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> 6-cyl folks - oil line check valve
Optimusglen
post Jul 24 2021, 09:16 AM
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I'm in the process of installing my 6 and have come to the oil lines. My entire setup is planned as AN-12, and I see options for AN12 one-way check valves from a number of retailers.

One example: https://www.jegs.com/i/JEGS/555/150024/1000...KEaAnyVEALw_wcB

I have seen the threads on here and on Pelican about the Rothsport valve, but the price and the lack of AN fittings have drawn me away from it.

Is there some other reason that someone should fork out 300 for the Rothsport unit?
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9146C
post Jul 26 2021, 12:05 PM
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When I was completing my "rustoration" project and re-installing my 2.7L, I was debating installing one of these (Rothsport) check valves.

My motor had less than 10,000 miles when it was re-installed in my finished project.

I had only ever had one instance of "smoke" (no external oil leaks) in the time I've had the motor installed (prior to rebuilding my car) and opted not to proceed with the check valve. I have not had any issues in the last 3-4 months that I've again begun driving the car.

When I was researching the Rothsport valve, I recall reading a comment somewhere that it is better to have a "prime" on the pump when the motor is started from cold...sounds logical...is it true? Who knows? The argument went further to say that a check valve would (or could) prevent the pump from having this initial prime, and may, in theory prolong low/no oil pressure immediately following engine start-up. Again, it is likely a theory with little or no merit. I did not find any data to support the claim either way.

In my simple way of thinking, an oil accumulation in the engine case (during shutdown, prolonged non-use) is the result of the (excessive) clearance of the oil pump bleeding through. Yes, oil viscosity, ambient temperatures, etc all play a factor. In my case, my oil pump was brand new when I rebuilt the motor so I don't expect to have any issues (with start-up blue) for a long time to come. That sentence is not meant to say/imply that a used pump cannot be rebuilt to factory tolerances.

I may be way off base with my assumptions and observations, but, I'm in the camp of others here with try it if you need it. IMHO, the check valve is merely a "band-aid" for an oil pump that is (beginning) showing signs of wear.
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Optimusglen   6-cyl folks - oil line check valve   Jul 24 2021, 09:16 AM
Mark Henry   Is there some other reason that someone should f...   Jul 24 2021, 09:32 AM
Optimusglen   Is there some other reason that someone should ...   Jul 24 2021, 09:40 AM
Retroracer   Glen - humbly suggest that you COULD hold off for ...   Jul 24 2021, 09:42 AM
Optimusglen   Also a good point, I had my oil pump rebuilt by He...   Jul 24 2021, 09:50 AM
mlindner   I'm with Mark Henry. I also installed a Rothpo...   Jul 24 2021, 11:11 AM
fixer34   I'm with Mark Henry. I also installed a Rothp...   Jul 25 2021, 11:32 AM
porschetub   I'm with Mark Henry. I also installed a Roth...   Jul 25 2021, 06:42 PM
Mark Henry   I agree I would wait to see if you have this issue...   Jul 24 2021, 03:42 PM
JmuRiz   Good to know, I’ll do the same when my engine ge...   Jul 24 2021, 07:06 PM
mepstein   I would get it if you need it but don’t assume y...   Jul 25 2021, 07:15 PM
mb911   It's interesting how each engine is different....   Jul 26 2021, 06:02 AM
jd74914   Not a /6 guy, so giving my unsolicited opinion her...   Jul 26 2021, 09:36 AM
mepstein   Not a /6 guy, so giving my unsolicited opinion he...   Jul 26 2021, 09:40 AM
ClayPerrine   Not a /6 guy, so giving my unsolicited opinion he...   Jul 26 2021, 11:29 AM
mb911   Not a /6 guy, so giving my unsolicited opinion h...   Jul 26 2021, 11:44 AM
jd74914   The Porsche engineers disagree with you. They use...   Jul 26 2021, 10:01 AM
PanelBilly   I’m not using one either. Maybe there’s a litt...   Jul 26 2021, 10:01 AM
9146C   When I was completing my "rustoration" p...   Jul 26 2021, 12:05 PM
fixer34   When I was completing my "rustoration" ...   Jul 26 2021, 04:52 PM


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