03 MARAUDER OVERHEATING

[dbrown]

Hey guys, cant seem to solve the issue with my 03 Marauder w/ 110k miles overheating. I changed the water pump, thermostat, and a coolant temp sensor (driver side). I also followed the recommend Burp Procedure. The fan blows, the hot and cold air work on the AC. Ive run out of ideas here guys. Any help would be greatly appreciated.

[88LTDCV351]

Make sure you got the right thermostat. A number of thermostats listed for the Marauder on a number of sites, say they also are for Marauder but are actually the wrong ones. They are for Grand Marquis, etc. which is not the same.

[Grimrepairman]

Also make sure the radiator is clean. Could be plugged with dirt, leaves, etc. No airflow means no cooling.

[dbrown]

Is this the right one?

Murray plus part number 4139

[RubberCtyRauder]

Make sure the fan is coming on, and is it put in correct position? It can be put in upside down

[dbrown]

The fan comes on. I will spray the radiator off when I get home from work. I just need to know if I put in the correct stat. I listed it above ^

[offroadkarter]

Is the crossover tube full while the car is off and cold? Common problem is people don't fill the system enough and the COT is low which makes it overheat fast.

[dbrown]

Yes it is...I've searched the threads for every overheating issue and tried everything I could find to solve the issue. I'm now thinking it may be something with the radiator but that doesn't seem to be a common issue with Marauders.

[Spectragod]

Bad cap on the degaussing tank. I’ll almost guarantee that it tests bad, and if it does, the car will overheat.


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[dbrown]

"degaussing tank"? Huh?

[Themarauderguy]

What part of Texas are you in

[dbrown]

Fort Hood area

[MyBlackBeasts]

"degaussing tank"? Huh?

https://en.wikipedia.org/wiki/Degaussing

[dbrown]

I spent $60 on ramps and burped it again with the front end elevated. Everything seemed ok, until I took it around the block and got on the gas...temp gauge rose almost to the red....IM THIS CLOSE TO BUYING A CHEVY!! Help me damnit.
FYI I did notice that the temp held when i was stopped but slowly rose when i was on the gas.51120

[sailsmen]

When it's over heating is coolant flowing in and out of the rad? Put on some gloves and squeeze the hoses.

[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/ford-engine-coolant-thermostat-7l3z8575d?c=Zz1jb29saW5nLXN5c3 RlbSZzPWNvb2xpbmctc3lzdGVtJmw9 OSZuPUFzc2VtYmxpZXMgUGFnZSZhPW 1lcmN1cnkmbz1tYXJhdWRlciZ5PTIw MDMmdD1iYXNlJmU9NC02bC12OC1nYX M%3D

https://www.amazon.com/Ford-7L3Z-8575-D-Engine-Coolant-Thermostat/dp/B00M37E4VO/ref=sr_1_1?dchild=1&keywords=Motorcraft+7L3Z-8575-D&qid=1602800059&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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[fastblackmerc]

Want to bet the stealership can't fix it either?

[fastblackmerc]

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


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I think it's either the wrong stat or it was installed up side down.

[88LTDCV351]

I say wrong T-stat. Stealership and Goodyear couldn't figure mine out either when I had the wrong T-stat in. Only reason I even went aftermarket was because everyone said Motorcraft had to be ordered. At first I didn't want to wait. Eventually I went ahead and did the wait and bought a Motorcraft one shipped to me. Once the Motorcraft was in, never had a problem since.

I'm sure some aftermarket ones work, but it's a matter of getting the right one with the bypass. Even looking at the pictures on RockAuto, most of them listed don't have the hole and I see some listed with the same part number for the SOHC which I know is not correct.

[fastblackmerc]

IMHO... the BEST Marauder stat.

FORD-4D

https://www.reischeperformance.com/#anchor

https://www.ebay.com/itm/170-Thermostat-for-Mustang-Cobra-Mach-4-6L-DOHC-Taurus-SHO-Ford-EcoBoost-3-5L/254686822020?hash=item3b4c847e 84:g:H0oAAOSwxK9bW3za

[1Marauder]

So... The second on on the list for Marauders?

[dbrown]

Ok guys, I have good news and bad news. Good news is that is was the wrong thermostat. The stealership replaced my murray with a motorcraft and the car is no longer overheating. BAD NEWS!! the service rep called and said my car was ready but it was "running rough". I picked it up and now the engine is making a high pitch knocking noise and the car shakes in idle and in 1st gear. Any clue on what these idiots could have done to my baby?

[Joe Walsh]

My guess:
Service tech took the Marauder 'for a test drive' (Lots of WOT) while it still had the overheating problem, and did damage to #7 or #8 cylinders/valves.

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[dbrown]

thats what I was thinking

[dbrown]

how much does that cost to get fixed

[fastblackmerc]

how much does that cost to get fixed

Alot.....................

[Joe Walsh]

Is it throwing any CEL codes?

Bad COP or plug will cause a rough idle.

See if you can get them to do a compression test or a leak down test for free.... because the problem started since the car was in their Service Dept.


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[dbrown]

Cylinder 8 is misfiring, my buddy says he thinks I need a coil pack....does that sound right?

[Joe Walsh]

That would be good news....the coil packs do go bad and are relatively inexpensive to replace.

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[dbrown]

Im going to change the spark plugs and coils...I need the MM up and running ASAP. Any suggestions on what brand to buy or where to get them quick? Thanks guys.

[BLACKMARAUDER04]

I like Motorcraft Sp505 copper plugs and I would go with Ford Motorsport pack of 8 COP’s for 4V engines like Mustang Mach 1 or Gt500 for around $200 depending where you purchase


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[BLACKMARAUDER04]

Here is the item

1999-2004 Mustang SVT Cobra OEM M-12029-4V Engine Ignition Coils 8pc Set
Ebay is $210


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[crouse]

Go to Rock Auto. Motorcraft SP433 AGSF32WM $2.51 each. Stick with Motorcraft coils also. Rock Auto shows $53.79 each. Seems high to me. I would think a set of 8 should be about $200.

[Joe Walsh]

COPs have been getting 'pretty salty' the last few years.

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[MyBlackBeasts]

Support our vendors: http://spartaperformance.com/svt-4v-ignition-coil-set/

[dbrown]

P0443 and i got codes showing cylinders 5/7/8 misfire AND P0171 and P0174 ....gonna replace the Vapor Canister...any other suggestions? Thanks team!

[MileHiMarauder]

I had the same issue a couple if years ago. After two trips to the dealer new water pump and thermostat it did it again. Turned out that I needed to clean the outside if the radiator. Just the dust and road grime kept enough air flow out that t overheated. Since I rinse the front side of the radiator regularly, no mor overheating problems.


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[dbrown]

Okay, so here's what happened. The dealership replaced the thermostat with a motocraft one and the overheating issue has stopped. Here is how they screwed me. When the service rep called me he told me that the overheating is fixed but now the car is "RUNNING ROUGH". Keep in my mind it wasn't running rough when I brought it in. I told them that the technician must have done something. Anyway this is there diagnostic:

PERFORMED PCM SELF TEST AND FOUND P0307 AND P0308. PERFORMED MISFIRE TEST AND FOUND CYLINDER#8 MISFIRING. PERFORMED RELATIVE COMPRESSION AND FOUND CYLINDER#8 DOWN 41%. PERFORMED MANUAL COMPRESSIONA AND FOUND CYLINDER#8 IS OPSI. RECOMMEND REPLACING LONG BLOCK ASSEMBLY DUE TO MILEAGE AND RETEST.

Who knows, maybe I do need another engine. But I would like to explore more affordable means first, like changing the coils or even the distributor.....any thoughts?

[fastblackmerc]

Okay, so here's what happened. The dealership replaced the thermostat with a motocraft one and the overheating issue has stopped. Here is how they screwed me. When the service rep called me he told me that the overheating is fixed but now the car is "RUNNING ROUGH". Keep in my mind it wasn't running rough when I brought it in. I told them that the technician must have done something. Anyway this is there diagnostic:

PERFORMED PCM SELF TEST AND FOUND P0307 AND P0308. PERFORMED MISFIRE TEST AND FOUND CYLINDER#8 MISFIRING. PERFORMED RELATIVE COMPRESSION AND FOUND CYLINDER#8 DOWN 41%. PERFORMED MANUAL COMPRESSIONA AND FOUND CYLINDER#8 IS OPSI. RECOMMEND REPLACING LONG BLOCK ASSEMBLY DUE TO MILEAGE AND RETEST.

Who knows, maybe I do need another engine. But I would like to explore more affordable means first, like changing the coils or even the distributor.....any thoughts?

As someone posted earlier, the tech probably test drove it until the #8 cylinder overheated and dropped the valve seat(s). The #8 cylinder is known for cooling issues unless you have the cooling mod installed.

[Joe Walsh]

Okay, so here's what happened. The dealership replaced the thermostat with a motocraft one and the overheating issue has stopped. Here is how they screwed me. When the service rep called me he told me that the overheating is fixed but now the car is "RUNNING ROUGH". Keep in my mind it wasn't running rough when I brought it in. I told them that the technician must have done something. Anyway this is there diagnostic:

PERFORMED PCM SELF TEST AND FOUND P0307 AND P0308. PERFORMED MISFIRE TEST AND FOUND CYLINDER#8 MISFIRING. PERFORMED RELATIVE COMPRESSION AND FOUND CYLINDER#8 DOWN 41%. PERFORMED MANUAL COMPRESSIONA AND FOUND CYLINDER#8 IS OPSI. RECOMMEND REPLACING LONG BLOCK ASSEMBLY DUE TO MILEAGE AND RETEST.

Who knows, maybe I do need another engine. But I would like to explore more affordable means first, like changing the coils or even the distributor.....any thoughts?

There is no distributor on these DOHC engines and replacing the COPs wont help if you have a low or '0' compression on #8 cylinder.
It is a mechanical problem in that cylinder.

Talk to the dealership's Service Manager because the "Its running rough now" wasn't there when you brought the vehicle in for the overheating problem.

Unfortunately....It is going to be next to impossible to get them to admit what they did to your Marauder.
They will give you the 'Bill Clinton'....Deny, deny, deny, deny.
Then they will give you the real 'Bill Clinton' by doing a complete long block install for $$$$$$$$$$$$


.

[RubberCtyRauder]

It does not need a longblock, which Ford no longer has, it needs the head pulled off and #8 valves redone. Dealerships do not repair, they replace..they want to charge you prolly $7-9000 to replace long block is my guess.

[Peace2Peep]

I so hate it when dealerships/mechanics don't respect folks vehicles...ugh! Hope this all works out for you!

[dbrown]

you are absolutely correct.

[MyBlackBeasts]

I so hate it when dealerships/mechanics don't respect folks vehicles...ugh! Hope this all works out for you!

That's what the valet tune is for.

[Maraudernoob92]

Similar problem happened to me i tried alot of things and turned out ut was just a bad radiator cap I bought a new one and it never over heated again

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[BLACKMARAUDER04]

Using the RT1110 number gives a lower price.

All 3 numbers are the same item.

[Prospect62]

I'd be curious to know how this story ended.

I'm also curious as to the proper part number for a new thermostat for a Marauder. I have heard RT1110 is the latest, I've also heard RT1196, RT1234 and RT1085. The funny part is, they all look different. So one has to be right and it would seem getting the right one is critical. Man my 2V was way easier...

[fastblackmerc]

I only use this:

https://www.reischeperformance.com/F4Ddata.html

[parker]

I only use this:

https://www.reischeperformance.com/F4Ddata.html

Same one I have.
Also put one in my 89 Bronco.


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[Prospect62]

Thanks guys, but until I can get this thing Marty tuned I'd like to stick with the OEM temperature.