Oil filter / cooler bypass valve

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Mcwho
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Joined: Sun Mar 25, 2018 3:31 am
Location: DeBary FL

Oil filter / cooler bypass valve

Post by Mcwho »

How does it work, pressure or temp. How do i test it?

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1965 Corvair Monza Coupe 110, 4 speed, Liberty Blue

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Mcwho
Posts: 98
Joined: Sun Mar 25, 2018 3:31 am
Location: DeBary FL

Re: Oil filter / cooler bypass valve

Post by Mcwho »

I recently cleaned the oil cooler w carb cleaner, the black sludge eventually dried to these black flakes.
20200812_120121.jpeg
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1965 Corvair Monza Coupe 110, 4 speed, Liberty Blue

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azdave
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Re: Oil filter / cooler bypass valve

Post by azdave »

Mcwho wrote:
Wed Aug 12, 2020 8:25 am
How does it work, pressure or temp. How do i test it?

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There are spring-loaded pressure disc valves that allow oil to bypass the filter and cooler when the filter is blocked or oil is too thick and won't flow. You can't really test them easily except to make sure they are not stuck open or closed. There is no temperature control system used to bypass the oil cooler if the oil is too cold. Engine temps and oil temps are all regulated as one by the air exit doors and their thermostats for 61-69 models. 60's only used a blocking ring at the blower fan to control engine temps.

Yup. You will get a ton of junk out of the oil cooler when you flush it. I soak them for days with Oil Eater or Simple Green and then give them a shake in an ultrasonic cleaner.
Dave W. from Gilbert, AZ
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5

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Mcwho
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Location: DeBary FL

Re: Oil filter / cooler bypass valve

Post by Mcwho »

I filled them with carb cleaner and after hours of soaking poured out a black greasy liwuid. Did that at least a dozen times. There was nothing that came out of the oil cooler that looked like oil.

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1965 Corvair Monza Coupe 110, 4 speed, Liberty Blue

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Mcwho
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Location: DeBary FL

Re: Oil filter / cooler bypass valve

Post by Mcwho »

So the only thing the valve does is tKe the cooler out of the circuit and the filter and the rest of the oil system works as normal? Just hotter oil.

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1965 Corvair Monza Coupe 110, 4 speed, Liberty Blue

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azdave
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Re: Oil filter / cooler bypass valve

Post by azdave »

Mcwho wrote:
Thu Aug 13, 2020 9:28 am
So the only thing the valve does is take the cooler out of the circuit and the filter and the rest of the oil system works as normal? Just hotter oil.
(Some of my earlier post may have been written less clearly than I intended so I edited the wording slightly.)

Yes. In effect, the bypass valves (discs) in the oil filter/alternator adapter and the top of the rear housing serve to let oil bypass the filter or the cooler so that you will always get some oil to the engine even when the filter or cooler is not passing enough oil. It is a failsafe to keep oil flowing. Unfiltered or hot oil delivered to the bearings is better than none at all.
Dave W. from Gilbert, AZ
65 Corsa 140/4
66 Corsa 140/4
66 Corsa 140/4 w/factory A/C
66 Corsa 455 Toro V8
65 Monza Convertible 110/4
66 Monza Convertible 140/4
65 Monza 4DR 140/PG w/factory A/C
65 Monza 4DR EJ20T/5

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