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Old 11-21-2018, 10:07 PM   #21
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1981 28' Airstream 280
Mabank , Texas
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how many miles is rebuild time???

Evening folks,
Been watching these posts with interest. Since my MH is an '81 w\ 94K on the meter I just figured it was time to get a rebuild. Since the 454 isn't a diesel how many miles can the motor handle before a rebuild is considered time? My engine runs good, is strong, pretty easy to start, and drives well, but I'd sure be sorely disappointed if I got out in the middle of bumchuk and it decided to take a nice long sabbatical on me. Assuming I keep the original motor, when is it time to rebuild without being forced to do so?
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Old 11-21-2018, 10:44 PM   #22
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Evening folks,
Been watching these posts with interest. Since my MH is an '81 w\ 94K on the meter I just figured it was time to get a rebuild. Since the 454 isn't a diesel how many miles can the motor handle before a rebuild is considered time? My engine runs good, is strong, pretty easy to start, and drives well, but I'd sure be sorely disappointed if I got out in the middle of bumchuk and it decided to take a nice long sabbatical on me. Assuming I keep the original motor, when is it time to rebuild without being forced to do so?
Probably when oil analysis shows wear metal in the oil, or a compression or leak down test fails. I wouldnít just rebuild to rebuild. Get a mechanic you can trust and throw some money at the the above tests is what I would do.
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Old 11-23-2018, 07:21 PM   #23
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Thatís always been a good question.....if youíve had it a long time and you service it regularly it could go forever....one of the things that is on my bucket list is to rebuild and balance a 460 which I have in the 370LE. I am in the process of installing a highly modified E4OD. Next year I might tackle the 460. I have a 454 in my 325LE and it has about 93,000 on it. I bought it with 88,000 on it and did the compression and leak down tests as well as the timing chain wear test and all were above spec. Regards, Bob
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Old 11-23-2018, 08:12 PM   #24
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1983 31' Airstream310
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It comes down to maintenance, regular use and what weight you're asking the poor little beast to tote around. Your 280 weighs a whole heck ava lot less than a loaded 345 or 350, so your 454 will last longer.
There are people that have 100,000+ miles on theirs, and others that have replaced at 60,000 miles.
If it were me, I'd seriously consider a 12 valve Cummins conversion; but that's just me.

Cheers
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Old 11-24-2018, 06:42 AM   #25
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1982 28' Airstream 280
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Darn, does that mean that at 140796 miles on mine that I'm screwed?


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It comes down to maintenance, regular use and what weight you're asking the poor little beast to tote around. Your 280 weighs a whole heck ava lot less than a loaded 345 or 350, so your 454 will last longer.
There are people that have 100,000+ miles on theirs, and others that have replaced at 60,000 miles.
If it were me, I'd seriously consider a 12 valve Cummins conversion; but that's just me.

Cheers
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Old 11-24-2018, 10:22 AM   #26
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Darn, does that mean that at 140796 miles on mine that I'm screwed?
Not as long as you keep it parked at the farm!
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Old 11-24-2018, 10:35 AM   #27
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Darn, does that mean that at 140796 miles on mine that I'm screwed?
I did say 100,000+, (the plus part was for you Dean). Plus, yours is a shorty as well, which makes my point.

Cheers
Sidekick Tony

PS You gasser guys have it good, (GM crate, Jasper, any parts store for rebuild kits).....try coming up with a replacement Isuzu 6BD1 out on the road. That one couple waited three years before getting their diesel coach back on the road.
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Old 11-24-2018, 12:25 PM   #28
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https://www.npr.org/templates/story/...oryId=18826415
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Old 11-24-2018, 03:05 PM   #29
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Darn, does that mean that at 140796 miles on mine that I'm screwed?
Nope, just means someone has done a good job with the maintenance work
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Old 11-25-2018, 08:04 PM   #30
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1982 28' Airstream 280
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"The RANCH", not the "farm"! LOL



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Not as long as you keep it parked at the farm!
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Old 11-25-2018, 08:20 PM   #31
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1982 28' Airstream 280
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Oh how I wish I had a 31' rear bedroom!


Sometimes I wonder if there is room to stuff my Isuzu turbo diesel and transmission from my tool truck into the motor home. It's not of course, but then I also think about a few months back when the alternator went out on the Isuzu. The alternator alone, no labor to replace, costs a mere $1550. Oh my!



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I did say 100,000+, (the plus part was for you Dean). Plus, yours is a shorty as well, which makes my point.

Cheers
Sidekick Tony

PS You gasser guys have it good, (GM crate, Jasper, any parts store for rebuild kits).....try coming up with a replacement Isuzu 6BD1 out on the road. That one couple waited three years before getting their diesel coach back on the road.
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Old 11-25-2018, 08:25 PM   #32
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1982 28' Airstream 280
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That would have been my dad changing the oil/filter consistently!



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Nope, just means someone has done a good job with the maintenance work
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Old 12-09-2018, 07:36 PM   #33
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1987 34.5' Airstream 345
Menomonee Falls , Wisconsin
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Hey,
When you consider the weight, wind drag, driving habits, etc etc. to compare it to an auto is not fair. A compression test, oil samples, these are a good indicator of its internal condition. If taken care of, and driven sensibly, 150 K is not unreasonable. You can stand on the gas all you want, it's not going up that hill any faster. Carberated motors do wear out an engine quicker. It's turn of the century technology. Get a good fuel injection system. Don't know how much good it'll do you if you got a lot of miles on the unit. One thing that will definetly make it run better. Full length headers, 3 inch dual exhaust into a pair of Walker quiet flow mufflers 3 inch in and out. Put on an edelbrock performer dual plain manifold. Fab some sort of air delivery system. Cold air and a lot of it is good. Try to get air from in front of the radiator. These will help performance and increase life of the engine. If it runs good, and doesn't clatter, or cough, or do. Weird stuff when very hot, I'd drive it and enjoy it. DJ
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