Re: Oil Past The Lifters
[Re: 71birdJ68]
#3067145
08/11/22 07:38 PM
08/11/22 07:38 PM
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Joined: Mar 2011
Posts: 3,077 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,077
Michigan
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When you say picture are saying take the lifter out for a picture? With a lifter on its base circle (lowest point in its travel) see if the center band of the lifter is exposed below the lifter bore. If so that’s likely where your problem is.
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Re: Oil Past The Lifters
[Re: 71birdJ68]
#3067187
08/11/22 09:35 PM
08/11/22 09:35 PM
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Joined: Mar 2011
Posts: 3,077 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,077
Michigan
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This is a bushed alum block. I just put a new roller cam and solid bushing roller lifters in. I was finishing up with the prime. A bushed block and you have oil leaking past the lifters? I take it the bushings have been drilled ?
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Re: Oil Past The Lifters
[Re: A727Tflite]
#3067191
08/11/22 09:55 PM
08/11/22 09:55 PM
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Joined: Feb 2012
Posts: 4,454 Morristown Tn.
71birdJ68
OP
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OP
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Joined: Feb 2012
Posts: 4,454
Morristown Tn.
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Yes, they are drilled. I just checked and the top of the lifter is just barely below the top of the bore when the lifter is all the way on its down stroke. What I'm wondering is, how much bypass is to much?
Last edited by 71birdJ68; 08/11/22 10:04 PM.
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Re: Oil Past The Lifters
[Re: Sniper]
#3067345
08/12/22 01:16 PM
08/12/22 01:16 PM
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Joined: Aug 2003
Posts: 43,195 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,195
Bend,OR USA
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Aluimnum grows when heated which makes me think it will leak less around the ilfter warm and hot I'm sure your lifters aren't causing the leaks around the roller wheels at the bottom of the bodies like a stock unbushed block can Holes get bigger when the material they are in warms up. So odds are they would leak more when warmed up. I'm thinking when they grow,the block, it will expand and the lifter holes will get smaller in diameter, not larger I'll try and remember to test my new aluminum KB wedge block with some heat in the lifter valley to find out if they shrink or get larger in diameter confused: work: I'm thinking the block also grows more in height when warmed up more than the steel cylinder sleeves do also raising the heads up also so maybe I should make the piston deck height higher to compensate for the block deck height increase when hot
Last edited by Cab_Burge; 08/12/22 01:21 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Oil Past The Lifters
[Re: Cab_Burge]
#3067400
08/12/22 04:48 PM
08/12/22 04:48 PM
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Joined: May 2019
Posts: 713 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 713
Lake Villa Il
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I'm thinking when they grow,the block, it will expand and the lifter holes will get smaller in diameter, not larger Definitely the other way around
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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Re: Oil Past The Lifters
[Re: 71birdJ68]
#3067431
08/12/22 07:03 PM
08/12/22 07:03 PM
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Joined: Oct 2005
Posts: 270 Anchorage, Alaska
metallicareload
enthusiast
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enthusiast
Joined: Oct 2005
Posts: 270
Anchorage, Alaska
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Can anybody tell me how much is to much? It seems kinda subjective to me, other than what is your lifter to bore clearance? How much PSI are you getting when priming? I find it hard to believe that bushed lifters would have excessive clearance and find it even harder to believe bushed lifter bores would be exposing the oil band could you post a video? FWIW my 440 seems to leak a “lot” but it made at least 45 psi on the engine stand. It only makes 15 or so psi at hot idle Shop that built the short block attribute the low oil pressure to loose bearing clearance. I think leakage around the lifters is part of it also. I did restrict oil to the drivers side lifter galley (solid roller)
440, 4-Speed, 3.54 1968, when Dinosaurs ruled the Earth
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Re: Oil Past The Lifters
[Re: metallicareload]
#3067454
08/12/22 08:10 PM
08/12/22 08:10 PM
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Joined: May 2019
Posts: 713 Lake Villa Il
INTMD8
super stock
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super stock
Joined: May 2019
Posts: 713
Lake Villa Il
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Yes, what is lifter to bore clearance?
Agreed that some photos/video would help.
Surprised to hear it's a gusher with bushed bores. I'm running solid roller in an unbushed block. .0015 clearance and oil leakage around the lifter during priming seemed minimal to me but I guess that is subjective. No restrictors and pushrod oiling.
1100 rpm idle was 49psi with 20-50 and now 41psi with 5-30
69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700
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