Question about 1998 Ford Crown Victoria

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Coolant leaks from the plastic housing that the thermostat sits down into.

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You may have to remove the thermostqat housing and replace the O ring that is the seal. Otherwise the housing is cracked and needs to be replaced or repaired with an epoxy patch. Hope this assists you. coolant leaks from the plastic housing that the - 3ef2f06.gif

Posted on Aug 21, 2010


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How to replace thermastat in a 2006 mercedes cls500

Make sure the engine is fully cold, open the radiator cap on the plastic reservoir, drain the coolant into a large pan by opening the plastic plug at bottom of radiator - reclose the plastic plug when drained. Cover the top half of the serpentine belt with a plastic bag. Remove the spring clip radiator hose connection at the engine block/thermo housing. Move the radiator hose back and forth gently until it breaks loose. Loosen the 10mm bolts holding the thermo assembly in place. Tap the thermo housing with a rubber or plastic hammer or pry the housing gently with a long blade screwdriver from behind by the lip, Remove the bolts all the way, remove the thermo housing, clean the circular ring area of debris in the engine block where the thermostat sits. Place the new thermostat assembly in place, torque bolts to 5 nm, then back and forth to 12nm then to 22nm. Replace the radiator hose, put on a new clamp and fill radiator with coolant as well as the plastic canister. put the cap on the reservoir, remove plastic bag from serpentine belt, start car - check for leaks, readjust coolant level after 20-25 minutes.

Sep 30, 2015 | 2006 Mercedes-Benz Mercedes Benz CLS500

1 Answer

Just had the head gasket replaced am losing water and there are bubbles in radiator took it back told me bubbles were normal in older cars wondering if water can leak out the thermostat

Well, I've never heard that bubbles were normal in older cars. I'd say the shop was at fault for shoddy repairs. You got it back and it's leaking or losing coolant? Something they should have checked very carefully for before calling the work finished.
Possibly, the bubbles were from overheated coolant because the level was low, after you noticed the loss of water. You asked if coolant can leak from the thermostat-there is a gasket on the thermostat housing that covers the thermostat, and that housing gasket can certainly leak. And sometimes does after thermostat replacement, since the bolts are not torqued down real tight to avoid distorting the gasket and causing a leak. If you see any sign of coolant around the thermostat housing, it may be leaking there. You would need to turn the housing bolts down about a half turn, and see if that stopped the leak. If it still leaks, you would probably need a new thermostat housing gasket. Don't know if you want to confront that shop again, but they should do the service for free, it was their job to finish the job. A small task and a two dollar gasket is about it, but someone will have to drain a good portion of the coolant first. They should have checked for leaks or losing coolant.

Apr 24, 2013 | Cars & Trucks

1 Answer

1997 diahatsu charade ltd overheating no water leaks ,no water in oil, hopefully could be thermostat, were is thermostat located?

open the car hood. look at the radiator, and then the top radiator hose. follow that hose to the engine. the hose connects to the thermostat housing cap. under that cap is the thermostat. here's what you need: ratchet, and sockets, flat-tip screwdriver, scraper, pliers, a new thermostat (any auto parts store), a new gasket, and some gasket sealant. Question, how old are hoses? if 3 years or old, let change those also. 2 new hose, 4 hose clamps, and some coolant. If we're changing hoses with this, lets start. drain the radiator, and remove the hard hose first, the bottom. now remove the top.hose, and lets start the thermostat. remove the bolts holding down the cap, and gently pry off the cap. flip the cap over, and scrape it clean to metal(we want NO leaks). now reach down and remove the thermostat, and lets scrape the housing clean to metal. place the new thermostat in the housing, and lets put a thin coat of gasket sealant on the housing. place the gasket on the sealant, and pick up the cap. apply a little gasket to the cap. place on top of the gasket, and bolt it down. now hook the hoses(if your changing them)and let sit 30 minutes for the gasket sealant set. after that, let add the coolant, and water. start the car, let it warm up. when the new thermostat opens, add more coolant as need to top it off. Hope this helps

Jan 03, 2011 | Daihatsu Charade Cars & Trucks

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I have a 2000 mazda millinia and it is overheating and the coolant is leaking. Could you tell me what some of the problems may be?

Hello, the thermostat on the Mazda Millenia is the heart of the coolant system. The thermostat regulates the flow of coolant to your motor and ensures your Mazda runs cool at all times. The thermostat acts as a valve to allow just enough coolant to flow through the system to maintain the engine temperature. When the engine temperature cools, the thermostat will close and pressurize the coolant. This cycle is what keeps your engine running cool.

To remove the thermostats follow this steps:
1. Pull the hood release latch under the steering wheel. Access the engine compartment to replace the thermostat.

2. Remove the top radiator hose by unscrewing the hose clamps with a flat-head screwdriver. The hose clamp may have a hose clamp requiring pliers. This clamp will have two tabs on it. Pull the tabs together to loosen the hose clamp.

3. Remove the bolts at the top of the thermostat assembly. The radiator hose will stop at the thermostat assembly.

4. Remove the top portion of the thermostat assembly. The thermostat will be sitting in the bottom portion.

5. Remove the thermostat with your fingers. The thermostat is positioned a particular way. Remember the position it was sitting in the housing.

And for installing the thermostats follow the following steps:

1. Place the new thermostat in the housing. Remember the position of the old one.

2. Lay down the gasket around the surface of the housing. Scrape off the old gasket with a putty knife or a razor blade.
3. Tighten the housing back together. You will want the housing snug to help create a seal for the assembly.

4. Install the radiator hose back on the assembly and the radiator. Tighten the hose clamp snug.

5. Refill the coolant level back to full. Some coolant may have been lost during the replacement.


Jul 19, 2010 | 2000 Mazda Millenia

2 Answers

I have a 98 lincoln town car executive and I need to know how you change the thermostat

1. drain coolant
2. remove engine cover
3. remove the 2 bolts from water hose connection (upper rad hose connecting to)
4. remove o-ring and thermostat
5. repeat in reverse order

Feb 05, 2010 | 1998 Lincoln Continental

2 Answers

Overheat & Coolant Leak


Jul 31, 2009 | 2003 Lincoln LS

1 Answer

I have a coolant leak in my 2005 Ford Mustang from behind the thermostat. What is causing this?

I just had this happen to me we had to replaced the whole thermostat housing because its plastic it cracked no explanation why but the crack was in the very back leaking down towards the waterpump .

May 09, 2009 | 2005 Ford Mustang

2 Answers

1998 mustang gt coolant leak

I just had the same problem. Ford design the intake manifold with plastic water crossover which cracks. The coolant will leak onto the top of the block and and then down the back of the engine. This intake design is a known defect and was ocvered under by Ford for 7 years past the date of mfg. The crack either is in the crossover or the thermostat housing. I happed on this when I found the same leak and traced it back to the thermostat housing. I changed the thermostat, but it leaked worse. You can pickup a aftermarket for $200 and it's about 4-6 hr job to replace.

Oct 18, 2008 | 1998 Ford Mustang

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