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Old 07-21-2010, 05:15 AM   #1
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tiverton , Rhode Island
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Jasper Engines

I'll looking at a Airstream with a rebuilt Jasper 454 Chevy engine. Anyone have any information on the Jasper replacement engines ?

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Old 07-21-2010, 05:35 AM   #2
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1965 26' Overlander
1962 24' Tradewind
Vincennes , Indiana
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I have put 2 Jaspers in my own vehicles over the years, didn't have any trouble with them.


TV1: Black Sheep, 2001 Dodge 3500, 800,xxx miles, a few non-stock parts here and there...
TV2: Brownie, 1989 Dodge W250, only 256,000 miles!
TV3: 2004.5 Dodge 3500, 415,000 miles, 6 spd
TV4: 2005 Dodge 3500, 478,000 miles, 4spd auto
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Old 07-21-2010, 07:56 AM   #3
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1992 34' Excella
Austin , Texas
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Jasper Engine

I put a small block in a Dodge pickup. The engine operated fine for many years/miles and the only build problem that I ran in to was that the casting plugs in the block were made of steel which corroded out and had to be replaced within the first year.
"If you come to a fork in the road, take it."
Austin, TX "Rancho Deluxe"
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Old 07-21-2010, 09:19 AM   #4
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1994 30' Excella
alexandria , Kentucky
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Casting plugs?
Do you mean the freeze plugs?
These should be knocked out when the old engine is put in a tank of caustic liquid when it is cleaned up prior to the rebuild. These are typically replaced with a quality rebuild. I'm would be surprised Jasper would let this one slip by. Typically Jasper is an expensive engine to purchase because they have a good warranty and good reputation.
Steve, Christy, Anna and Scout (Border Collie)

1994 30'11" Excella - rear twin
2009 Dodge 2500, 6 Speed Auto, CTD, Quad Cab, Short Bed
Hensley with adjustable stinger

WBCCI # 3072
AIR # 6035
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Old 07-21-2010, 11:01 AM   #5
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1992 34' Excella
Austin , Texas
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The holes in the block are there for casting purposes and the plugs which are inserted to close them are casting plugs. "Freeze plugs" is a misunderstanding of their purpose. If steel plugs are not coated in some way (such as the factory units are) they will corrode due to chemical reactions in the heated coolant in contact with dissimilar metals in the cooling system. Antifreezes have anticorrosion additives in them to fight this effect, as did my motor which still had the plugs corrode through in less than a year.
"If you come to a fork in the road, take it."
Austin, TX "Rancho Deluxe"
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Old 07-22-2010, 02:29 PM   #6
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1977 28' Argosy 28
Bullhead City , Arizona
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Have not had personal experience with Jasper engines but did some research on them for my MH a couple of people on the forums have put them in their mh's and were pleased with them. Talk to the company over the phone very nice and professional answered all my questions .As far as I can tell they are a good engine ,company.
Gypsy Jo
1977 Argosy 28' Motor Home
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Old 07-22-2010, 09:28 PM   #7
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1984 34.5' Airstream 345
Foothill Ranch , California
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Mine has a Jasper in it and it pulls hard and feels strong!

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