Manifold to riser gasket 3.0

[Ccuddey]

Ok guys after having water in the oil, I took the head in to the machine shop had it decked and magnufluxed everything came back fine. So put all new exhaust gasket, head gasket and exhaust manifold to elbow riser gasket. After putting all of it back together still getting water in the oil. So after doing a little more research decided to pull it all apart and have the block checked at the machine shop. It came back fine as well.

So after extensive research I found that the metal plate that goes between the exhaust manifold and the exhaust elbow riser could be installed wrong. I installed it the way the gasket was labeled. It had markings saying up and front. So i put it up and towards the front of the engine. Called north Texas marine (a volvo specialist) they claim that there was indeed a bulletin that stated that the plate is misidentified and there was a new installation procedure. Problem is that wouldn't tell me what that procedure is.

Sorry for the long back story but I firmly believe a good answer is knowing all the details.

So my questions.

What is the proper way to install this gasket?

Looks all symmetrical to me so if it was upside down and backwards could it be the culprit to water in my oil?

And last if it's not that, what am I missing?

 

[Ccuddey]

Re: Manifold to riser gasket 3.0

Bumpity bump bump

Need some assistance here guys. Planning on doing this tonight and ccan't figure out how this gasket is supposed to go on or if it is even my problem. Help!

 

[Bondo]

Re: Manifold to riser gasket 3.0

Bumpity bump bump

Need some assistance here guys. Planning on doing this tonight and ccan't figure out how this gasket is supposed to go on or if it is even my problem. Help!

Ayuh,... Welcome Aboard,.... I donno much 'bout Volvos, but that water from that gasket has to pass through the cylinders, past the rings, to get to the base,...

Unless yer seein' Rust trails in the top end, I'd be 2nd guessin' the cracked block inspection results,...

Was it Pressure tested,..??

 

[Ccuddey]

Re: Manifold to riser gasket 3.0

The block was pressure tested. I have not checked the manifold or the elbow as I am a car mechanic and not a boat mechanic. Didn't realize that water could enter through those areas until further research.

The symptoms of mine are after being on the lake I checked the oil and it was just barely noticeable that the oil was starting to get water in it. Not high on the dipstick or anything. After letting it sit overnight I checked the oil and it was really noticeable and milky. Leading me to belive that the water is getting on top of the pistons and then leaking past the rings as it sits over night. Meaning that the water is coming from above. The boat does not smoke or overheat, runs great and you wouldn't notice until you Checked the oil. water could be coming from a crack in the cylinder walls but iI'm sure the machine shop would have caught that. Iddon't think the water is coming in anywhere near the crankcase. I would put big money that it is coming from exhaust since the head and block have both been checked.

Places I still have to check are..

Exhaust manifold

Exhaust riser

The metal restrictor plate between them

The back flow flap or whatever it's called

I was just wanting to start with exhaust restrictor plate dirsfirst since I know it carried water through it as well as I know it isn't installed right because I did it according to the way it was labeled which isn't right. That's why I'm wanting the correct way. Just trying to rule everything out before I take the block back out and do it all over again.

 

[bruceb58]

Re: Manifold to riser gasket 3.0

Did you use Volvo OEM gasket?

http://www.marinemechanic.com/volvo/volvo/2010/25-1-16_A[1]risergasket.pdf

I would let it sit a bit after stopping the engine and rotate the engine with spark plugs removed and see if there is any water.

 

[Ccuddey]

Re: Manifold to riser gasket 3.0

Everything was ordered through north Texas marine and oem parts used. I also at the time rebuilt the lower unit and installed a new seal, gimbal bearing, and did a modification to the gimbal lube tube, removed it and put a 90 degree zirk In its place so the plastic tube would no longer be a problem.

Regardless I'm still looking to see if anyone knows the procedure for installing the exhaust plate/gasket/restrictor. I appreciate everyone's response but before I take it out tomorrow I would like to change the oil, flip the gasket right, and see if I just get lucky.

 

[robbyr1]

Re: Manifold to riser gasket 3.0

Ccuddey, what did you find out? I'm in the same boat (pun intended). I had my restrictor on the wrong way (per the label) and I'm hoping that is my milky oil problem. Thanks,
Rob

 

[Ccuddey]

Re: Manifold to riser gasket 3.0

I have since taken the top end apart once more. When taking a part I took the plugs out first to pump the water out of the cylinders. There was a ton of water in all four cylinders. Telling me it couldn't be a cracked block. And having already had the head checked and decked I knew it had to be exhaust side issue. So i called volvo which they informed me my restrictor was 180 degrees backwards. So on yours you will just make the front point towards the back. Basically with it the other way you are immediately blocking the raw water going to the elbow and forcing it back though the other way. What's sad is volvo knows this is an issue but even after buying a brand new restrictor it is still identified wrong. BBut no worries just turn 180 degrees.

Now as far as if it is the fix for milky oil I do not know. Seeing as I head the manifold checked and it was cracked I replaced both at the same time. I know that the manifold was definitely letting in the water into the cylinders. However there is no telling why it was cracked to begin with. Boat was winterized, low hours, never overheated, and never on salt water. So my assumption is the plate forced the water through the wrong direction and with enough force it cracked since there wasnt a free flow of water. It also helps to note the manifold was cracked internally and not externally pointing me to the direction of the restrictor plate being the issue even more.

So if it were me I would remove the manifold and elbow . And have the manifold checked. You can check it yourself I home but I took mine to a shop. Then If it turns out good or bad I would act accordingly and definitely reinstall the plate the correct way. Worse case if the plate doesn't fix it youre only out a manifold gasket and the two gaskets that go on the plate and a couple hours of labor. But if it does fix it you will save yourself a whole lot of trouble.

 

[robbyr1]

Re: Manifold to riser gasket 3.0

Great info Ccuddey, thanks a lot! I am going to work on it tomorrow, wish me luck & good luck to you. Have a great weekend!