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Old 10-24-2021, 04:59 AM   #1
Stinky
 
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Default FWD 3.0 V6 using coolant

I've got a '96 Villager...a rebadged Quest, that is using antifreeze. I thought that it was a headgasket. But, today I used a Block-Testor on it, nothing (one of those guizmos that you push down on the radiator and it is supposed to change colors if hydro-carbons are present....no color change).

There is no water on the ground and I can't find any leakage around the motor and/or radiator and no smell of leakage and no antifreeze in the oil and no oil in the water.

This makes me wonder...does a 3.0 have any places, in the intake, that could possibly leak coolant in to the intake and then burn it.

Any other possibilities?
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Old 10-24-2021, 01:28 PM   #2
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A head gasket can go bad and start leaking coolant into the combustion chamber. Pour some UV dye in the coolant and run it a day or two. Then rent a good pressure tester and pressurize the system to 20psi at night. Use a UV pen and you will find the leak pretty quick.
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Old 10-24-2021, 06:04 PM   #3
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Does it have rear heat? You might follow the lines back to the rear heater core with the system pressurized and see if you can find anything. That's a source of leaks that's commonly overlooked on vehicles with rear climate control.
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Old 10-24-2021, 07:11 PM   #4
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No rear heat.
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Old 10-25-2021, 05:14 PM   #5
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I lied....it has rear-heat. But, the fan is busted.

I have the ulta-violet dye in it now. I am going to change a motor mount on it now. Tonight I'll use the light on it.
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Old 10-25-2021, 08:32 PM   #6
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Quote:
Originally Posted by Stinky View Post
I lied....it has rear-heat. But, the fan is busted.
That should not matter, it still has the core. Look forward to hearing that you found a leak!


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What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 10-26-2021, 12:34 AM   #7
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Another thing you should check is the transmission dipstick. Just to make sure the transmission fluid doesn't look like a strawberry milkshake. If it does, well, there's your leak.

And also, usually minivans have some sort of a T against the firewall where the heater hoses branch off for the rear heat. It's usually pretty easy to bypass it and just run the hoses to the front heat, if you don't care about the rear heat.
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Old 10-26-2021, 08:08 PM   #8
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Welllllll, I pressurized the cooling system.* It has a bad waterpump....an AC Delco Professional Grade pump that has been on for only 11 months.* We'll see how rockauto handles it.*

I just ordered an Aisin WP. RA does not well the Aisin pump in a "Kit." It comes solo. I also ordered a new belt...about $27. The WP was about the same price.
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Old 10-27-2021, 01:28 AM   #9
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Glad you found the leak. I hope it's not like the truck engines where the timing belt has to come off to replace it.
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