| Author |
Message |
    
Warren Rankin
New member
Username: warrenr
Post Number: 1
Registered: 03-2009
| | Posted on Sunday, March 01, 2009 - 06:14 pm: | 
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Hi
my 471 marine motor is leaking black oil when under load into the pan. I cant see where its coming from possibly the small breather just above the oil pan - where should I check and why would it leak out of the breather |
david shop
New member
Username: davidshop
Post Number: 2
Registered: 03-2009
| | Posted on Monday, March 16, 2009 - 09:17 am: |
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Warren
What migh happen there it is that you have to much pressure in the engine you need to buy at valve cover that have a breather you can call at 305-545-5588 they be able to help you with that |
MARVIN PIERCE
Advanced Member
Username: marv
Post Number: 282
Registered: 09-2001
| | Posted on Monday, March 16, 2009 - 09:50 pm: |
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how can you tell your getting back oil the pan???? |
Warren Rankin
New member
Username: warrenr
Post Number: 2
Registered: 03-2009
| | Posted on Tuesday, March 17, 2009 - 12:23 am: |
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There is a stainless pan under the motor which we emptied, then after a run with the motor up to 1600 revs for an hour the pan had lots of black oil in it and the motor needed a similar amount
a litre or so
Thanks
Warren |
MARVIN PIERCE
Advanced Member
Username: marv
Post Number: 283
Registered: 09-2001
| | Posted on Tuesday, March 17, 2009 - 03:43 pm: |
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look for 1/4 tube on lower side of engine,comeing out of the block. run engine, should have air blowing out check if lots of oil also comeing out. |
Warren Rankin
New member
Username: warrenr
Post Number: 3
Registered: 03-2009
| | Posted on Tuesday, March 17, 2009 - 04:05 pm: |
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I gather thats the tube pointing downward just above the sump on the left hand side at the back of the motor -looking forward. I think thats the tube leaking oil
will check to see if air is coming out as well
Thanks for your help |
Warren Rankin
Member
Username: warrenr
Post Number: 4
Registered: 03-2009
| | Posted on Saturday, March 21, 2009 - 04:50 pm: |
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the oil is definitely coming out of the air box breather. |
Ronald Tworek
Member
Username: sheriff251
Post Number: 9
Registered: 02-2009
| | Posted on Monday, March 23, 2009 - 09:02 pm: |
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Black carbon oil blowing from the air box drain tube is a sign of worn cylinder kits. It may be time for an inframe overhaul! |
Warren Rankin
Member
Username: warrenr
Post Number: 5
Registered: 03-2009
| | Posted on Thursday, March 26, 2009 - 06:32 pm: |
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Is the air box with the breather a seperate chamber on its own or is it part of the crankcase? |
MARVIN PIERCE
Advanced Member
Username: marv
Post Number: 287
Registered: 09-2001
| | Posted on Monday, March 30, 2009 - 09:33 pm: |
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air box is not part of crankcase system, its part of the blower syetem. |
Warren Rankin
Member
Username: warrenr
Post Number: 6
Registered: 03-2009
| | Posted on Tuesday, March 31, 2009 - 02:02 am: |
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thank you |
Jimmy Graves
Member
Username: jimg4652
Post Number: 23
Registered: 11-2008
| | Posted on Thursday, April 09, 2009 - 09:38 am: |
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Just to add to what Ronald said:
Bad blower seals could also cause oil to blow out of the air box tubes. So if your cylinder kits check out, I'd look at the blower. |
Anthony Havreluk
New member
Username: junior69
Post Number: 1
Registered: 04-2009
| | Posted on Thursday, April 23, 2009 - 08:32 pm: |
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I have a detroit diesel crusher on the engine the air breather is blowing out and muffler is sucking air in so, what could the problem be |
Jimmy Graves
Member
Username: jimg4652
Post Number: 25
Registered: 11-2008
| | Posted on Friday, April 24, 2009 - 11:15 pm: |
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Anthony, have you just replaced your starter? Could have a starter with the wrong rotation, which is turning your engine backwards. |
