| Author |
Message |
Pat Bartlett (Muddog16)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 17, 2005 - 9:39 pm: | |
I keep reading about a new style slide in engine cradle, I have a 82 Prevost LeMirage, I am going to swap engines, the old engine is a 8v71, the new engine is a 8v92TA. I would appreciate any photos, drawings, or location where I might locate this information! As always thanks for the great input!
Pat
http://prevostlemirage.blogspot.com/ |
Ron Walker (Prevost82)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 3:26 pm: | |
Hi Pat, I put a 8V92 in my 82 Prevo. Took 4 hrs to unhook everything and get the 71 out. And a couple of hours to take all the fitting ect. off the 71 and put them in the same location on the 92. Then 4 hrs to hook everything backup. Engine cradles are a MCI thing I think. If you have any questions about the problems I had email offline.
Ron |
Jim Shepherd (Rv_safetyman)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 3:36 pm: | |
Pat, I am mostly responding to keep this thread active. I want to be clear that I do not know much about Prevost frames, and can only hope someone else jumps in here. I will give you some general thoughts that might help.
When we talk about engine cradles in Eagles and MCIs (and I think Prevosts), we are talking about the general structure that supports the engine “rails”. The engine mounts on Eagles and MCIs set on two long “frame rails” (these rails are not at all like the frame rails in a car or truck) that run parallel to the ground. In the case of the MCIs that I have looked at, the “frame rails” are fabricated such that the form an inverted “V” that the mounts dovetail into. In the case of Eagles and MCIs (and again I think Prevost), the engines are fairly easily removed by removing the back bumper, unhooking all the connections (wires, hoses, mechanical linkages, etc) and then slightly raising the engine off of the “frame rails” and sliding it out the back with a dolly system or a fork lift.
I believe I have read that the 8V92 and the 8V71 are the same general size, so you would probably not have to modify the rails to mount the engine (would probably have to make new mounts and a bunch of other things).
I believe that some Prevosts came from the factory with 8V92 engines, so you might be able to get factory parts to make the conversion.
I have not heard of anyone making up prints for the conversion. Again, there might be factory prints
At best, this is a start to answer your question.
Jim Shepherd
Evergreen, CO
’85 Eagle 10
http://rvsafetysystems.com Toll Free: 1**888**349**0704
Bus Project details: http://www.rvsafetysystems.com/busproject.htm (updated 2/17/05) |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 5:55 pm: | |
The engine cradle for a 8V92 differs from an 8V71. I've got one of each on the ground at my shop. Haven't pulled the 6V92 out of the '80 yet. It will be close but not exact due to the length difference.
The 71 series has a different distiance between the "engine mounts" and the crank centerline from the -92 series |
Dale L. Waller (Happycampersrus)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 6:48 pm: | |
Marc,
I have read you post several times and I'm sure you are mistaken. Did you mean to say the cradle is different for a 6V92 than a 8V71??
Pat,
The 8V92 block and 8V71 blocks have the same outside dimensions. Alot of the external parts interchange so a swap is fairly easy. Just gotta cool all that engine. Be thinking on radiators and cooling.
The major thing for your swap, to mount the engine is make sure you have the CORRECT flywheel housing. The one from the 8v71 won't work!
Unless you plan on doing alot of extra work I wouldn't consider changing the cradle to a "slide in" cradle. Your repower, done correctly will out last the coach.
Dale |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 8:31 pm: | |
Dale,
That's what I was hinting at. Ooooops, forgot, I've got two MCI-9s. I'm sorry if you thought I was talking "Prevosts"
The "mounting height" for the 6V92 and 8V92 is different from the 8V71, in part because the crank dampener is larger in diameter. The length for the 6V92 is shorter than the 8V92. I understand that the accessory package makes a difference also. |
Dale L. Waller (Happycampersrus)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 8:41 pm: | |
Just making sure my brain wasn't going south without me. LOL.
Dale |
Pat Bartlett (Muddog16)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 8:47 pm: | |
Excellant responses, thanks everyone! The 8V71 comes out after New Years. Only thing bothering me is buying the correct parts that I will need, I'm not much interested in doing R$D at this point i just want it to work and not be a major headache!
Ron, as always I appreciate your help and input thanks again I'm sure I'll be asking you some more questions!
Jim, I wasn't sure whether Prevost used the cradle or not, but I thought It was worth checking into also, maybe we will find out more as we go on!
Marc, any chance of taking a few pictures of those cradles?
The engine swap doesn't look that difficult from what I can see, I'm just trying to do a mental walk though......before I get to that point!
Dale, last but not least I'm pretty sure that the bellhousing,flywheel, and torque converter are all different, and I am probably going to need part numbers for each! Plus the drive shaft lenght is different also!
Talking to Prevost Parts always scares my wallet, I love their bus, but their parts prices tend to leave my wallet weighing much less when they are finished!
Thanks again, Pat
http://prevostlemirage.blogspot.com/ |
Dale L. Waller (Happycampersrus)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 18, 2005 - 9:13 pm: | |
You're right I forgot to mention the flywheel. The V92 crankshaft end is larger. I'm not 100% on the torque converter.
A good guy to talk to is Bernie at www.bernhardbus.com I would bet he has alot of the parts you need. He has some good prices too. They do alot of engine swaps for people.
Dale |
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