Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 23-12-2017, 07:51   #1
Registered User

Join Date: Mar 2017
Location: UK
Boat: Jeanneau 49DS
Posts: 69
Yanmar 4JH3-TE oil blow by turbo

My Jeanneau has a 4JH3-TE which is turbo charged. There is a small amount of oil left in the tray under the engine after a number of hours of use. "Small" is hard to define as oil is a bit like blood. A little looks like a disaster. So probably less than half a cup.

The engineer who looks after the engine says that it is coming from the turbo and out of the air filter. There is indeed oil on that. And which would be consistent with there being oil on the gearbox casing at the rear of the engine. More to the point, he says that they all do it.

Is that right? Observations would be welcome.

I should say that I am not over concerned as the amount of oil to top up after several days of running (the Med really does either do dead calm or gale) is invariably from half way up the min/max on the dipstick to the max. It is just a pain having to swab the tray under the engine as it is so hard to get to. Even with the companionway steps removed.

Not as big a pain as changing in the impeller. Which the sadists at Yanmar, who put it backwards facing, combined with the sadists at Jeanneau who left minimal access.
__________________

__________________
Alita49DS is offline   Reply With Quote
Old 23-12-2017, 08:03   #2
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 17,560
Re: Yanmar 4JH3-TE oil blow by turbo

If itís not blow by from the engine, if it really is coming from the turbo, in my opinion the turbo ought to be removed and overhauled.
If there is significant time on the engine and you donít know when or if the turbo has been overhauled, then again in my opinion it ought to come out and be overhauled.
I believe a cleaning / overhaul if done in a timely manner is a whole lot less expensive than a new turbo.
Plus to be honest one half of a turbo gets hot, real hot and maybe hot enough to ignite an oil leak. I donít want to sound alarmist, but it may be a possibility.
__________________

__________________
a64pilot is offline   Reply With Quote
Old 23-12-2017, 08:05   #3
Registered User
 
daletournier's Avatar

Join Date: Jan 2012
Location: Seychelles
Boat: Catalina 470
Posts: 2,133
Re: Yanmar 4JH3-TE oil blow by turbo

Quote:
Originally Posted by Alita49DS View Post
My Jeanneau has a 4JH3-TE which is turbo charged. There is a small amount of oil left in the tray under the engine after a number of hours of use. "Small" is hard to define as oil is a bit like blood. A little looks like a disaster. So probably less than half a cup.

The engineer who looks after the engine says that it is coming from the turbo and out of the air filter. There is indeed oil on that. And which would be consistent with there being oil on the gearbox casing at the rear of the engine. More to the point, he says that they all do it.

Is that right? Observations would be welcome.

I should say that I am not over concerned as the amount of oil to top up after several days of running (the Med really does either do dead calm or gale) is invariably from half way up the min/max on the dipstick to the max. It is just a pain having to swab the tray under the engine as it is so hard to get to. Even with the companionway steps removed.

Not as big a pain as changing in the impeller. Which the sadists at Yanmar, who put it backwards facing, combined with the sadists at Jeanneau who left minimal access.
Mine doesn't. I also share your impeller pain, which Catalina compounded.
__________________
daletournier is online now   Reply With Quote
Old 30-12-2017, 18:08   #4
Registered User
 
NoTies's Avatar

Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
Posts: 1,384
Images: 2
Re: Yanmar 4JH3-TE oil blow by turbo

Most Yanmar turbo series have the crankcase breather terminating beside the foam air cleaner. Oil vapour condenses out and what doesn't get sucked into the engine when running soaks the foam. If yours is the same just run a hose from the breather pipe into a can.
__________________
Pete

Positively, socially deviant.
NoTies is offline   Reply With Quote
Reply

Tags
oil, yanmar

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 4JH3-TE engine with KM4A clutch use original oil? Izikalvo Engines and Propulsion Systems 12 29-07-2017 13:09
Yanmar 4JH3-TE oil filter BareProductions Engines and Propulsion Systems 2 25-03-2016 18:32
how to remove turbo oil pipe yanmar JH2 HueyHuey Engines and Propulsion Systems 1 07-08-2012 12:20
To Turbo or Not to Turbo? Intentional Drifter Engines and Propulsion Systems 14 16-09-2007 22:59



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 03:00.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.