I know this is a boat engine, but the engine is really an L83 Chevy 5.3L marinized by Malibu / Axis boats.
The boat is brand new and would idle at 40psi and over 2000rpms would go up to about 60psi all normal.
The dealer came out and did the breaking service, where they replace the oil filter / oil / check for metal shavings in the tranny, etc.... at 25hours.
After this service, we noticed the oil psi gauge reading much higher.
Cold crank, idle 60psi
Engine warm (160F), idle 60psi
Engine warm (160F), 2000+rpm pegged at 80psi (highest the needle goes).
Engine warm (160F), about 25mins after running it 2000+ rpm, idle drops to 40psi
Engine warm (160F), about 45mins after running it 2000+ rpm, psi seems to level out back to 60psi.
I informed the dealer and they reached out to malibu and said high PSI reading happen when engine is overfilled. So we drained about 5.5qt (8qt total) on the lift using a dipstick pump, and refilled making sure not to pass the FULL line on the dip stick. Even with the dipstick reading 1/2 way between ADD and FULL same readings.
The dealer also informed me yesterday that they have now seen this on several other new boats after doing the break in service.
The dealer replaced the oil filter during the breaking service wit ha Hgnst filter, so I was thinking of replacing that with a WIX or NAPA version of the filter.
The manual for the engine / engine oil cap both state to use 5w-30, while i know the L83 engine from chevy says 0w-20.... but oil being hydraulic i dont think that would affect PSI?
Grasping at straws here, dealer said no issue running it as long as the pressure normalizes, but they are continuing to inquire with the manuf.
The boat is brand new and would idle at 40psi and over 2000rpms would go up to about 60psi all normal.
The dealer came out and did the breaking service, where they replace the oil filter / oil / check for metal shavings in the tranny, etc.... at 25hours.
After this service, we noticed the oil psi gauge reading much higher.
Cold crank, idle 60psi
Engine warm (160F), idle 60psi
Engine warm (160F), 2000+rpm pegged at 80psi (highest the needle goes).
Engine warm (160F), about 25mins after running it 2000+ rpm, idle drops to 40psi
Engine warm (160F), about 45mins after running it 2000+ rpm, psi seems to level out back to 60psi.
I informed the dealer and they reached out to malibu and said high PSI reading happen when engine is overfilled. So we drained about 5.5qt (8qt total) on the lift using a dipstick pump, and refilled making sure not to pass the FULL line on the dip stick. Even with the dipstick reading 1/2 way between ADD and FULL same readings.
The dealer also informed me yesterday that they have now seen this on several other new boats after doing the break in service.
The dealer replaced the oil filter during the breaking service wit ha Hgnst filter, so I was thinking of replacing that with a WIX or NAPA version of the filter.
The manual for the engine / engine oil cap both state to use 5w-30, while i know the L83 engine from chevy says 0w-20.... but oil being hydraulic i dont think that would affect PSI?
Grasping at straws here, dealer said no issue running it as long as the pressure normalizes, but they are continuing to inquire with the manuf.