 initial cranking oil pressure, what have you seen |
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| type11969 |
 Jun 16 2009, 10:00 PM
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#1
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Senior Member  Group: Members Posts: 1,231 Joined: 2-December 03 From: Collingswood, NJ Member No.: 1,410 Region Association: North East States  |
Getting ready to fire up my rebuilt t4 in my bus, went through the process of cranking to build oil pressure and I am seeing about 5 psi . . . enough to turn the oil light off. Has anyone ever put a gauge on their engine during initial cranking to see what they get? Curious about the numbers.
Thanks, Chris |
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Replies(1 - 4)
| Jake Raby |
Jun 16 2009, 10:07 PM
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#2
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
We usually see 20-30 PSI but thats according to many variables.. Are you using Brad Penn Break in oil??
Do you have the spark plugs pulled?? If not the engine won't spin faster than 200 RPM and that'll really hurt the initial oil pressure |
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| type11969 |
Jun 16 2009, 10:14 PM
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#3
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Senior Member Group: Members Posts: 1,231 Joined: 2-December 03 From: Collingswood, NJ Member No.: 1,410 Region Association: North East States |
Hey Jake, just emailed Blake but was itchin for an answer. Spark plugs are pulled and I am using 30wt break-in Brad Penn . . . What do you think? 5psi seems low but my starter motor could be worn. No tach hooked up right now, unfortunately.
Also the pressure doesn't hold for very long. -Chris |
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| Jake Raby |
Jun 17 2009, 09:12 AM
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#4
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
You should have mentioned you had the rockers pulled.. Thats where all the oil pressure bled out to :-)
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| type11969 |
Jun 17 2009, 09:24 AM
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#5
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Senior Member Group: Members Posts: 1,231 Joined: 2-December 03 From: Collingswood, NJ Member No.: 1,410 Region Association: North East States |
Yeah, I'm an idiot. Seems like having the lifters in place should block enough of the flow to build more pressure but I guess not. Maybe one or more of them were pushed out by the pressure to open up the galley fully. It will be interesting to see what happens tonight.
Thanks, Chris |
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