Blowing Oil

Gwillett · 12-03-2006, 05:53 PM

Hope someone can help. I have a 455 in a jet boat which is blowing oil out of the dip stick tube. Any suggestions?

ozoneblue · 12-04-2006, 05:45 AM

Check PCV to make shure its not clogged ,Are you useing a breather type oil cap?

Oldsguy · 12-04-2006, 05:54 AM

What is your oil quantity and what size pan are you using?

Also, try this or other threads at that site. good stuff.
http://72.22.90.30/phpBB2/viewtopic....ht=blowing+oil

Gwillett · 12-04-2006, 06:04 AM

I check the PVC and replace it.It has a 10 qt. oil pan on it.It idles and start
great.but once you throttle down on it,thats when oil comes out of dip stick.
No smoking.

Gwillett · 12-09-2006, 07:26 AM

Would a Blown head gasket cause pressure build up in the lower end.

VegasDelta · 12-09-2006, 10:56 AM

Sounds like you're getting blowby past the rings. Try a compression check to verify. Good luck.

Gwillett · 12-09-2006, 02:13 PM

When I do a compression check what I am I looking for????
Blown head gasket or Broken ring?

VegasDelta · 12-09-2006, 03:01 PM

Remove all the plugs, check compression in all cylinders & write down the results. Low compression in adjacent cylinders usually indicates a blown head gasket. If readings are low overall, add a tspn of motor oil to each cylinder as you re-check the compression. An increase in compression indicates worn rings, no increase indicates worn valves.
A blown head gasket can sometimes cause oil in the radiator or water in the crankcase. Good luck.

12-03-2006, 05:53 PM	#1 (permalink)
Gwillett Junior Member Join Date: Dec 2006 Posts: 5	Blowing Oil Hope someone can help. I have a 455 in a jet boat which is blowing oil out of the dip stick tube. Any suggestions?

12-04-2006, 05:45 AM	#2 (permalink)
ozoneblue Senior Member Join Date: Jun 2006 Posts: 404	455 oil Check PCV to make shure its not clogged ,Are you useing a breather type oil cap?

12-04-2006, 05:54 AM	#3 (permalink)
Oldsguy Administrator Join Date: May 2004 Location: Lees Summit MO Posts: 2,553	What is your oil quantity and what size pan are you using? Also, try this or other threads at that site. good stuff. http://72.22.90.30/phpBB2/viewtopic....ht=blowing+oil __________________ Dan '46 2 door

12-09-2006, 10:56 AM	#6 (permalink)
VegasDelta Member Join Date: Aug 2005 Location: Henderson, Nevada Posts: 34	Sounds like you're getting blowby past the rings. Try a compression check to verify. Good luck. __________________ 1966 Olds Delta 88 Convertible 1939 Buick Century 2004 Dodge Hemi Ram 2002 Kawasaki Vulcan 1500 FI

12-09-2006, 03:01 PM	#8 (permalink)
VegasDelta Member Join Date: Aug 2005 Location: Henderson, Nevada Posts: 34	Remove all the plugs, check compression in all cylinders & write down the results. Low compression in adjacent cylinders usually indicates a blown head gasket. If readings are low overall, add a tspn of motor oil to each cylinder as you re-check the compression. An increase in compression indicates worn rings, no increase indicates worn valves. A blown head gasket can sometimes cause oil in the radiator or water in the crankcase. Good luck. __________________ 1966 Olds Delta 88 Convertible 1939 Buick Century 2004 Dodge Hemi Ram 2002 Kawasaki Vulcan 1500 FI

12-04-2006, 06:04 AM	#4 (permalink)
Gwillett Junior Member Join Date: Dec 2006 Posts: 5	I check the PVC and replace it.It has a 10 qt. oil pan on it.It idles and start great.but once you throttle down on it,thats when oil comes out of dip stick. No smoking.

12-09-2006, 07:26 AM	#5 (permalink)
Gwillett Junior Member Join Date: Dec 2006 Posts: 5	Would a Blown head gasket cause pressure build up in the lower end.

12-09-2006, 02:13 PM	#7 (permalink)
Gwillett Junior Member Join Date: Dec 2006 Posts: 5	When I do a compression check what I am I looking for???? Blown head gasket or Broken ring?

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