Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-23-2020, 09:39 PM   #1
Veteran Member
 
City: Lagrange
Country: United States
Join Date: Sep 2019
Posts: 28
Grand Banks 42 with Cat 3208 435 HP ?

I am now into my second year of searching for a Grand Banks 42 (or maybe a even a 46) I'm going to look at a 42CL with rebuilt 3208's (435HP). I have read the 375HP version is a better choice and that the 435 version doesn't last as long. Maybe this is due to running boats/engines too hard? These rebuilt engines have slightly more than 300 hours. My hope is that maybe if they are run conservatively in a trawler then they will last? Do you have CAT 3208's with the higher 435HP? If so how are they lasting?
Thanks again.
__________________
Advertisement

Pat T is offline   Reply With Quote
Old 09-23-2020, 10:00 PM   #2
TF Site Team
 
Baker's Avatar
 
City: League City, Tx
Country: Texas
Vessel Name: Floatsome & Jetsome
Vessel Model: Meridian 411
Join Date: Oct 2007
Posts: 6,888
I will say the 3208 is a good engine. They are not sleeved so I do think you need to pracitice due diligence on how they were "rebuilt". You are correct...running them easily will help them last longer. If it is truly a decent rebuild, AND you run them easily, they should last longer than you do!!!
__________________

__________________
Prairie 29...Perkins 4236...Sold
Mainship Pilot 30...Yanmar 4LHA-STP...Sold
Carver 356...T-Cummins 330B...Sold
Meridian 411...T-Cummins 450C
Baker is offline   Reply With Quote
Old 09-23-2020, 10:01 PM   #3
Guru
 
tiltrider1's Avatar
 
City: Seattle
Country: USA
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 2,077
There is nothing defective about the 435p 3208. If you run it around 100 to 150 hp it will live a very long time. If you run it above 375 hp it will have a much shorter life.
tiltrider1 is online now   Reply With Quote
Old 09-23-2020, 10:30 PM   #4
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 9,409
+1 on the above responses. But the problem is determining how the engines were run, hard and put away wet or easy and long lived. But if it was truly rebuilt 300 hours ago there hasn’t been much time to run it very hard. Or if the rebuild was a good one. A non sleeved engine need to come out of the boat to have been rebuilt. I would ask to see the receipts for the work and see if there are charges for removal and reinstall.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is online now   Reply With Quote
Old 09-24-2020, 04:50 PM   #5
Veteran Member
 
City: Lagrange
Country: United States
Join Date: Sep 2019
Posts: 28
Thanks . I have hope for these engines. Supposedly they were swapped out engines, so originals were not rebuilt and installed back in. Yes, I had inquired about receipts and who did the rebuilding so I will see when I get there but again supposedly done in FL where I assume there are some good mechanical folks.
I once read about a GB42 repower and they said they had to remove the rear window frame in the main cabin in order to get the engines in and out so I'll be looking for some evidence of that type of work.
And then there is the rest of the boat to be concerned about once I am ok with the engines. I hope I can find surveyors this late in the season (that is in the Northeast).
Pat T is offline   Reply With Quote
Old 09-24-2020, 05:07 PM   #6
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 9,409
Yes, a V8 isnít going to go out a door since it is so wide. An inline 6 can usually be stripped down and go through a door. Good idea to look at the windows for signs of removal. Good luck, hope it works out for you.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you arenít one, there is no explanation possible.
Comodave is online now   Reply With Quote
Old 09-24-2020, 05:32 PM   #7
Veteran Member
 
stiggy's Avatar
 
City: Seattle
Country: USA
Vessel Name: Bailey
Vessel Model: 46' Grand Banks Motor Yacht
Join Date: Apr 2019
Posts: 40
Quote:
Originally Posted by tiltrider1 View Post
There is nothing defective about the 435p 3208. If you run it around 100 to 150 hp it will live a very long time. If you run it above 375 hp it will have a much shorter life.
Hereís my dilemma and I usually get 5 different answers: whatís the long term effects of running these at a lower RPM as far as carbon build up, etc. We have the 435s in a GB 46MY. I usually run them around 1400 RPM. Should we run them up to 2000+ routinely?
stiggy is online now   Reply With Quote
Old 09-24-2020, 06:08 PM   #8
Guru
 
City: Boston
Country: US
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,001
Quote:
Originally Posted by stiggy View Post
Hereís my dilemma and I usually get 5 different answers: whatís the long term effects of running these at a lower RPM as far as carbon build up, etc. We have the 435s in a GB 46MY. I usually run them around 1400 RPM. Should we run them up to 2000+ routinely?
Answer No. 6: Should be run at WOT, 2800 rpm, periodically.
SoWhat is online now   Reply With Quote
Old 09-24-2020, 11:24 PM   #9
Guru
 
tiltrider1's Avatar
 
City: Seattle
Country: USA
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 2,077
CAT says to run the engines between 1500 and 2800 rpms. If you run at 1500 there is no need to heat them up. If you run them at 1400 then you should run them up to 2200 for awhile to properly heat them at the end of each day.
tiltrider1 is online now   Reply With Quote
Old 09-25-2020, 03:32 AM   #10
Veteran Member
 
stiggy's Avatar
 
City: Seattle
Country: USA
Vessel Name: Bailey
Vessel Model: 46' Grand Banks Motor Yacht
Join Date: Apr 2019
Posts: 40
Quote:
Originally Posted by tiltrider1 View Post
CAT says to run the engines between 1500 and 2800 rpms. If you run at 1500 there is no need to heat them up. If you run them at 1400 then you should run them up to 2200 for awhile to properly heat them at the end of each day.
Thanks for that. Is it written anywhere by chance? Any other recommendations Iíll take whatever you got.
stiggy is online now   Reply With Quote
Old 09-25-2020, 06:03 AM   #11
Veteran Member
 
Kapn's Avatar
 
City: Annapolis
Country: US
Join Date: Sep 2019
Posts: 35
Not the same

My understanding of the 3208 lineup is that the larger horsepower engines got more than just big turbos slapped on them. There was piston rings and cylinder head redesign. I donít have proof of this, simply what Iíve heard mechanics say, but Iím sure itís out there if someone were to spend time researching it.
Iíve spent a lot of time running around on boats with 3208 engines. Clearly more modern engines are better, but these things are everywhere. As long as they get heated up occasionally I think you will be fine. After poking along in the ICW through no wake zones and bridges they usually start to get smokey. Then running offshore at 1500+rpm they clear up. Havenít seen a mechanic once come out of an engine room and blame an owner for running lightly. Itís true that itís not good, but I havenít seen an engine failure due to that one reason alone. Maybe a combination of reasons will ultimately fail an engine, but simply running light doesnít seem to do it.
Kapn is offline   Reply With Quote
Old 09-25-2020, 11:07 AM   #12
Guru
 
tiltrider1's Avatar
 
City: Seattle
Country: USA
Vessel Name: AZZURRA
Vessel Model: Ocean Alexander 54
Join Date: Aug 2017
Posts: 2,077
Quote:
Originally Posted by stiggy View Post
Thanks for that. Is it written anywhere by chance? Any other recommendations Iíll take whatever you got.
Itís in the CAT Operation Manual. You can buy the manual from CAT. You can find the manual on line for a fee. I donít think you can find a free source for the manual.
tiltrider1 is online now   Reply With Quote
Old 09-25-2020, 11:58 AM   #13
Guru
 
Cigatoo's Avatar
 
City: Narragansett Bay
Country: New England
Vessel Model: Grand Banks 36
Join Date: Sep 2016
Posts: 1,020
If you are serious about the boat get paperwork that defines exactly what took place with the “rebuild”. If you are lucky it was an authorized Cat dealer. 2nd, call a local Cat dealer and have them survey the engine (s). While everyone here is trying to help you you will get what you are paying for. A certified Cat tech is your best source of info.
__________________

__________________
Charlie0
Cigatoo is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 08:13 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×