| Author |
Message |
    
Brett Thomas
New member
Username: bmac8369
Post Number: 1
Registered: 11-2009
| | Posted on Thursday, November 05, 2009 - 08:36 am: | 
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I am the new owner of a 28' Topaz with twin TAMD41ps. Last night we were on our way out to do some stripper fishing (about 3200rpms) and the starboard engine lost oil pressure and i shut it down. I was watching the gauges and saw it drop so i shut it down. When i opened up the hatch oil was all over the vavle covers and top of the engine. The breather line coming off the valve cover was off. So we checked the oil level and noticed it was low. Added the proper amount and restarted the engine. It fired up like normal and sounded ok. About 10 seconds later the breather line on the vavle cover popped off and oil began coming out of the dipstick tube. So we shut it down and went back to shore on the other engine. My question is what is the cause of this, PCV messed up? ALso what damage was suffered. |
Brett Thomas
New member
Username: bmac8369
Post Number: 2
Registered: 11-2009
| | Posted on Friday, November 06, 2009 - 02:57 pm: |
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Anyone??? |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4343
Registered: 04-2006
| | Posted on Friday, November 06, 2009 - 10:11 pm: |
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I only see 2 possibilities:
1: Blown hole in a piston. but not likely if engine performes.
2: Your crank case ventilation system is blocked. |
Brett Thomas
New member
Username: bmac8369
Post Number: 3
Registered: 11-2009
| | Posted on Monday, November 09, 2009 - 02:45 pm: |
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Mort thanks for the reply. My first thought was plugged crank case vent. I can not find a crank case vent on my TAMD41P. My mech said it doesnt have one. Could this by true? |
Sailor
Member
Username: skiss
Post Number: 33
Registered: 08-2006
| | Posted on Monday, November 09, 2009 - 04:04 pm: |
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Should be the silver can in front of the air cleaner cover. I have the B model which is almost the same config and was talking with the
mechs today and they say the crankcase vent. sys. is a reliable system. Does your engine have this can? It might be mounted on a check valve of sorts. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4348
Registered: 04-2006
| | Posted on Monday, November 09, 2009 - 10:02 pm: |
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I do not think the 'P' model have that filter, I do not find it in thee parts breakdown.
Anyway, all engines have a crank case ventilation system, one way or the other. They just need to get rid of the pressure build up.
Your hose popping off is a clear sign that pressure gets too high.
Follow the hose, where does it attach?
Is it a blockage in the valve cover where it attach to? |
Sailor
Member
Username: skiss
Post Number: 34
Registered: 08-2006
| | Posted on Tuesday, November 10, 2009 - 08:19 am: |
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These are listed for the TAMD41P-A, I think...
Maybe they are options? Maybe Morten can clarify.
49 Crankcase ventilation 838763
50 Check valve 858256
51 Spring pin 95197152
52 Steel ball 181501
53 Gasket 843449
54 Filter 876069 |
Brett Thomas
Member
Username: bmac8369
Post Number: 4
Registered: 11-2009
| | Posted on Tuesday, November 10, 2009 - 08:25 am: |
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thanks guys for the replys. I am just at a loss here. The engines only have 800hrs. I cant believe I am having these problems after my first trip on the boat. Sailor, do you have a schematic showing the #s you listed? Thanks for all the help. |
Brett Thomas
Member
Username: bmac8369
Post Number: 5
Registered: 11-2009
| | Posted on Tuesday, November 10, 2009 - 08:28 am: |
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Nevermind i found it. Do you know if its hidden/under the aftercooler? |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4349
Registered: 04-2006
| | Posted on Tuesday, November 10, 2009 - 08:52 am: |
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Sailor.
I finally found the diagram.
My guess the ball is 'stuck'.
Try follow this link:
http://www.marinepartseurope.com/sv/volvo-penta-sprangskiss-7742700-21-9832.aspx |
Sailor
Member
Username: skiss
Post Number: 35
Registered: 08-2006
| | Posted on Tuesday, November 10, 2009 - 08:53 am: |
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https://www.marinepartseurope.com/en/volvo-penta-explodedview-7742700-21-9832.as px
Morten does have a point, because another view shows qty 3 inspection plates, so maybe it is time to download the needed manuals specific to your serial numbers. The Filter 876069 if installed is attached to the inspection plate under the aftercooler and the filter should be between the air cleaner cover and aftercooler. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4350
Registered: 04-2006
| | Posted on Tuesday, November 10, 2009 - 08:59 am: |
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There are some different 'versions' The 'D' type has 3 equal inspection covers and no filter.
The A, B and C has a different filter and no ball-valve.
Then what is on the pick is P-A?
All a jungle, try to figure out by searching on the engine.
On the (A),B and C types the hose from valve cover (if modified) goes to behind the air filter. |
Brett Thomas
Member
Username: bmac8369
Post Number: 6
Registered: 11-2009
| | Posted on Tuesday, November 10, 2009 - 09:02 am: |
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Mort,
Which part # is the Ball? Thanks so much guys. I am going to the boat tomorrow and get the numbers so i can get a book. |
Brett Thomas
Member
Username: bmac8369
Post Number: 7
Registered: 11-2009
| | Posted on Tuesday, November 10, 2009 - 09:08 am: |
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So in short there is some sort of release, either a filter or a valve correct? |
Sailor
Member
Username: skiss
Post Number: 36
Registered: 08-2006
| | Posted on Tuesday, November 10, 2009 - 09:35 am: |
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I was told the valve is for Solas qualification.
I was told it's purpose is to keep water out. If equipped, it should spin off with a couple of turns and then can be easily checked. This is something a mechanic would not overlook, so I wonder if you have something different. It is also very possible to have the filter without the check valve, which is the way my B is set up. |
