Crankcase Pressure/Dipstick Popping out
Posted 11 September 2021 - 07:45 PM
When I installed the head and got it warmed up for the first time, the compression was between 144-150 PSI, and held long enough for me to walk the long way around the car to read the pressure gauge, so I feel like it's not a ring issue. I also checked the PCV in the valve cover, verified it was pulling a vacuum with my finger with the engine at idle.
From my research, that leaves my stock oil separator. I pulled it out, soaked it in diesel for a week, cleaned it out, and reinstalled; no difference.
At this point, I'm wondering if it's due to the way the separator is hooked up. Currently, the L-shaped port on the side is going to the valve cover, the bottom port is going into the oil pan, and the top port is open to the air due to the aftermarket cone filter/intake piping. Could this be my issue?
For the record, this is a symptom I've been noticing since I got the car. It's also running quite rich at idle most of the time (10:1 AFR); I'm not convinced it's related, just thought I'd mention it.
Posted 11 September 2021 - 10:33 PM
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Posted 12 September 2021 - 06:36 AM
Posted 12 September 2021 - 06:57 AM
Posted 12 September 2021 - 11:35 AM
I removed my dipstick ... got a small thin piece of sheet metal and made a little "tab holder" out of it. There's a mounting tab on the dipstick that you and drill a hole through and use a screw or bolt to attach the tab.
I cut a recess in the sheet metal so it holds the dipstick in place.
Here it is in the car. The sheet metal is pliable enough that I can just pull it back when I want to remove the dipstick.
1988 Conquest TSi ...
1987 Conquest Flatty ...
1987 Conquest TSi ...
1999 Eclipse 4G63 ... heavily modified.
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Posted 12 September 2021 - 05:28 PM
I'll try to get it hooked up there, but I'm not immediately sure how since the intake piping to the turbo is custom so it doesn't have a port I could use. Can't weld (yet), so I'm thinking maybe drill a hole+tap a threaded port, if such a thing exists?
If I figure it out, though, will that extra vacuum also solve the pressure I'm feeling through the oil cap at idle? Or should that all be taken care of by the PCV (given no blow-by)?
Posted 13 September 2021 - 11:51 AM
Posted 13 September 2021 - 03:11 PM
Another option is to delete your PCV entirely. Use a dual can setup and a vacuum pump to keep the crankcase in vacuum at all times. If the stick keeps popping out then your rings are probably on their way out.
Posted 13 September 2021 - 04:09 PM
Posted Yesterday, 09:49 AM
Now that I've done some actual searching for vacuum port solutions, I found this. Looks like it should work perfect to get my separator hooked up like it's supposed to: https://www.jegs.com.../87071/10002/-1
I'll also try finding a good O-ring for the dipstick. Unfortunately I won't be able to test anything soon; looks like I might have a fuel delivery issue preventing the car from running right now. I'll update once I get everything sorted. Thanks for the help.
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