to the cylinder head.
  3. On E16 models, remove the exhaust air induction tube clamp bolts, then the water outlet bolts.
  4. Remove the water outlet and thermostat. To install:
  5. Clean off the old gasket from the mating surfaces with a razor blade or equivalent.
  6. When installing the thermostat, be sure to install a new gasket and be sure the air bleed hole in the thermostat is facing the left side (or upward) of the engine and that the spring is toward the inside of the engine. Also make sure that the new thermostat to be installed is equipped with an air bleed hole.
CA16DE, CA18DE and GA16i Engines Fig. 1: Always make certain the jiggle valve is facing upward when installing the thermostat 88163g33.gif
  1. Disconnect the negative (-) battery cable and drain the coolant from the radiator and the left side draincocks on the cylinder block.
  2. On GA16i engines, disconnect the water temperature switch connector from the thermostat housing.
  3. Remove the radiator hose from the water outlet side and remove the bolts securing the water outlet to the cylinder head.
  4. Remove the thermostat and clean off the old gasket or sealant from the mating surfaces. To install:
  5. Install the thermostat with a new gasket. When installing the thermostat, be sure to install a new gasket or sealant and be sure the air bleed hole in the thermostat is facing the left side or upward on the engine. The jiggle valve must always face up. Also make sure the new thermostat to be installed is equipped with an a ir bleed hole. Some thermostats have the word TOP stamped next to the jiggle valve. Again, the word TOP and the jiggle valve must be facing up. NOTE: When using RTV sealant instead of gaskets, make sure the surface you are working on is very clean before applying the sealant, then apply an even bead. Allow the RTV to dry slightly to form a thin skin. The component MUST be tightened before the RTV dries completely. The bolt torque should be checked again after RTV has completely dried.
  6. Install the water outlet and upper radiator hose.
  7. On GA16i engines, connect the water temperature switch connector to the thermostat housing.
  8. Fill the cooling system and connect the negative (-) battery cable.
  9. Bleed the cooling system as outlined in this section.
1.6L (GA16DE) and 2.0L (SR20DE) Engines Fig. 2: Thermostat and housing — SR20DE engine 88163g34.gif
Fig. 3: Thermostat and housing — GA16DE engine 88163g35.gif
Fig. 4: Always make certain the jiggle valve is on the top side — GA16DE engine shown 88163g36.gif NOTE: The thermostat is housed in the water outlet casting on the cylinder head on most models. On the GA16DE engines, the thermostat is housed in the water outlet casting attached to the water pump.
  1. Disconnect the negative (-) battery cable.
  2. When cool, open the draincock on the radiator and drain the coolant into a suitable drain pan.
  3. Remove the upper radiator hose from the water outlet side and remove the bolts securing the water outlet to the cylinder head and any other components in the way.
  4. Remove the water outlet and thermostat. To install:
  5. Clean off the old gasket from the mating surfaces of the thermostat housing and engine block. NOTE: When using RTV sealant instead of gaskets, make sure the surface you are working on is very clean before applying the sealant, then apply an even bead. Allow the RTV to dry slightly to form a thin skin. The component MUST be tightened before the RTV dries completely. The bolt torque should be checked again after RTV has completely dried.
  6. When installing the thermostat, be sure to install a new gasket and be sure the air bleed hole in the thermostat is facing upward and that the spring is toward the inside of the engine.
  7. Install the water outlet and tighten the bolts.
    • GA16DE — 13–16 ft. lbs. (18–22 Nm)
    • SR20DE — 60–72 inch lbs. (6–8 Nm)
  8. Install the remaining components in the reverse order of removal. prev.gif next.gif

Aug 03, 2010 | 1991 Nissan Sentra 2 Door

2 Answers

My 1996 chevy suburban wont start


If you plugged the original leak (which sounds like the head gasket) and then the radiator was leaking, and you are having water coming out of the exhaust, then you need to replace the head gaskets. It sounds like you had a blown head gasket from the start. Here's what to do.

1. Replace the head gaskets (will need intake manifold gasket as it need to come off for this procedure).

2. Replace thermostat, radiator cap (if radiator is still good)

3. Replace water pump; the water pump may have stopped working (mechanical), which in turn caused the pressure to build an blow the head gasket (the cause of the pump would be a bad thermostat. If the truck was overheating, then the thermostat was bad to begin with, then the pump, then the head gasket, so then the only place left for the water to go is out the exhaust.

Here is a list of replacements:

^ water pump
^ thermostat
^ head gaskets
^ valve cover gaskets
^ radiator cap (if radiator is good)
^ radiator : if leak from cap caused any damage to radiator (should still be good)

**Also check the radiator hoses to ensure they do not have any "bubbles". Hot water over time (with anti-freeze) erodes the inside of the hoses, and begins to "dig" holes and grooves in the hose, which evetually cause leaks. Consider replacing these as well for safe measure.

Please, let me know if you need further assistance.

carsandcomps,

Guru, Premium Expert @ Fixya.com

Jun 22, 2010 | 1996 Chevrolet Suburban

1 Answer

How do you replace a thermostat on a 2002 toyota celica


Toyota Celica, Corolla, ECHO & MR2 1999-05Toyota Celica, Corolla, ECHO & MR2 1999-05

2002 Toyota Celica 1.8L MFI DOHC 4cyl


The thermostat is located in the water inlet housing that is connected to the lower radiator hose.
The thermostat is equipped with a by-pass valve. If the engine tends to overheat, removal of the thermostat would cause a decrease in cooling system efficiency.

CAUTION NEVER drain coolant directly onto the ground! NEVER open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
d4c6b82.jpg

Fig. The oil filter must be removed to access the thermostat on the 5S-FE engine
  1. Position a suitable drain pan under the radiator drain **** and drain the cooling system.
  2. On the 7A-FE engine disconnect the engine coolant temperature switch harness from the water inlet housing.
de1afd5.jpg

Fig. Disconnect the engine coolant temperature switch wiring located on the side of the thermostat housing
  1. Remove the oil filter on 5S-FE engines.
  2. Loosen the hose clamp and disconnect the lower radiator hose from the water inlet housing.
d253a81.jpg

Fig. Loosen the radiator hose clamp ...

5746ade.jpg

Fig. ... then slide the hose off the thermostat housing
  1. Remove the two nuts from the water inlet housing and remove the housing from the water pump studs.
f78b0a7.jpg

Fig. Only two nuts hold the housing to the cylinder head

de736db.jpg

Fig. Pull the housing straight out to remove
  1. Remove the thermostat and rubber O-ring gasket from the water inlet housing.
f722bd2.jpg

Fig. Then pull the thermostat and gasket out

bd62248.jpg

Fig. Sometimes the gasket is stuck and has to be pried out of the head
To install:
  1. Make sure all the gasket surfaces are clean. Clean the inside of the inlet housing and the radiator hose connection with a rag.
  2. Install the new rubber O-ring gasket onto the thermostat. On 5S-FE engines, align the jiggle valve with the upper side of the stud bolt. Insert the thermostat into the housing.
abce49b.jpg

Fig. Only use the correct temperature range thermostat when for replacement

edd75f2.jpg

Fig. Align the jiggle valve within a 10°gap of the stud bolt-7A-FE engine

d56a45f.jpg

Fig. Align the jiggle valve within a 5°gap of the stud bolt-5S-FE engine
  1. Position the water inlet housing with the thermostat over the studs on the water pump and install the two nuts. Tighten the two nuts to 78-82 inch lbs. (9-10 Nm).
Don't forget to install a new O-ring onto the water inlet pipe. Apply soapy water to the O-ring prior to installation.
  1. Connect the lower radiator hose to the inlet housing and install the hose clamp.
  2. Attach the water temperature switch connector.
  3. Install the oil filter and check the oil level if removed.
  4. Fill the cooling system with a good brand of ethylene glycol based coolant.
  5. Start the engine and inspect for leaks.
  1. Remove the right hand cover under the engine.
  2. Drain the engine coolant.
  3. Remove the fan and generator V belt.
  4. Remove the generator assembly
  5. Remove the water inlet via the two nuts.
  6. Remove the thermostat.
To install:
  1. Install a new gasket onto the thermostat.
  2. Install the thermostat with the jiggle valve upward. It can be set within 10 degrees on either side of the prescribed position.
  3. Install the water inlet via the two nuts. Torque to 8 ft. lbs. (11 Nm).
  4. Install the generator assembly.
  5. Add engine coolant.
  6. Inspect for leaks.
  7. Replace the cover under the engine.
I hope help you with this (remember rated this help) Good luck.

Sep 29, 2009 | Toyota Celica Cars & Trucks

1 Answer

Leaking water still.


That sounds really bad,was the head checked for cracks?And were the head gaskets replaced?I would say you would be best to replace motor.

Dec 13, 2008 | 1991 Ford Explorer

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1996 honda prelude oil leak


did you check the steering pump, AC compression pump, etc or other engine components ? it could be something other than the engine.

Nov 18, 2008 | 1996 Honda Prelude

5 Answers

Chevy cavalier 1997 2.2 coolant leak


Alright, the best way to find a leak is to fill the reservoir and get it up on ramps or a car lift would be excellent. Start the engine and find out where the leak is coming from. Most common leaks are simply just bad hoses or busted fittings. However, there could be a blown head gasket, hole in the radiator, or a bad seal on the thermostat housing.

I've even seen where a bad thermostat was causing high pressure in the water system and ended up blowing the excessive pressure and water out the overflow, even when the water was actually low. So, find the location of the leak. Use the method I told you and it will help you find the exact location. Then you can proceed on fixing the leak.

Hope this helps out! :)

Sep 14, 2008 | 1997 Chevrolet Cavalier

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