Crank Seal leak and low Oil Pressure ?
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![Question](https://www.miataturbo.net/images/icons/icon5.gif)
Hey,
While getting the Base Map dialed in with My Turbo Miata on Jackstands It had an Oil Leak at the Crank Seal. presumably from Crankcase Overpressure due to a bad PCV Valve. I've since upgraded to a 323GTX Valve and replaced the Crank Seal with an Aftermarket one.
I only Ran the Car once since and noticed a few Droplets on the Oil Pan but not nearly as much as before. However, today I noticed after letting my Car come up to Operating Temps that my Oil Pressure started Dipping before Dropping into the 20s (1992 Tach) and Oil Started Pooling underneath the Car again.
I Coudn't realy determine the cause of the Leak 100% the first time but It seemed to be the Crank Seal and Like I said, It got better breafly after I replaced it.
My Question now is If it's normal for the Oil Pressure to drop like that when The Crank Seal leaks?
Im definitely going to Order a OEM Seal now, but maybe there is something else wrong here ?
Edit: Before I bought the Car the Previous Owner apparently had resealed the whole Car and most likely forgot the Oil Pump O Ring before abandoing the Project![likecat](https://www.miataturbo.net/images/smilies/likecat.png)
However, I can't confirm this until I Pull the Pump.
Next Update, I removed the Plastic Covers and Cleaned off all the Old Oil. When I pulled the bottom cover I noticed a lot of Red RTV "Shavings" around the Crank cut out. With the Covers removed I let the Car get up to operating temps again and saw the Oil literally being pressed from the Oil Pan Gasket Surface. Before I put my Engine In I gave it a Clean and apparently the Red Silicone RTV I used will literally desolve with Everything that One would use to clean Off Oil, I used Hydraulic Cleaner that is safe for O- Rings and such on heavy Equipment that sees a lot more Oil Pressure... Anyways, dont use the Red Stuff.
I fixed 4 bad Spark Plug shaft O-rings on My Dayli before by smearing some Black RTV on the inside of the Spark Plug holes between the Valve Cover and Head, its been holding up for Over 3 Years now so I might try that temporarily to Isolate the Problem further since Oil Leaks can "Travel" and appear to be somewhere else then where they actually are.
While getting the Base Map dialed in with My Turbo Miata on Jackstands It had an Oil Leak at the Crank Seal. presumably from Crankcase Overpressure due to a bad PCV Valve. I've since upgraded to a 323GTX Valve and replaced the Crank Seal with an Aftermarket one.
I only Ran the Car once since and noticed a few Droplets on the Oil Pan but not nearly as much as before. However, today I noticed after letting my Car come up to Operating Temps that my Oil Pressure started Dipping before Dropping into the 20s (1992 Tach) and Oil Started Pooling underneath the Car again.
I Coudn't realy determine the cause of the Leak 100% the first time but It seemed to be the Crank Seal and Like I said, It got better breafly after I replaced it.
My Question now is If it's normal for the Oil Pressure to drop like that when The Crank Seal leaks?
Im definitely going to Order a OEM Seal now, but maybe there is something else wrong here ?
Edit: Before I bought the Car the Previous Owner apparently had resealed the whole Car and most likely forgot the Oil Pump O Ring before abandoing the Project
![likecat](https://www.miataturbo.net/images/smilies/likecat.png)
However, I can't confirm this until I Pull the Pump.
Next Update, I removed the Plastic Covers and Cleaned off all the Old Oil. When I pulled the bottom cover I noticed a lot of Red RTV "Shavings" around the Crank cut out. With the Covers removed I let the Car get up to operating temps again and saw the Oil literally being pressed from the Oil Pan Gasket Surface. Before I put my Engine In I gave it a Clean and apparently the Red Silicone RTV I used will literally desolve with Everything that One would use to clean Off Oil, I used Hydraulic Cleaner that is safe for O- Rings and such on heavy Equipment that sees a lot more Oil Pressure... Anyways, dont use the Red Stuff.
I fixed 4 bad Spark Plug shaft O-rings on My Dayli before by smearing some Black RTV on the inside of the Spark Plug holes between the Valve Cover and Head, its been holding up for Over 3 Years now so I might try that temporarily to Isolate the Problem further since Oil Leaks can "Travel" and appear to be somewhere else then where they actually are.
Last edited by pascal.1605; 05-05-2024 at 01:07 PM.
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