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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel > Volvo MD 2B
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Thread: Volvo MD 2B Reply to Thread
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Topic Review (Newest First)
01-29-2013 01:53 PM
SloopJonB
Re: Volvo MD 2B

Quote:
Originally Posted by R.Jones View Post
Just another note... I found that if you look you can use auto starters for many of those early Volvos as we did since they are diesel.
Do you mean automobile starters or something else? That weird dynastart left me knowing less than I thought I did about the world of starters.
01-29-2013 01:39 PM
R.Jones
Re: Volvo MD 2B

Just another note... I found that if you look you can use auto starters for many of those early Volvos as we did since they are diesel.
01-29-2013 01:36 PM
R.Jones
Re: Volvo MD 2B

we sail a 42 foot Friendship sloop out of Booth Bay Harbor Maine. We sail more than motor as we are the last sailing lobster boat in Maine. We are installing a Electric Yacht 360 system that provides 30 hp on the shaft by using two motors. If one quits we still have another, great back up. We carry 8 6 volt AGM batterries. This system has been out for a while and a proven winner in the electric drive market. Check out Electric Yacht and see what they come up with for your boat. Think out side the box
01-29-2013 01:26 PM
SloopJonB
Re: Volvo MD 2B

Quote:
Originally Posted by R.Jones View Post
We took care of our Volvo 2000 by shooting it. Replaced it with a Electric Yacht 360 system at half the cost of a new diesel engine
Did you use a Desert Eagle .50?

How's the electric for cruising? Is it good for more than getting in & out of the harbour?
01-29-2013 12:29 PM
R.Jones
Re: Volvo MD 2B

We took care of our Volvo 2000 by shooting it. Replaced it with a Electric Yacht 360 system at half the cost of a new diesel engine
01-28-2013 09:06 PM
simpsoned
Re: Volvo MD 2B

Agree with the "proceed with caution" to a point...get to the bottom of why the head gasket blew in the first place, then evaluate. I have an MD7B that is almost 35 years old and it is rock solid...but I take care of it annually and pay attention to all the little noises, etc. when I can hear them over the normal engine noise. Yes, it can vibrate quite a bit (especially if the mounts mounts are worn) and yes, it is underpowered...but they are like the " ole Johnny two poppers" on tractors that are still running from the 1940's when they were manufactured. You have to go along way to kill it. As far as the alternator/starter...they don't make them from Volvo anymore, but the secondary market has them for a reasonable price (compared to West Marine)...so hit the "Google" as W put it and you can pick up a replacement if necessary.
01-23-2013 02:09 PM
SloopJonB
Re: Volvo MD 2B

Quote:
Originally Posted by Rockter View Post
My friend, be very careful.

If it "just" needed the head gasket, then why has he not done it? How can he be sure it's a head gasket and not the cylinder base O-rings?

I have the Volvo MD17C, the later 3-cylinder version.

On the picture you include, I notice what appears to be a stainless steel (?) exhaust manifold. That caught me off-guard as it is not an original equipment item.

If you have coolant in the oil, then the cooling system has breached. That happened to me, and it turned out to be the cylinder base O-rings on one of the cylinders. We had to pressure test all three barrels to find it, which meant having to take all three off.

Volvo want about $75 for the O-ring kit for a single liner.

Remember that you will also need a gasket set for the exhaust manifold. They are expensive.

Make sure you budget for all these items.

At the outside, you need to be thinking of about perhaps $200 for gaskets and you have to be sure you have found the leak.

If and when you take the cylinder heads off, look at the coolant levels you see there. If one (or both) of them is not at the top of the liner, then you have a cylinder base leak.

Personally, I would not touch it. I have been caught, and caught badly, by hearing (and trusting) that something "just" needs done.

The last lesson for that (not with an engine), cost me 72 days to fix.
.
Thanks - I AM being extra careful for the reasons you state. He hasn't fixed it because he isn't capable of doing it himself and he's too broke to pay someone.

I'm still "thinkin' about it" That's why I mentioned spending a few bucks to have the pro's look at it/fix it. I don't need to pay for a survey of the boat so spending some money on the engine instead might be worth it.

"proceed with caution" are my watch words in this case.

P.S. Even if it needed a new engine it wouldn't be a bad buy but I don't want to get in that deep anymore.
01-23-2013 07:25 AM
Rockter
Re: Volvo MD 2B

My friend, be very careful.

If it "just" needed the head gasket, then why has he not done it? How can he be sure it's a head gasket and not the cylinder base O-rings?

I have the Volvo MD17C, the later 3-cylinder version.

On the picture you include, I notice what appears to be a stainless steel (?) exhaust manifold. That caught me off-guard as it is not an original equipment item.

If you have coolant in the oil, then the cooling system has breached. That happened to me, and it turned out to be the cylinder base O-rings on one of the cylinders. We had to pressure test all three barrels to find it, which meant having to take all three off.

Volvo want about $75 for the O-ring kit for a single liner.

Remember that you will also need a gasket set for the exhaust manifold. They are expensive.

Make sure you budget for all these items.

At the outside, you need to be thinking of about perhaps $200 for gaskets and you have to be sure you have found the leak.

If and when you take the cylinder heads off, look at the coolant levels you see there. If one (or both) of them is not at the top of the liner, then you have a cylinder base leak.

Personally, I would not touch it. I have been caught, and caught badly, by hearing (and trusting) that something "just" needs done.

The last lesson for that (not with an engine), cost me 72 days to fix.
.
01-13-2013 08:00 PM
SloopJonB
Re: Volvo MD 2B

Quote:
Originally Posted by klem View Post
The flywheel definitely helps with vibrations but it is still pretty noticeable.

If the headgasket is bad, there may be other problems related to that. Depending on how it blows, you get mixing of many different things. In a worst case, you could have coolant in your cylinder which could cause rust and potentially require major work. Also, you often end up with coolant in your oil which can be bad if it goes unnoticed.

And then there is the question of why the head gasket blew. It is possible that it deteriorated with age and cycles but that is a pretty uncommon problem as far as I know on these engines. It is likely that the gasket was weakened or the cylinder pressure got too high. The gasket could be weakened if the engine was running really hot. To get really high cylinder pressure on a naturally aspirated engine, you need a problem like improper timing or injection problems.

If it were me, I would want to get to the bottom of the head gasket issue and try to establish why it happened.
That's exactly why I asked and am being extra cautious. There is a bit of coolant in the oil - just enough to cloud it slightly, not a milkshake. I was concerned about a possible cracked casting or suchlike so I talked all this over with the tech at the Volvo shop and he said he doubted it was anything more than the gasket. His biggest concern seemed to be maintaining the integrity of the lower cylinder seal when removing the head.

Even if I had to buy a new crate engine the boat would not be overpriced but I just don't want to get in that deep anymore. Cleaning up "scruffy" and tailoring the boat to my tastes is as deep as I want to go, at least for the foreseeable future.
01-13-2013 07:39 PM
klem
Re: Volvo MD 2B

The flywheel definitely helps with vibrations but it is still pretty noticeable.

If the headgasket is bad, there may be other problems related to that. Depending on how it blows, you get mixing of many different things. In a worst case, you could have coolant in your cylinder which could cause rust and potentially require major work. Also, you often end up with coolant in your oil which can be bad if it goes unnoticed.

And then there is the question of why the head gasket blew. It is possible that it deteriorated with age and cycles but that is a pretty uncommon problem as far as I know on these engines. It is likely that the gasket was weakened or the cylinder pressure got too high. The gasket could be weakened if the engine was running really hot. To get really high cylinder pressure on a naturally aspirated engine, you need a problem like improper timing or injection problems.

If it were me, I would want to get to the bottom of the head gasket issue and try to establish why it happened.
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