PCM ZR6 Burning oil/smoke in engine compartment

[parkcityxj]

Hey guys,

2004 22V with the 6.0 ZR6, closed cooling.

I'm having issues with burning oil somewhere off the block. There is very little visible smoke to track down but the smell is strong. I'm also getting a weird boiling/popping sound that happens even when the boat is turned off, can't tell where the sound is coming from..

I had guy come up this evening who works at a shop and he was stumped.

• Boat runs great
• I am consuming oil
• No missing or timing issues
• Oil pressure around 40-50, goes to 70 or so under full throttle
• Coolant temps are fine
• Very little white smoke from exhaust at take off. Otherwise no other smoke from exhaust.
• Boat ran fine last season, this is a new problem that happened first time on the water this year
• Risers and manifolds do not seem abnormally hot but the starboard side is a bit hotter
• Very slight trickle from riser gasket

Any ideas? Thanks!!

[freeheel4life]

Best guess is valve covers leaking oil onto hot exhaust manifolds.
I have never seen an 04 with a PCM zr6. Feel like early 2000s was Merc, then marine power, then PCM. Hopefully someone can set me straight or it's a swapped motor because I am confused.

[parkcityxj]

Best guess is valve covers leaking oil onto hot exhaust manifolds.
I have never seen an 04 with a PCM zr6. Feel like early 2000s was Merc, then marine power, then PCM. Hopefully someone can set me straight or it's a swapped motor because I am confused.

I'm really crossing my fingers it's something easy like the valve cover gaskets. The ZR6 was an option, I've seen a few 22V and 24V with them although rare.

[parkcityxj]

I pulled my pcv valve and it was clogged, I cleared it by blowing it but I’m not seeing anything inside it valve wise.

[parkcityxj]

Well, ran it on the hose in the driveway for over 20 min and there was zero smoke and some very faint smell. I thinking it might have solved the problem, however only a lake test can tell.

[talltigeguy]

Best guess is valve covers leaking oil onto hot exhaust manifolds.
I have never seen an 04 with a PCM zr6. Feel like early 2000s was Merc, then marine power, then PCM. Hopefully someone can set me straight or it's a swapped motor because I am confused.

Taylor's boats in Salt Lake ordered most of their Tige boats with PCM engines at that time. It was an option from the factory. I am not sure what they had against Merc or MP, but that is what I have seen. My guess is that the boat was born in Northern Utah.