Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 21-01-2018, 00:00   #1
Registered User
 
daletournier's Avatar

Join Date: Jan 2012
Location: Seychelles
Boat: Catalina 470
Posts: 2,806
4JH3te oil cooler

I have the 4JH3TE 75hp turbo. Being the worrier that I am I think about things that can go wrong. The oil coolers on the 4Jh3e series have been mentioned several times over the years.

My engine has just over 1000hrs,it runs awesome but had very little use prior to me purchasing this boat and I wouldn't be surprised if the coolant prior to me changing it last year was the original.

I hate stupid things and yanmar did some stupid things on these engines ie. water pump">Raw water pump and oil cooler placement.

I'm not going to do it now but some stage in the near future I'm going to pull the oil cooler down and have a good look at it. It's in a difficult spot, even the hoses clamps are pain to get to.

My question. Is the oil cooler on the 4jh3-te the same as the 4jh3e?

Second question, is it feasible to use an after market oil cooler and remote mount it, never having to deal with its difficult position again?

Third question. If the answer to above is yes, what aftermarket cooler do people use?

Thanks in advance.
__________________

daletournier is offline   Reply With Quote
Old 21-01-2018, 01:27   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2005
Location: Bellingham
Boat: Outbound 44
Posts: 6,003
Re: 4JH3te oil cooler

The coolant doesn't effect the oil cooler. The oil cooler is raw water cooled.
__________________

__________________
Paul
Paul L is offline   Reply With Quote
Old 21-01-2018, 05:37   #3
Registered User
 
daletournier's Avatar

Join Date: Jan 2012
Location: Seychelles
Boat: Catalina 470
Posts: 2,806
Re: 4JH3te oil cooler

Quote:
Originally Posted by Paul L View Post
The coolant doesn't effect the oil cooler. The oil cooler is raw water cooled.
Hi Paul, yer, realised that after I posted.
daletournier is offline   Reply With Quote
Old 21-01-2018, 15:41   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2005
Location: Bellingham
Boat: Outbound 44
Posts: 6,003
Re: 4JH3te oil cooler

Quote:
Originally Posted by daletournier View Post
Hi Paul, yer, realised that after I posted.
It sure seems like it would have been nicer to cool with coolant and reduce the corrosion on the well hidden oil cooler.
__________________
Paul
Paul L is offline   Reply With Quote
Old 21-01-2018, 15:56   #5
Registered User

Join Date: Jul 2016
Location: East Coast USA
Boat: Catalina 400
Posts: 259
Re: 4JH3te oil cooler

Would 190 degree coolant be adequate to cool the oil? The size and number of passes would have to greatly increase I believe.
kenbo is offline   Reply With Quote
Old 21-01-2018, 16:00   #6
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2005
Location: Bellingham
Boat: Outbound 44
Posts: 6,003
Re: 4JH3te oil cooler

Quote:
Originally Posted by kenbo View Post
Would 190 degree coolant be adequate to cool the oil? The size and number of passes would have to greatly increase I believe.
That's probably the issue. The cooler would have to be much larger, making it way more difficult for the Yanmar engineers to hide it in an inaccessible place.
Oh, and it would cost more.
__________________
Paul
Paul L is offline   Reply With Quote
Old 21-01-2018, 16:12   #7
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 21,973
4JH3te oil cooler

Quote:
Originally Posted by kenbo View Post
Would 190 degree coolant be adequate to cool the oil? The size and number of passes would have to greatly increase I believe.


First I doubt your coolant is 190F, most Marine Diesels run lower than that I believe, but my experience is with older motors, maybe new ones do run that hot?
Then just as a point of reference, every truck, fast cars etc that have oil coolers, cool their oil with 195F coolant, or I have not seen any that didnt.
Often times for big Diesels that idle a lot etc, they are as much oil heaters as coolers, but to answer your question, yes your oil can be cooled with engine coolant, as may of course are.
Automobiles seem to average an oil temp in the low 200s, out little Marine Diesels dont get their oil anywhere near that hot, and I cannot understand why not.
In piston aircraft its generally accepted that in order to cook off moisture that forms acid, your oil temp needs to run a minimum of 180F.
My 4JHEs oil temp seems to be closer to 165 or so, and cooler than Id like to see it, however I dont run it very hard either, usually only 2000 RPM or so.
a64pilot is offline   Reply With Quote
Old 21-01-2018, 16:30   #8
Registered User
 
IslandHopper's Avatar

Join Date: Dec 2009
Posts: 1,401
Re: 4JH3te oil cooler

The newer 4JH4-TE 75hp uses coolant (fresh water) for the oil cooler...
IslandHopper is offline   Reply With Quote
Old 21-01-2018, 16:31   #9
Registered User

Join Date: Jul 2016
Location: East Coast USA
Boat: Catalina 400
Posts: 259
Re: 4JH3te oil cooler

Dale,

The 4JH3E and 4JH3-TE have different oil coolers. The part numbers are 129670-33000 and 129673-33010 respectively.

My point on coolant temp was that the delta T between coolant and sea water was great enough to warrant a larger oil cooler with more passes if you wanted to achieve the same engineered oil temp.

The thermostat on my 4JH3E begins to open at 173F and is fully open at 194F. So 185 for a mildly loaded state would be my estimate
kenbo is offline   Reply With Quote
Old 21-01-2018, 16:48   #10
Registered User

Join Date: Feb 2013
Location: Lago de Izabal, Guatemala
Boat: Seafarer36c
Posts: 4,860
Re: 4JH3te oil cooler

Quote:
Originally Posted by a64pilot View Post
In piston aircraft it’s generally accepted that in order to cook off moisture that forms acid, your oil temp needs to run a minimum of 180F.
My 4JHE’s oil temp seems to be closer to 165 or so, and cooler than I’d like to see it, however I don’t run it very hard either, usually only 2000 RPM or so.
I think they say 235 is the optimum temp for modern oil. Maybe we don't need an oil cooler so much? If I had a failure during passage, I can see by-passing the thing.
Ecos is offline   Reply With Quote
Old 21-01-2018, 16:59   #11
Registered User

Join Date: Jul 2016
Location: East Coast USA
Boat: Catalina 400
Posts: 259
Re: 4JH3te oil cooler

Dale,

I believe the oil coolers on NA and turbo 4JH3's are constructed differently as well. The NA engine like mine have a copper nickel tube construction and from memory your is a casting of some sort, maybe cast iron?

The failure mode may be quite different.
kenbo is offline   Reply With Quote
Old 21-01-2018, 17:16   #12
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 21,973
Re: 4JH3te oil cooler

Quote:
Originally Posted by Ecos View Post
I think they say 235 is the optimum temp for modern oil. Maybe we don't need an oil cooler so much? If I had a failure during passage, I can see by-passing the thing.


If you had the hose to do it. I think I could hacksaw my oil tubes and slide a rubber hose over the ends and clamp them and that would work. Looks like maybe 5/8 heater hose might fit?
A turbo engine obviously dumps way more heat into the oil than an NA engine as turbos run hot, and the center section is oil cooled.
Engines are really oil cooled more than water cooled.
Now think about this for a minute, the cylinder heads are water cooled, but the crankshaft, camshaft and all the metal parts that rub against each other are oil cooled.

My old 4JHE runs seemingly in warm water at 165 F, with its oil temp real close to that. However Im running at I think less than 50% power, and I guess of course the engine has to be designed to have the snot run out of it.
__________________

a64pilot is offline   Reply With Quote
Reply

Tags
oil

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Oil in raw water exhaust - trans oil cooler failed? jwa Engines and Propulsion Systems 24 02-06-2016 17:53
Yanmar 4JH3TE, 75 hp - turbo Matt Y Engines and Propulsion Systems 20 18-03-2014 12:47
Yanmar Engine Mounts 4jh3te Tomtom39 Engines and Propulsion Systems 5 05-08-2013 17:25
Yanmar 4JH3TE Fuel Filter Sensor - Engine Does Not Start VVD Engines and Propulsion Systems 0 20-08-2011 19:10



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:58.


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.