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Discussion Starter #1
For the past month or so my engine temp has been kind of high due to driving at high rpm's when my trans was bad, so I figured this problem would be solved when the transmission was fixed.

Well, It wasn't. I am consistantly running 210-230 degrees, granted these gauges are ****, but it still worries me. I have also been drinking coolant pretty regularly, How would I check for a leak, is there a common place I should check first.

What else could be causing the high temps.

Thanks

Dave
 

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If your temps have been high and you are loosing coolant than you likely have a leak.
Have the cooling system pressure tested. Your water pump could also be a candidate.
Any strange sounds from the front of your engine? (failing pump)

If you have a large enough pocket of air trapped in the cooling system it can become air bound.
But that requires a lot of air. Have you ‘burped’ the hose running from the radiator to the manifold?
Squeeze it a few times and see if you are squeezing water or air in the hose.

This assumes that your coolant looks clean and you oil is not contaminated.
 

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Discussion Starter #3
tbirdbrain said:
Have the cooling system pressure tested. Your water pump could also be a candidate.
Any strange sounds from the front of your engine? (failing pump)

Squeeze it a few times and see if you are squeezing water or air in the hose.

This assumes that your coolant looks clean and you oil is not contaminated.
Would I be able to get the system pressure tested at a shop, or is it doable yourself with a tool of some sort, I only ask because most people will say your stuff is broken just to make a buck.

The hose feels fine, not too squishy, normal how it's always felt.

I haven't changed the oil yet, since this started, but I will find out soon enough I guess.

Thanks Alot.

Any idea how much it may cost to get pressure tested?

Dave
 

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any shop should be able to pressure test your system. I would start with that, and then thermostat, and then get into the radiator.
 

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Before you start to spray like a mofo, first fix that problem and then use the spray. Just FYI
 

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:thumbsup: NP
 

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Formerly Fdawg97LX
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did u get it pressure tested yet? just wondering if u found out what it was.

Frank
 

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isn't that i heard that 180 stat will make the low speed driving the temp little bit higher assuming if you still running on the stock tune or no tune from chip. i forget what's the theory now but it make sense.
 

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DMcBrideBoston said:
Pressure Tested today, no leaks......I;m stumped
have u noticed any drips or puddles on the ground at all? change the thermostat again (maybe you got a fualty one). Was the t-stat u used motorcraft? check out your water pump and check for leaks around the radiator also.

Frank
 

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You say its loosing coolant,and it was pressure tested with no leaks found.I would be suspicious of head gasket problem.The coolant is going into the cylinder and being "burned" in the combustion process.
Look to see if your getting any white smoke out the exhaust,especially after its warmed up.
If you dont see anything,then take it in to a shop that has a hydro-carbon sniffer,have them run it across the radiator fill tank.If they pick up any hydr-carbons,then youve found your problem.Gasket is failing.
Btw,the sniffer I am referring to,is used for tailpipe emission checks.
And they dont need to stick it into the coolant.Hover it ,and it should do,the trick.
 

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I suggest using a temp gun on the radiator. It could be plugged and will have cool spots. If you haven't changed the waterpump do it. These have got to be the easiest waterpumps to change. EVER. you don't even have to scrape a gasket off. The impeller may have broken in the water pump.
Also I always remove the coolant temperature sensor to fill these engines. They like to trap air in the top of the manifold.
 

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Discussion Starter #15
oldjd said:
You say its loosing coolant,and it was pressure tested with no leaks found.I would be suspicious of head gasket problem.The coolant is going into the cylinder and being "burned" in the combustion process.
Look to see if your getting any white smoke out the exhaust,especially after its warmed up.
That was exactly what the guy at the shop said, althoughI don't see any dips in power or white smoke or any color smoke for that matter.

I'll keep trying to figure this out. We will see soon enough.

If it does happen to be the HG's, it looks like my PnP job will happen alot sooner.

Dave
 

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Discussion Starter #16
I have a few questions now, because I have to fill the damn fill tank everyday. I have to find out what is wrong here. I was laying on the ground today watching under the car, with it on for 20 minutes and off for 25 minutes. THere is no coolant dripping anywhere. There is no smoke at all coming from the pipes. THere is a tiny and I mean tiny rough idle, but that's it. Hoses are fine. From what I can tell by the dipstick there is no coolant in the oil, and vice versa.

I took it to a place to find out about the sniffer, nd the guy looked at me like I was crazy. Is this a common useage of the sniffer?

Thanks

Dave

IS there a way to tell if the waterpump or radiator are bad? Although where would all the coolant go? I know it's not all sitting in the radiator.
 

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You've had it pressure tested and no leaks.
Do you smell coolant?
oldjd said:
The coolant is going into the cylinder and being "burned" in the combustion process.
DMcBrideBoston said:
That was exactly what the guy at the shop said, althoughI don't see any dips in power or white smoke or any color smoke for that matter.Dave
The coolant is going somewhere.
Have you checked the spark plugs?
 

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sounds like blown heqadgaskets. i've seen headgaskets go on the 3.8's with no sign other than coolant loss. if you cant figure it out for sure best bet is to take it to a shop and let them look at it.

Frank
 

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fdawg97lx said:
sounds like blown heqadgaskets. i've seen headgaskets go on the 3.8's with no sign other than coolant loss. if you cant figure it out for sure best bet is to take it to a shop and let them look at it.

Frank
Pleae don't compare 4.6 modular engine to 3.8 pushrod junkers it slightly angers me.


Alot of shops have the equipment to check for exhaust gases in the radiator. That may be a good thing to have checked out. You could just have a slight leak in the radiator that is hiding itself in the frame or something. Some coolant leaks can be a real PITA to find. My buddy has a 91 3.8 that leaks out the side tanks of the radiator. But only when it is really cold WTF?. Anyway I haven't known 4.6's to have head gasket problems. Can't say the same for 3.8's. If you told me it was a 3.8 the first thing I would say is either the headgaskets are bad or the head cracked.
Alan
 

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dirtyd0g said:


Pleae don't compare 4.6 modular engine to 3.8 pushrod junkers it slightly angers me.


Alot of shops have the equipment to check for exhaust gases in the radiator. That may be a good thing to have checked out. You could just have a slight leak in the radiator that is hiding itself in the frame or something. Some coolant leaks can be a real PITA to find. My buddy has a 91 3.8 that leaks out the side tanks of the radiator. But only when it is really cold WTF?. Anyway I haven't known 4.6's to have head gasket problems. Can't say the same for 3.8's. If you told me it was a 3.8 the first thing I would say is either the headgaskets are bad or the head cracked.
Alan
buddy,

first of all, i'm not comparing the 4.6 to the 3.8. i'm simply stating syptoms of headgasket problems are not always as clear as white smoke coming from the exhaust. It doesnt matter what engine it is, blown headgaskets are blown headgaskets. a blown headgasket on a 4.6 do not have different symptoms than blown headgaskets on a 3.8, same symtoms. And i dont really care what angers you and what doesnt, i'm not here to make you happy.

Second, Just because the 4.6 doesnt have common headgasket problems like the 3.8 doesnt mean that headgaskets have nver been blown on a 4.6, cuz trust me they have.

Third, a small leak in the radiator wont drink the whole coolant reservoir every day. and if it did it wouldnt be a slight leak it would be a major leak that would show some sign of coolant somewhere. he said he was under the car for 45 minutes and saw no coolant


Dave, your best bet is to have a mechanic look at it and tell you whats wrong. most places wont charge you just to tell you whats wrong.

Frank
 
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