Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 10-22-2013, 05:53 PM   #1
Junior Member
 
Join Date: Oct 2013
Posts: 1
Replacing Gas Engine with Duramax Diesel and Allison Transmission?

I am trying to replace my 454 Gas engine 1987 Itaska sunflyer with a Duramax diesel with Allison Transmision. Is there a Kit for this?
__________________

__________________
Ed Anderson is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 10-28-2013, 04:54 PM   #2
Registered User
 
Join Date: Feb 2013
Posts: 472
Yes! Your custom welder has all the parts

Seriously I doubt it. You'd have to give more details.
__________________

__________________
Fl_Richard is offline   Reply With Quote
Old 10-28-2013, 05:03 PM   #3
Senior Member
 
Join Date: May 2004
Location: MI
Posts: 197
The best kit would be a wrecked vehicle of similar size, you're going to need a lot of major parts from the engine to rear axle, and smaller ones like wire harnesses and computers.
__________________
Argosy is offline   Reply With Quote
Old 10-28-2013, 06:35 PM   #4
Senior Member
 
caissiel's Avatar
 
Join Date: Oct 2011
Posts: 1,312
6.5l diesel is a pertect fit. But still need the whole truck.
There are many Cummings diesel swope kits available. The 5.9l has been put in all kinds of truck.
I believe the duramax is very similar in size to the large block GM but the transmission will be a bit higher. But might just fit properly in a mh.
__________________
Barbara and Laurent, Hartland Big Country 3500RL. 39 ft long and 15500 GVW.
2005 Ford F250 SD, XL F250 4x4, Long Box, 6.0L Diesel, 6 Speed Stick, Hypertech Max Energy for Fuel mileage of 21 MPusG empty, 12.6 MPusG pulling the BC. ScangaugeII for display..
caissiel is offline   Reply With Quote
Old 10-28-2013, 06:43 PM   #5
Senior Member
 
GraySeal65's Avatar
 
Country Coach Owners Club
Join Date: Jun 2013
Posts: 574
Quote:
Originally Posted by Ed Anderson View Post
I am trying to replace my 454 Gas engine 1987 Itaska sunflyer with a Duramax diesel with Allison Transmision. Is there a Kit for this?
Put another 454 in it and trade it for a diesel pusher. If I have learned anything from custom cars it's that when you have modified anything it becomes very unreliable.
__________________
1997 Country Coach Intrigue Horizon 36' (The Dinosaur Burner)
GraySeal65 is offline   Reply With Quote
Old 10-28-2013, 06:47 PM   #6
Senior Member
 
450Donn's Avatar
 
Join Date: Jun 2006
Location: Dallas,OR
Posts: 2,554
There is a fella in TX someplace that converts Suburban 1500's to Duramax/Allison. It is expensive to do right. You definitely will need a donor vehicle of the same year and model as you will have to swap out the computer, fuel tank, fuel lines engine, wiring harness, transmission, TCM,ECM and probably a whole lot more. It can be done, but not by a back yard mechanic. It is far more complicated and expensive than in the old days.
__________________
Don and Lorri
2007 Dodge 3500 dually
Resident Dummy.
450Donn is online now   Reply With Quote
Old 10-28-2013, 10:32 PM   #7
Senior Member
 
FIRE UP's Avatar


 
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 5,277
Quote:
Originally Posted by Ed Anderson View Post
I am trying to replace my 454 Gas engine 1987 Itaska sunflyer with a Duramax diesel with Allison Transmision. Is there a Kit for this?
Ed,
Not sure of your capabilities, experience or tools available including lifts, transmission jacks and a whole lot more but, if you've got any "back yard" mechanics in you, this could be a fun job. Many wouldn't attempt it and would advise against it but, it's still just an engine swap. Yes, a bit more complicated than "yester year" engine swaps (done a few) with a carburetor and the ability to put any transmission you want behind your new engine. It would be nice to acquire the entire donor truck/vehicle so you can get a complete wiring harness, and any all particulars etc.

There are also business's like "Painless" wiring that build complete engine wiring harness's for a zillion applications. Not sure of the weight differences between the two engines but, that may be a consideration too. If the Diesel block which, normally is constructed to seriously stronger standards is that much heavier, something might be needed to compensate in the suspension area too, not sure.

One more thing, in todays world, not sure about your local but, especially in CAL, smog rules have tendency to put the "kibosh" on a lot of potential engine swapping that used to be legit and legal. Anyway, if you've got the drive, a place to do the work, the background for the technical side and, the tools, (more than likely some welding for motor mounts etc. will be necessary) , I'd go for it. Obviously you've taken into account the value of the coach VS the amount of dollars that will be needed to make a complete, running swap. Good luck if you try.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '08 GL 1800 Gold Wing
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)
FIRE UP is online now   Reply With Quote
Old 10-29-2013, 09:45 AM   #8
Senior Member
 
Cat320's Avatar
 
Fleetwood Owners Club
American Coach Owners Club
Join Date: Mar 2011
Posts: 4,754
Quote:
Originally Posted by 92TNTRacing View Post
Put another 454 in it and trade it for a diesel pusher. If I have learned anything from custom cars it's that when you have modified anything it becomes very unreliable.
That's what I'd do. Get rid of the present RV (trade/sell) and buy a DP.
__________________
2014 American Eagle 45T
DD 500
Pulling a Honda CRV
Cat320 is offline   Reply With Quote
Old 10-29-2013, 09:53 AM   #9
Senior Member
 
R2Home's Avatar
 
Join Date: Mar 2012
Location: Palmer Ak
Posts: 1,124
How deep are your pockets? Not only will the items that have already been mentioned need to be changed out, but also the cooling system, exhaust system, fuel system and I am sure that there are many other items.
Unless you are really 'attached' to this unit, replace the gas engine and get a good used MH with a diesel engine.
__________________
2009 38' Diplomat
CSM- retired, wife as co-pilot
Reka & Ali providing security (our 2 labs)
R2Home is offline   Reply With Quote
Old 10-29-2013, 10:03 AM   #10
Member
 
Tony H's Avatar
 
Join Date: May 2000
Location: Monroe WA USA
Posts: 88
Another option would be to put a Chev 502 HT crate engine in. The HT is designed as a high torque engine as opposed to the other high performance 502 crate engines and is essentially a bolt in. The difference towing is like night and day. I've long thought it would make a great motorhome engine.

I replaced the 454 in my '87 3/4T Suburban in 2000. The Suburban was used primarily for towing an 8,000# trailer until we bought a motorhome with a V-10 and we put 40,000 miles on it without a single problem.

PM or email me if you'd like more details about the swap.
__________________
Tony & Margaret Howard
2001 Surf Side 3311 DSO
Monroe WA
Tony H is offline   Reply With Quote
Old 10-29-2013, 11:06 AM   #11
Senior Member
 
1ciderdog's Avatar


 
Join Date: Jun 2010
Posts: 4,325
I kind of doubt that will improve resale value when if you chose to sell it. You must be planning on keeping it a long time. But if you want to do it then go for it.
__________________
Bob, Sandi & Marmaduke the Big Pug
SW OREGON 2004 Journey 39K, 330 Cat
If towing: a 2006 Mini Cooper or 1995 Wrangler
1ciderdog is offline   Reply With Quote
Old 10-29-2013, 03:13 PM   #12
Senior Member
 
akeyzoo's Avatar
 
Join Date: May 2013
Posts: 959
Quote:
Originally Posted by 92TNTRacing View Post
Put another 454 in it and trade it for a diesel pusher. If I have learned anything from custom cars it's that when you have modified anything it becomes very unreliable.

I agree. This IMHO would be like opening pandora's box. Can you fit a large enough radiator/intercooler? Will the tunnel/hood support that larger block and have room for the turbo at the rear? Can you make the right fuel tank fit? Where I live this would not pass emissions as they would expect GAS.

Chris
__________________
------------------------------------
American Revolution 40L CAT C9
Samsung 197, TireMinder, Ready Brute Elite with Wrangler
akeyzoo is offline   Reply With Quote
Old 10-29-2013, 03:26 PM   #13
Senior Member
 
George Schweikle's Avatar
 
Join Date: Apr 2004
Posts: 2,200
6.5 turbodiesel is not a Duramax. That is 6.6 and a completely different engine.

Quote:
Originally Posted by caissiel View Post
6.5l diesel is a pertect fit. But still need the whole truck.
There are many Cummings diesel swope kits available. The 5.9l has been put in all kinds of truck.
I believe the duramax is very similar in size to the large block GM but the transmission will be a bit higher. But might just fit properly in a mh.
__________________
George Schweikle Lexington, KY
1999 Safari TREK 2830, FMCA 190830, Safari International chapter
1995 Safari TREK 2630, 1983 Winnebago Chieftain, 1976 Midas Mini
George Schweikle is offline   Reply With Quote
Old 10-29-2013, 04:50 PM   #14
Moderator Emeritus
 
TXiceman's Avatar


 
Vintage RV Owners Club
Texas Boomers Club
Oklahoma Boomers Club
Ford Super Duty Owner
Join Date: Aug 2000
Location: Full Time, TX Home Base
Posts: 17,150
Blog Entries: 21
Lots of $$$$$$$ and probably not worth the effort unless you really love the RV.

Ken
__________________

__________________
Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot
TXiceman is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gas Versus Diesel ladyrvr66 iRV2.com General Discussion 11 10-26-2013 08:30 PM
Allison shudders when down shifting into 1st Loren Rice Allison Transmission Forum 7 08-30-2013 08:33 AM
Allison Downshift Noise? BCook57 Allison Transmission Forum 3 07-26-2013 06:52 AM
2005 GMC 2500 duramax diesel craig67 Duramax Engine Forum 7 06-23-2013 08:30 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:41 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.