Logo
FULL SITE MENU

Strange roar from 57 OSiGF

S

snowhound9

New member
"A new season, a new issue. I

"A new season, a new issue. In the off-season, the boat builder (who had my boat for some warranty work) noticed a oil leak from the outdrive - I believe it was the trim oil. A seal was replaced (I don't have any more information on that repair at this point).

Splashed the boat today, running it to the slip, the engine sounds completely different than last year. Last year in gear at minimum throttle, you could barely hear the engine. This year, there is a perceptible "roar" coming from the engine. In the short (~15 minute) run, the engine came up to temp, and there were no apparent issues. We did not push it at all, though. I restarted the engine later in the slip, and in neutral, at idle, the roar could still be heard, although it was not as load. It seems to be coming from the lower back of the engine. The space is tight, and I did not notice any exhaust in the engine compartment.

Any ideas as to what this might be, or additional things I should look for? This is the 4th issue with this brand new engine. I guess it's a good thing there's a 2 year warranty.

Thanks,

Mark"
 
"Assuming no internal engine p

"Assuming no internal engine problems and that it is timed properly, I would suggest looking into the gimball bearing. They tend to prodcuce a 'growling' noise as they go bad.

You can make up a stethescope to try to pinpoint the location of the problem. Attach a metal rod to a standard stethescope and use it to probe around."
 
"Just to follow up on this, it

"Just to follow up on this, it WAS a problem with the gimball bearing (good call, Mike!). The reason that the bearing had gone bad was a tear in the exhaust boot. Here's where it gets dicey. The mechanic says that, in general, this occurs when the engine is run with the drive up. However, I am 99.44% sure this never occurred last year - I never did it, and the only other person to run the boat was another Volvo-certified mechanic who fixed the fuel pump and steering ram issues.

However, my boatbuilder says that Volvo has admitted having problems with the bellows on XDP drives tearing "on their own", and letting water in which damages the gimball bearing (only on gasoline engines). So the question now is whether or not Volvo is going to warranty this claim. As an aside, I guess they are doing away with the XDP drives starting next year.

Mike - thanks again for your advice.

Mark"
 
"Hey Kirby,

Nice post, I th

"Hey Kirby,

Nice post, I thought I was the only one with the exact same gimball bearing problems. Bearing and bellows have been replaced 3 times. I was given the same excuse about running drives in up position. A bunch of B.S. though.I have twin 8.1s. That is the first I have heard about discontinuing drive production.Volvo sure has not impressed this previous Mercrusier owner!!!"
 
"It turns out that the bellows

"It turns out that the bellows problem has been acknowledged by Volvo; apparently, there is a service bulletin out on it. I can only hope that the new bellows they installed on mine fixes the problem permanently, and I'm not going through this goat rodeo again next year.

Interestingly, the one of the other problems I had with the 5.7 OSi - steering - has also been reported as a common problem with the engine/drive.


Mark"
 
"If you don't mind me aski

"If you don't mind me asking, what kind of steering problem did you have? I have a 2006 5.0 OSI, I am having some shifting problems right now but I'm hoping the cables just need adjusted, anything else I should be looking for? Will a visual inspection of the bellows help? Bummer all these issues are coming up, I could only find good comments before I purchased the boat last year.."
 
"The steering ram failed outri

"The steering ram failed outright. There was some discussion around the marina that this sometimes happen when the fuel pump is replaced (my previous repair), but given the additional information, I doubt that's what happened. Basically, the boat went from steering like a Mercedes to steering like my grandfather's 1960's John Deere tractor. It was obvious that something was haywire as soon as I left the slip.

Saddest part of it is that they had to pull the boat to fix it. Hopefully, your problem is not as serious.


Mark"
 
Back
Top