Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 08-04-2012, 11:34   #1
Registered User

Join Date: Jul 2011
Location: Stuart Fl
Boat: Cabo Rico 38
Posts: 692
Checking Oil

I,have a new old boat getting aquainted with.I,am preplexed,when checking the oil when cold after sitting overnight the oil is barley present on the dipstick,I,wipe the stick and reinsert remove the oil shows up to the mark,I,ran a thousand miles repeating this process and it was always the same.I,never added oil in all thoese miles,any ideas,The engine is a Yanmar 4jh3e 56 hp 2002 with appx 3000 hours,no smoke and lots of power.
Thanks Dave
__________________

__________________
casual is offline   Reply With Quote
Old 08-04-2012, 11:41   #2
Registered User
 
Ziggy's Avatar

Join Date: Apr 2008
Location: U.S., Northeast
Boat: Contessa 32
Posts: 1,421
Images: 2
Re: Checking Oil

After you reinsert the dipstick, try waiting 10 min or so before you pull it out again to check the level. The cold oil seems to take its time to flow up the tube around the stick.
__________________

__________________
... He knows the chart is not the sea.
-- Philip Booth, Chart 1203
Ziggy is offline   Reply With Quote
Old 08-04-2012, 12:51   #3
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,042
Re: Checking Oil

When sitting overnight, the oil SHOULD be all the way up the stick, since it was warm and easily flowing before it got cold.

My first thought would be to check with Yanmar on how long the correct dipstick should be--you can never assume the original parts are on an old boat.

Why it would show a higher level after it warmed up...that does seem odd, another question to ask Yanmar unless someone pops up with an answer.

With a "new old boat" you might also want to send out an oil sample for analysis. This will give you a baseline of what is in the oil, whether bearings are taking wear, many interesting things. Once a year for $25, and you'll know what's happening in the engine, long before it becomes a problem.
__________________
hellosailor is offline   Reply With Quote
Old 08-04-2012, 12:57   #4
CF Adviser
Moderator Emeritus
 
Hud3's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: Virginia
Boat: Island Packet 380, now sold
Posts: 8,929
Images: 49
Re: Checking Oil

Dave,

I had the same engine, 2001 model. Had the same experience with the oil not showing on the stick after the engine sat overnight, but showing right at the mark when re-inserted. I never could figure out why, but came to the conclusion that it wasn't a problem.
__________________
Hud
Hud3 is offline   Reply With Quote
Old 08-04-2012, 13:08   #5
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Re: Checking Oil

Don't worry. The Yanmar engines seem to to do this.i can only assume that there is a vacuume that sucks some of the oil out of the dipstick.
__________________
noelex 77 is offline   Reply With Quote
Old 08-04-2012, 15:13   #6
Registered User
 
FraidNot's Avatar

Join Date: Nov 2009
Boat: Oceanis 411
Posts: 239
Re: Checking Oil

My 4JH3E has the same indication.
Not a bother in my view - the reading on the second 'dip' is the correct one.
__________________
FraidNot
FraidNot is offline   Reply With Quote
Old 08-04-2012, 16:16   #7
Registered User

Join Date: Jul 2011
Location: Stuart Fl
Boat: Cabo Rico 38
Posts: 692
Re: Checking Oil

Thanks Guy's I'll chalk it up to ONE of the mysterys of life.Fortunately I,checked it a second time before adding oil.All's well
__________________
casual is offline   Reply With Quote
Old 08-04-2012, 16:16   #8
Registered User
 
Safari38LH's Avatar

Join Date: Dec 2010
Location: Marion, Ma
Boat: Little Harbor 38
Posts: 259
Me too. First reading always negative. Second reading right on. Third reading oil everywhere so basically no reading. I always thought it was something to do with pressure. Maybe when the engine cools from the last use is forms a vacuum in the dip stick tube? I always wondered.
__________________
Safari38LH is offline   Reply With Quote
Old 08-04-2012, 16:30   #9
Registered User
 
Nemo55's Avatar

Join Date: Feb 2012
Location: Punta Banda, Ensenada. and Canada
Boat: 28Ft Piver Encore, Tri-Maran, Anchored in San Diego.
Posts: 728
Send a message via Skype™ to Nemo55
Re: Checking Oil

The fault is at the dipstick tube being too long ,,it needs to expose the dipstick rod to the oil in the pan, instead of the oil in the tube.
What happens is upon cool down you get a partial vacuum within the crankcase,,which draws the oil out of the dipstick tube,,kinda like ending up with an airbubble.
Then when you pull the dipstick you are equalizing the pressure from outside of the oil pan, thereby allowing oil to once again enter the tube.
Easy way to fix this is to pull the tube assembly and nip off about half an inch below the flange..then remount the tube. Problem solved.
Either that or just live with it,,as it really isn't that big of a deal.
__________________
"The Truth Shall set you Free....But First it will Piss You Off"

http://nemo1955.blogspot.ca/
Nemo55 is offline   Reply With Quote
Old 08-04-2012, 17:18   #10
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,150
Re: Checking Oil

As air cools it contracts, which would draw the level in the tube down.

That's my theory at least.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 08-04-2012, 17:25   #11
Registered User
 
WrenchBender's Avatar

Join Date: Feb 2008
Boat: Hunter 240 & 28.5
Posts: 52
This is common in any engine. Any mechanic will tell you to pull the stick, wipe it, reinsert.....pull and read. This is the proper method hot or cold for any engine with an oil reservoir.
__________________
WrenchBender is offline   Reply With Quote
Old 08-04-2012, 18:18   #12
Registered User

Join Date: Nov 2011
Location: Montegut LA.
Boat: Now we need to get her to Louisiana !! she's ours
Posts: 3,421
Re: Checking Oil

WrenchBender +1Absolutey Right
__________________

__________________
Bob and Connie
bobconnie is offline   Reply With Quote
Reply

Tags
oil

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 2GM20 Shoots Oil Out Dipstick Hole Sonosailor Engines and Propulsion Systems 31 01-12-2012 14:06
Volvo MD2040B Oil Loss Kijit Engines and Propulsion Systems 11 22-08-2012 10:50
For Sale: Westerbeke oil cooler brand new gatormcw Classifieds Archive 0 08-04-2012 10:26
which additive to flush oil sump of my old Ford governor? Shanaly Engines and Propulsion Systems 0 08-04-2012 01:47
Prop fouled and milky saildrive oil TopperHarley Propellers & Drive Systems 12 05-04-2012 18:31



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:05.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.