Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 09-04-2013, 08:18   #1
Registered User
 
Sulaire's Avatar

Join Date: Oct 2011
Location: Planet earth
Boat: Hans Christian 41
Posts: 189
Turbo problem on yanmar 4jh2-TE?

I have the above engine on my boat with 2000 hours on it. After cleaning out the exhaust elbow this winter , ( it was quite badly carboned up) I expected less smoke and indeed that seemed to be the case at revs upto around 2200. After that the turbo really kicks in and you can hear the whistling.

On my first trip of the season I tried a few hours at as high revs as I could bear (2900 to 3000) there was a smell of burnt oil or diesel and what looked to be black smoke, but could be blue. The cooling water was coming out with a definite dark stain , almost black in colour and I have the usual black moustash on my transom!! At lower revs the water is clear with only a little smoke.

Question is ; has anyone had a problem with oil seals on these turbos, as I would like it to be that rather than rings /glazing of cylinders.

The engine really does run smooth and starts first time everytime with no glow required and has never given me any problems other than a black moustash that I do not want on my transom. It does use a little oil.

I could paint the transom black and forget about it I suppose!

New injectors, fuel injection removed and checked, compression fine etc etc!

Turbo rebuild experience anyone?

C.
__________________

__________________
Sulaire is offline   Reply With Quote
Old 09-04-2013, 09:13   #2
Registered User

Join Date: Dec 2012
Posts: 24
How much is 'a little oil'? I would first look after the fuel injection.
__________________

__________________
YankeePSC34 is offline   Reply With Quote
Old 09-04-2013, 09:32   #3
Registered User
 
Sulaire's Avatar

Join Date: Oct 2011
Location: Planet earth
Boat: Hans Christian 41
Posts: 189
Hi


Maybe 1 liter every 100 hours?

I did take off the fuel injector and have it bench tested, / serviced it was in good order and everything was firing as it should.

Do you think the blackish water is unburnt fuel?

C.
__________________
Sulaire is offline   Reply With Quote
Old 09-04-2013, 09:52   #4
Registered User

Join Date: Dec 2012
Posts: 24
Yes, that's a little oil. The black smoke is definitely caused by the combustion. Since it seems to be OK w/o the turbo fan, I would check the turbo fan first to make sure the engine gets the combustion air. Also I would check the valves but that is more unlikely because you would notice a significant valve blow also at lower rpm.
__________________
YankeePSC34 is offline   Reply With Quote
Old 09-04-2013, 10:15   #5
Registered User
 
Sulaire's Avatar

Join Date: Oct 2011
Location: Planet earth
Boat: Hans Christian 41
Posts: 189
Hhhmmmm... Interesting as i forgot to mention i do have a good strong blow coming from the rocker cover breather tube, and if i shine a torch at it, i can see a blue tint to the air coming out?
__________________
Sulaire is offline   Reply With Quote
Old 09-04-2013, 12:32   #6
Registered User

Join Date: Dec 2012
Posts: 24
That may indicate worn valve stems. Here you can download a manual.
http://WWW.yanmarmarine.co.UK/PDFs/s...al/EPB5545.PDF
You mentioned that there was significant built up in the mixing elbow. Did you check the turbine wheel for built up?
__________________
YankeePSC34 is offline   Reply With Quote
Old 09-04-2013, 14:04   #7
Registered User
 
Sulaire's Avatar

Join Date: Oct 2011
Location: Planet earth
Boat: Hans Christian 41
Posts: 189
Thanks for that, very helpful.


When i took of the elbow, and looked at the turbo blades they were black with carbon, i did not want to touch them. So left it and did a turbowash proceedure with yanmars own wash 3 or 4 times.

I do not suppose that will have shifted too much carbon, so it is looking like I will need to get a few parts for the turbo and attempt a service.

I am a relative novice, with engine tinkering beyond general servicing, so may pass on the valve stems, infact The turbo service sounds daunting too!!

As I say she runs very well, so i am loath to start fiddling about!

C
__________________
Sulaire is offline   Reply With Quote
Old 09-04-2013, 15:26   #8
Registered User

Join Date: Dec 2008
Location: Oriental, NC
Boat: Mainship Pilot 34
Posts: 1,429
Re: Turbo problem on yanmar 4jh2-TE?

Black smoke at moderate rpms is an indication of too much load- fouled bottom or prop or too much prop or not enough air. I would sudpect too much load. If your boat has gotten heavier over the years with equipment, etc, then the prop may be over pitched. Does it reach rated rpm at wot in gear. If not consider taking a few inches of pitch out of the prop to reduce load.

David
__________________
djmarchand is offline   Reply With Quote
Old 09-04-2013, 16:13   #9
Senior Cruiser
 
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,930
Re: Turbo problem on yanmar 4jh2-TE?

I would suggest that you not try to service your turbo yourself, other than cleaning. They are common turbos and you should be able to find a shop to service them nearby.
__________________
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote
Old 09-04-2013, 21:35   #10
Senior Cruiser
 
bstreep's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: San Antonio, TX/Port Aransas, TX
Boat: 1990 Macintosh 47, "Merlin"
Posts: 2,274
Re: Turbo problem on yanmar 4jh2-TE?

As DeepFrz says, they are common turbos.

I have essentially the same engine, and I've had my turbo off twice in the last 2 years. The job.. sucks. It takes a couple of hours, and tiny hands would help. Those freakin' Yanmar engineers like the package to be pretty, not easy to work on. The tolerance is just absurd...

Anyway, take the turbo off and have it cleaned. Do NOT hit it with high pressure air - it has to be lubricated when spinning. They spin at 70-80,000 rpms - so if they don't spin very freely, they don't work right. The turbo wash is supposed to be used - get this - WEEKLY. Yeah, I laughed too.

A rebuild is somewhat reasonable, a replacement is stupid expensive. They are $250 turbos, and Yanmar charges $1600-2000.
__________________
Bill Streep
San Antonio/Port Aransas, TX
bstreep is offline   Reply With Quote
Old 10-04-2013, 06:40   #11
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2005
Boat: Outbound 44
Posts: 4,575
Re: Turbo problem on yanmar 4jh2-TE?

What is in the turbo wash? Can you make it up yourself?
__________________
Paul L
http://svjeorgia.blogspot.com
Paul L is offline   Reply With Quote
Old 10-04-2013, 09:44   #12
Senior Cruiser
 
bstreep's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: San Antonio, TX/Port Aransas, TX
Boat: 1990 Macintosh 47, "Merlin"
Posts: 2,274
Re: Turbo problem on yanmar 4jh2-TE?

Quote:
Originally Posted by Paul L View Post
What is in the turbo wash? Can you make it up yourself?
I've been tempted, but think that a high dollar engine just isn't worth the risk. You can sometimes buy it on fleabay where someone has bought a big jug, and then broken it up. It SMELLS just like the cleaner "Fantastic". But, I wouldn't do that.

IF you take the turbo off, EZ Off Oven Cleaner (the nasty caustic kind, not the "green" kind) is often touted online as cleaners for these turbos in automobile engines.
__________________
Bill Streep
San Antonio/Port Aransas, TX
bstreep is offline   Reply With Quote
Old 11-04-2013, 07:49   #13
Registered User

Join Date: Dec 2012
Posts: 24
The turbo is manufactured by IHI (ishi kawashima heavy industries) Japan.
__________________
YankeePSC34 is offline   Reply With Quote
Old 22-06-2013, 03:57   #14
Marine Service Provider

Join Date: Feb 2013
Location: SAMOS ISLAND GREECE
Boat: JEANNEAU,BENETAU,BAVARIA etc.
Posts: 148
Re: Turbo problem on yanmar 4jh2-TE?

there is a special circlip in the exhaust turbine side that is also seal.every 4000hrs this needs replacement because it worns and burns oil through your turbo
__________________

__________________
MARINE ENGINNER is offline   Reply With Quote
Reply

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 08:31.


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.