Oil pressure loss
Hey guys!
So here’s the concern- I did my first WOT pull on a new motor yesterday, dropped back down into the no-wake and my oil pressure at in gear idle was hanging around 3-5 pounds. A little background... there’s about 2 hours on this engine. It’s a 468, 4 bolt, cast crank, flat top pistons, Comp 262/268 112° Flat tappet cam, roller tip rockers, double valve springs on peanut heads. I’ve got Sierra 25-40 oil in there with 2 bottles of Lucas break in zinc additive. Did the cam break in at 2500 for 25 minutes. My WOT run was under 7 minutes with 60 PSI at 4600, 155°. I tied up for an hour after, then when I went to trailer up I had 40 pounds at idle headed back to the dock. No hose blow ups in the engine space, cooler, hoses & remote filters are all happy. Any ideas what happened there? Thanks for any input! |
My WOT run was under 7 minutes with 60 PSI at 4600, 155
155 WATER TEMP OR oil TEMP? HUGE DIFERENCE. |
155 was water temp while under throttle.
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Verify with mechanical gauge
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Originally Posted by GLENAMY 242SS
(Post 4756921)
My WOT run was under 7 minutes with 60 PSI at 4600, 155
155 WATER TEMP OR oil TEMP? HUGE DIFERENCE. |
Is your oil cooler new or from previous motor?
Chris |
Remove and Cut filter apart before running it again with mechanical gauge , if nothing found in filter.
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Originally Posted by SB
(Post 4756941)
Remove and Cut filter apart before running it again with mechanical gauge , if nothing found in filter.
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Sounds like your oil cooler is undersized. Some oil filters have a paper medium non friendly for marine use that swells and chokes the system, but my guess is your oil got cooked.
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Thanks for all the input!
Sounds like a bigger cooler is in order. I’m just running an OE Merc cooler then taking off with -10 AN hose to a Deralé dual remote filter housing. I’ve just got some low-end O’reilly filters on there now but will switch to Wix racing tall filters after I change out the break in oil. |
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