03 MARAUDER OVERHEATING

[dbrown]

yes I believe so....however the lower hose does not seem to be pressurized and is never as hot as the other hoses...I believe thats normal though..I could be wrong. Is there a possibility that the fan could be bad? It spins when the temp rises..but I read somewhere that that doesnt mean its doing its job.

[RubberCtyRauder]

It can take more than one burping procedure.. Are you following the steps in the stickied post here in the forum? Replace the cap in overflow tank..(degaussing) if it overheats when accelerating, seems like air pocket preventing flow to me. Is stat installed in correct position?

[WhatsUpDOHC]

It looks like your Murray thermostat is identified as a Marauder tstat but a number of posts and acknowledgements identify this tstat as being correct

Motorcraft RT1085

You may want to try another tstat (the Murray is bad?).

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[WhatsUpDOHC]

Also I'm sure that you've seen this but just in case, it's worth reposting

http://www.reischeperformance.com/refill.html

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[dbrown]

Thanks, I looked for the RT1085 but cant find it. I ended up taking to the dealership this morning, because she is my DD and i cant go long without her. I'll post the results of the Diag

[Themarauderguy]

Try running without the thermostat I've done that before. and i always back feel mine from the cross over tube. slowly fill it. I never have had to burp it when I do it that way. If it still overheats without a thermostat and your radiator fan is working. I would look for a head gasket test kit.

[BLACKMARAUDER04]

The correct thermostat is Genuine OEM Ford Thermostat F5OY8575A RT1110 Motorcraft


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[MyBlackBeasts]

Thanks, I looked for the RT1085 but cant find it. I ended up taking to the dealership this morning, because she is my DD and i cant go long without her. I'll post the results of the Diag

New Motorcraft number is 7L3Z-8575-D

https://www.tascaparts.com/oem-parts...bC12OC1nYXM%3D

https://www.amazon.com/Ford-7L3Z-857...2800059&sr=8-1

[Mr. Man]

If the car ran fine before you worked on it the problem is most likely related to something you did. IIRC the Marauder thermostat has a hole it it to allow coolant to flow all the time to some degree. Did the replacement T-stat have that hole? If it did it sounds like there is still air in the system somewhere.

[MyBlackBeasts]

If the car ran fine before you worked on it the problem is most likely related to something you did. IIRC the Marauder thermostat has a hole it it to allow coolant to flow all the time to some degree. Did the replacement T-stat have that hole? If it did it sounds like there is still air in the system somewhere.

The hole is to allow air thu it when filling system. This is why when installing in a vertical application the hole (or sometimes a little dangely valve) has to be in the 12 o'clock position.

[Spectragod]

"degaussing tank"? Huh?

So just guessing, you never verified if your cap was holding pressure? As hard as it is to believe, this system requires pressure for the cooling system to work, no pressure, no cooling, but it’s at the dealer, they’ll figure it out for you.


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[88LTDCV351]

Does it have the bypass? Should be a hole near the spring.

[88LTDCV351]

"Beware of aftermarket companies who sell the same thermostat for all Ford modular engines. Those units are designed for the 2V SOHC engine and, if installed in the improper housing, will be unable to shut off the bypass- allowing hot coolant to recirculate back into the engine at all times, reducing the efficiency of your cooling system. "

[dbrown]

Thanks for the comments guys. Ill break down everything as it happened.
Left work Friday- car overheated
Sunday- replaced thermostat with a Murray t-stat shown in my earlier post= car still overheating; replaced water pump= car still overheating; replaced driver side coolant temp sensor= car still overheating; burped the car 700 times=car still overheating; replaced reservoir cap (just to be sure) = CAR STILL OVERHEATING;
Monday- bought lift ramps to get the front end higher and burped it 100 times= CAR STILL OVERHEATING
Thursday= DEALERSHIP/ STEALERSHIP
Still waiting for diagnostic

[BLACKMARAUDER04]

I think it’s your thermostat.
You have the wrong one. Only use a Motorctaft in


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