Reply
 
Thread Tools Display Modes
 
Old 05-04-2016, 02:35 AM   #1
Senior Member
 
City: Sitka, AK
Country: USA
Vessel Name: Magnetic North
Vessel Model: 1985 Californian 34
Join Date: Dec 2014
Posts: 102
CAT 3208N issues

Hello, I just bought a Californian 34 with twin CAT 3208N engines. During sea trial and survey, there weren't any leaks noticed. The day I took ownership, I found a leak on the port motor that looks like it's coming from the fuel pump or possibly throttle lever. The engine runs great and sounds good, not like it's sucking air. Does anyone have any suggestions on where to start? I like doing stuff myself, but I'm a little nervous to do something I can't undo and be docked til someone can fix it. I've tinkered around a lot but only on gas-powered land vehicles, not diesels or boats. I read that the fuel pump needs timed if taken off, which sounds complicated. Especially with the limited space in the engine room. Any suggestions are welcome and appreciated.

Also...today when I accelerated towards WOT to see how she would do, we got a lot of smoke. During the sea trial, we did the same thing and there wasn't any smoke, and it was something the surveyor and owner both commented on as being a good thing. Is this a concern, and if so, how worried should I be?

The CAT dealer in Juneau has two mechanics here a few weeks that will probably be able to look at it before they leave, but at $150/hr I'd like to limit the hours if I can. And why did this only show up after I bought it!!! (I'm not really looking for answers on that one) Thanks!
__________________
Advertisement

robs523 is offline   Reply With Quote
Old 05-04-2016, 09:14 AM   #2
Senior Member
 
Capt. Jon's Avatar
 
City: Alabama
Country: USA
Vessel Name: Waypoint
Vessel Model: Californian 48' CPMY
Join Date: Dec 2013
Posts: 381
You did not say what is leaking? Fuel, coolant or raw water? I'm guessing since you are saying looks like it's coming from the throttle shaft and mentioned fuel pump then fuel?

If the throttle shaft is leaking fuel you will see pink color in the valley between the heads. If that's the case then the injector pump will have to be removed to access it. Most shops will not put a pump that just needs a repair on their equipment for testing. So most likely they will insist on a rebuild first. Depending on how many hours you have on the engine that would most likely be a good thing.

To remove the injector pump the engine crank shaft has to be rotated to top dead center. There is a place on the front where a pin is inserted to "time" or to be sure the injection pump gears are aligned in the proper position. It then takes a special tool to remove the gear from the pump once the pump Is un-bolted from the engine and all the fuel lines are removed.
__________________

__________________
Jon
------------------------------------------------
Waypoint's are abstract, often having no obvious relationship to any distinctive features of the real world.
Capt. Jon is offline   Reply With Quote
Old 05-04-2016, 09:46 AM   #3
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 3,884
Wipe up the area and find out exactly where the fuel is coming from. If the throttle shaft seal, that housing can be removed from the injection pump without removing the whole pump and disturbing the timing.
Ski in NC is offline   Reply With Quote
Old 05-04-2016, 10:14 AM   #4
Senior Member
 
City: Green Turtle Cay/Western NC
Country: Bahamas/US
Join Date: May 2013
Posts: 109
Agree with Ski in NC. Check the small o ring on the throttle shaft. Also check the clamps that hold the injector lines, sometimes vibration will wear a hole in the line. Great engines!
Tingum is offline   Reply With Quote
Old 05-04-2016, 01:03 PM   #5
Senior Member
 
City: Sitka, AK
Country: USA
Vessel Name: Magnetic North
Vessel Model: 1985 Californian 34
Join Date: Dec 2014
Posts: 102
thanks for the replies.

Yes, Capt Jon, it's fuel. Sorry that wasn't clear.

There is fuel in the valley, but it doesn't look pink, more clearish/yellow like straight diesel. The problem is that I can't tell where it's leaking from. Anything I can see or feel is dry. I have tried a mirror unsuccessfully so far. They have 1600 hours since rebuilt in 2004.

Does the smoke matter? Or are these like diesels on a truck that smoke almost anytime you floor it?
robs523 is offline   Reply With Quote
Old 05-04-2016, 01:20 PM   #6
Senior Member
 
yachtbrokerguy's Avatar


 
City: Fort Lauderdale, FL
Country: USA
Vessel Model: I have keys to lots of boats...
Join Date: Jan 2011
Posts: 469
Marine fuel that does not have a highway tax included has red dye in it. Your fuel may not have red dye.
I use paper towels to search for leaks. Clean up the area as best you can, then wrap paper towels around parts that are suspect. Wrap fuel lines, seals, anywhere that you can get to that might be the leak. Then after running the engine for a few hours the towels might show the source if they are stained with fuel.
__________________
Tucker Fallon CPYB
www.yachtbrokerguy.com
yachtbrokerguy is offline   Reply With Quote
Old 05-04-2016, 01:28 PM   #7
Senior Member
 
Capt. Jon's Avatar
 
City: Alabama
Country: USA
Vessel Name: Waypoint
Vessel Model: Californian 48' CPMY
Join Date: Dec 2013
Posts: 381
They must not Dye diesel fuel in Alaska. Anyway you can lay an oil mat down in the valley and slide it under the pump. Clean the valley first so you start out fresh. This will help you track the leak down. A throttle seal is something that can, and does leak on these engines. Also like tingum said look for leaking around the fuel line nuts. Also rust is a big enemy of these engines. Make sure the lines themselves are not leaking.

As for the black smoke, 3208's can smoke somewhat. However it should not be black heavy smoke. A slight grayish color is the exhaust cloud is ok. If it's black then there could be many other issues. Anything from a dirty bottom or running gear to the fuel system itself. Ski is a great person to ask more in depth questions of.
__________________

__________________
Jon
------------------------------------------------
Waypoint's are abstract, often having no obvious relationship to any distinctive features of the real world.
Capt. Jon is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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





All times are GMT -5. The time now is 03:31 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012