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10 Year PM
Hey Guys,
Just got the bus back from a major 10 year PM. Got all new airbags, new Koni, shocks, new bushings, new toll window motor and much more.
Next week off to American Fleet to get the valves checked. Given they have to pull the engine to do this I am thinking about have them replace all the coolant hoses except for the one that blew last year. I think the others are all original.
Anything else I should consider having done while the engine is out?
Bill
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6 Replies
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You should not have to have the engine pulled. I believe you have sufficient height above it to remove the valve cover to do the adjustments.
When coolant is replaced, flush the system and go with extended life coolant, but make sure all the hoses, including the converter installed are like new or replaced.
If you have any leaks even minor ones try to get them resolved.
Not related to the engine would be to change brake chambers, flexible brake air lines and replace push in fittings with compression. Roll the wheels with the wheels off the ground and listen very carefully for noise in the sealed steer and tag hubs. Check but don’t replace any hub seals on the drive axle unless they are leaking.
Take a very hard look at the CAC for leaks, and check the hot and cold hoses in the turbo system for condition. With EGR you are at the limit on the high side and if one fails you can barely move the coach.
I’d suggest you have them program the EGR to kick on at 3200 RPM, and off at 3400 RPM, and if they do to plug the line somewhere between the EGR heat exchanger and the intake manifold. (they won’t do it, it is illegal, but you can try)
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Jon,
After reviewing pictures, Americian Fleet feels they need to pull the engine. They will confirm next week but I am going in with the understanding that is the deal and it’s a 2-3 process.
I just had the coolant changed to extended when I blew the lower hose last year. They Indicated they have special containers and would just return my existing fluids when they put it all back.
CAC was done two years ago and break chambers are on my schedule for next year.
Is what you describe on the EGR the “ugly” fix or is that something different??
Bill
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The Ugly Fix does it depending on if the DDEC is programmed to be disabled above a certain altitude. My coach was not so the ugly fix did not work on mine.
If it works on yours it is a cheap way to eliminate the EGR. You will have to plug the exhaust path to the intake, and on mine the benefit was about 1/2 MPG. That is a nice savings, but the best advantage is I believe it prevents damage to the #6 cylinder that others claim is adversely affected by EGR.
Still check the CAC and the hoses. It is a simple inspection and if you find all is OK it gives peace of mind, if you find a problem you can get it fixed before you can become disabled.
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Bus is at American Fleet today. Engine had to come out not enough clearance to get Jake Bolts out to get to the cuts…
Here are a few pixs if this works…
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Did it take long for the tech to get the engine out? I presume they disconnect the driveshart at the back (front?) of the transmission and pull the engine and trans back as one unit.
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Back From Springfield and American Fleet.
Ended up taking about 2 days to do the full tune up. I didn’t stick around for the full time but they got after it and the Engine was slid out and the overhead part happening by lunch on the first day from what I recall.
Since that had it out and coolant drained I had them replace all the hoses as well.
They found some issues with the exhaust bellows it had been installed incorrectly at the factory and was backwards which caused suit to back up and blow out the pipe. So they replaced that as well
Very impressed with the crew at American Fleet. They clearly know what they are doing!
So knock on wood my 10 year PM is officially done…. now I need to get this girl out on the road
Bill
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