Low oil psi 454 500HP
05-02-2011, 08:36 PM
#23
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40 weight, when i took of intake manifold i notieced a loose push rod, could loose push rods be messing up oil pressure?
I was able to get the valve cover off with exhasue manifold still on so i am going to start the motor and adjust valves while running, the zero lash and half turn must have not done it properly, plus a lifter could have collapsed
I was able to get the valve cover off with exhasue manifold still on so i am going to start the motor and adjust valves while running, the zero lash and half turn must have not done it properly, plus a lifter could have collapsed
05-02-2011, 10:28 PM
#25
Yes mechanical and electric are both the same, i read about the ones under cam sprocket today and intake that is our next step.. Appreciate all the help guys...
The motor is a generation 6 with morel lifters and new pushrods.
The motor has only ran on a trailer 4 times now for 5 min sessions mainly cheacking this issure.
The boat is not in the water so there cant me cavitations issues, motor is basically level
The original oil pump was damn near laying on the bottom of pan, we riased it up a **** hair (3/8) lol and re shaped pan a bit..Again original pump ran like a bat out of hell before rebuild.
We checked main tolerances when installing but they were fine before we rebuilt anyway. Motor only cam out to get new head and cam , but then said **** it and bored it .030 and through domed pistons in it with cometic gaskets .027 I think to got 9.3:1 compression. Has new timing chains thats why i cant see it missing oil galley plugs but well see, any one have pics of these plugs???????????/? thanks Adam
The motor is a generation 6 with morel lifters and new pushrods.
The motor has only ran on a trailer 4 times now for 5 min sessions mainly cheacking this issure.
The boat is not in the water so there cant me cavitations issues, motor is basically level
The original oil pump was damn near laying on the bottom of pan, we riased it up a **** hair (3/8) lol and re shaped pan a bit..Again original pump ran like a bat out of hell before rebuild.
We checked main tolerances when installing but they were fine before we rebuilt anyway. Motor only cam out to get new head and cam , but then said **** it and bored it .030 and through domed pistons in it with cometic gaskets .027 I think to got 9.3:1 compression. Has new timing chains thats why i cant see it missing oil galley plugs but well see, any one have pics of these plugs???????????/? thanks Adam
"reshaped the Pan a bit"??????
How much oil do you have in it? Too much oil can make it have low Oil Pressure as well as not having enough
05-03-2011, 12:21 AM
#26
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You stated this was originally a 330. Was there such a thing as a 330 gen 6? Is this carb or fuel injection? Also see you have 781 heads which are mark lV heads.
Eliminator28, you stated that too much oil can make it have low oil pressure. Can you elaborate on this.
Eliminator28, you stated that too much oil can make it have low oil pressure. Can you elaborate on this.
05-03-2011, 08:39 AM
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I've never had it happen to me, but I think a bad lifter could create a major internal oil leak.
Last edited by blue thunder; 05-03-2011 at 08:45 AM.
05-03-2011, 11:01 AM
#29
Like Blue Thunder said.. With the oil level too high the crank counterweights hitting the oil will airate it, making OP eratic.
05-03-2011, 12:23 PM
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IMHO, I would take a few steps back at this point and go back to triple checking bearing clearances on the mains and rods. You are looking for a simple smoking gun and not finding it. I know you want to be in the water tomorrow, but it will be easier to find the problem by checking all the what if's now rather than blowing it up later. Just my .02
