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08-20-2016, 09:07 PM
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#1
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Junior Member
Join Date: Aug 2016
Posts: 5
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93 454 cracked block
My Dad has a 93 with the 454. The block is apparently cracked and needs to be replaced. He wants to stay away from 454, cause he has heard they are prone to cracking. Wondering what you guys have experienced. Could he put some other kind of engine in, such as a Caddy? Trying to do some research for him, and figure best route to go. Thanks for any help you could offer.
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08-20-2016, 09:58 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,311
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I'm not a Chevy guy , so I can't help with swap info ; I'll just chime in with this ; any kind of swap from Chevy to another brand of motor will kill resale $$, probably not a big deal on a 93 but if you think he'll ever be looking to sell the RV, that swap will rule out a lot of buyers.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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08-20-2016, 10:20 PM
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#3
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Senior Member
Forest River Owners Club Ford Super Duty Owner
Join Date: Aug 2009
Location: Vaughn, WA
Posts: 1,460
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Your dad just experienced some bad luck. The 454 is not prone to cracking, at least no more than any other engine. Switching is not an easy route as they were pretty much all computer controlled and programmed specifically for that engine and sensors. The only change that would be relatively easy ( but not cheap) would be to buy a Chevy 8.1 engine, which is just a bigger version of the 454.
__________________
Nick
1995 Coachmen Santara 360MB 36' w/slide.
Ford F53/460 chassis, 2020 Chev Equinox "toad"
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08-20-2016, 10:22 PM
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#4
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Senior Member
Join Date: May 2014
Posts: 1,368
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Consider first, why did the block crack, allowing it to freeze?
The 454 block is not a problematic block.
It's one of the best blocks you can have for use in a motor home.
I would replace it with a create engine and know you'll have an engine that will out last the coach.
The other alternative would be to find one in a salvage lot, and have it freshened up.
Changing this engine out for another brand just because of unfounded rumors will be a headache, since not only the engine has to be changed, but also the transmission due to the mounting pattern.
Then also consider the drive shaft matting and length to match up with that transmission.
Don't shoot yourself in the foot on this one, keep it chevy, you won't be disappointed.
PS: If you don't like the big block, you can go small block, but the difference in torque (lower) will not empress you.
DTW
__________________
Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP
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08-21-2016, 05:23 AM
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#5
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Senior Member
Vintage RV Owners Club Fleetwood Owners Club
Join Date: Mar 2013
Location: c above
Posts: 5,525
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1982 PA with the 454 no problems 56,000 miles. I also would go with a crate engine if he plans on keeping it.
JMO<
Tim
__________________
1982 Pace Arrow P30 454
KarKaddy SS, Toad: 2009 Genesis
Tim, Joe and Lilly too. Mpls Minn.
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08-21-2016, 05:50 AM
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#6
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Senior Member
Join Date: Feb 2014
Location: Bamber Lake
Posts: 500
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I got a salvage Winnebago with the motor parts all over the floor inside the coach. Since I had no idea what happened to it I called my Chevy parts guy and without blinking he said reman. The thing matched up perfectly and had a great warranty. And we lived happley ever after, sold it and the new owner took it to Texas from NJ.
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08-21-2016, 06:26 AM
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#7
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Senior Member
Tiffin Owners Club
Join Date: Oct 2011
Location: The Ozarks
Posts: 1,566
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The Chevy big block is no more prone to cracking then any other brand. I have run CBB in truck pulls with no block failures ever. However, the DS stock exhaust manifold is known to crack from high temp. The fix is to relief cut web between port runners. Or as I do run LT headers. If you can build a stock BB, stay away from 8.1 crate motor. Ain't worth the money.
__________________
Ret. Military/Corporate Pilot
Summers in the Ozarks-Winters in the Keys
Allegro Bus 36QSP
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08-21-2016, 07:21 AM
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#8
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Junior Member
Join Date: Aug 2016
Posts: 5
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Thanks guys. This is pretty much what I expected to hear. I love BBC myself.
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