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Old 02-21-2018, 08:46 PM   #29
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A lot of wrong information being passed about throw away engines. The C-7 and the older 3126-E engine can be rebuilt. If you do not believe me just look it up in the internet and you will find sleeves that can be installed on the C-7 and the 3126 Cat engines. I have the 3126-E Cat engine on my coach and I have 70K miles on it now and it just broke in at 60K where it runs so smooth that I love the engine. It gets constant 8-9 mpg.
Not sure about the small Cummins engine if you can apply sleeves on it, but I do know that on the 350 hp Cat engines they can install sleeves when ever it needs an overhaul.
When I bought this coach brand new the warranty on the 3126-E was unlimited mileage or five years. Cummins does not give that much warranty and like somebody mentioned they have had their share of problems. The ISL 400 had a problem with wrist pins that were not machined proper and they never recalled the engines back. What they done was install a light on the dash so that it would warn you when it was going to blow up, so that you could have enough time to turn the engine off. And the smaller Cummins engine the ISB had a weak spot on the block and would blow a hole on some of those blocks that were manufactured south of the border. I had that engine on a Dodge truck and I blew two engines before I traded it in. Cummins did make the engines good, but it was disappointing to say the least.

Big engines are installed on big heavy coaches and if you have any mechanical know how, you will understand that the heavier the coach weigh's the more fuel it takes to move that weight.

Have a friend that owns a Wanderlodge Bluebird weigh's over 40K lbs and he told me he only gets five miles per gallon on a two cycle detroit diesel. V configuration, not sure what those engines are called, but it was a V-8 two cycle and I believe the coach was a 1993.
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Old 02-27-2018, 03:05 PM   #30
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Rstoney55

My brother is a mechanic, and he told me to get a CAT. I recently purchase an Itasca Bounder with the CAT 330 HP with 29K miles. I am hoping it will serve me well.
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Old 02-27-2018, 06:28 PM   #31
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You guys saying to baby these things is hysterical. Have you ever seen how a semi is operated by a minimum wage flunky?
I’ve owned several heavy trucks and never had engine problems. Cat’s own literature says a C9 is expected to live 750,000 in a #60,000 dump truck.

A commercial truck is operated foot on the floor between shifts for its entire life and there is nothing you can do to hurt it except lug it or overheat it.

Dan
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Old 02-27-2018, 07:09 PM   #32
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You guys saying to baby these things is hysterical.

Called duty cycle. Most Rvs probably have 10-20percent the load an LongHaul or Emergency vehicle.


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Originally Posted by Rstoney55 View Post
My brother is a mechanic, and he told me to get a CAT.

Keep that bro on speed dial.
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Old 02-27-2018, 09:24 PM   #33
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...you cant out think an Allison trans. On hills, on-ramps, or when passing, leave it alone...

This is BAD advice. The flaw in this position is the Allison can only react to something that has already happened. It cannot anticipate anything.

You CAN anticipate that up coming grade and get the transmission in the right gear to get the engine RPM up on the horsepower peak before you hit the grade. That prevents it from lugging down on the hill in top gear.

These vehicles are NOT cars. You cannot just put them drive and drive down the road, blissfully thinking that the vehicle will do all your thinking for you.
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Old 02-28-2018, 09:20 AM   #34
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This is BAD advice. The flaw in this position is the Allison can only react to something that has already happened. It cannot anticipate anything.

You CAN anticipate that up coming grade and get the transmission in the right gear to get the engine RPM up on the horsepower peak before you hit the grade. That prevents it from lugging down on the hill in top gear.

These vehicles are NOT cars. You cannot just put them drive and drive down the road, blissfully thinking that the vehicle will do all your thinking for you.


I would have to agree with this. I always down shift before a grade to keep the RPM up. And as far as owning a Cat I have a C7 and all I’ve had to do is change the valve cover gasket due to a small leak.
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