Anyone have any ideas?

Oonrahnjay · May 08, 2014, 04:50:56 PM

Quote from: Ace on May 06, 2014, 01:11:28 PMI think we got all of the air out of the system! It will not take any more coolant and I've topped it off after several long and short runs, also the very first trip after radiator change we had to stop on side of road and bleed off an air pocket.

Yeah, I supposed that that would be it but the symptoms kinda made it a possibility. As a further thought, it sounds like *something* is blocking the flow so if it's not a bubble, that does point toward rag, doesn't it?

HB of CJ · May 08, 2014, 05:00:30 PM

Bad used radiator. Slipping belts. Not all drive belts are the same. Anyway you could line up and mark on the belts and pulleys to see if the belts are slipping at high rpm? How much slippage is normal? Dunno. Finally sabotage. You already have found a rag where it had no reason being. What else may be inside? Sorry. Just me. HB of CJ (old coot)

Ace · May 08, 2014, 06:54:37 PM

HB the belt is showing absolutely no sign of slippage. I would think that with many miles logged there would be some traces of rubber or shiny ness or something! There's none!
I wouldn't call stuffing the rag in the radiator was sabotage. I just think they should have used a different means of protecting trash from entering during shipping.

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Ace · May 15, 2014, 02:37:40 PM

I spent ALL day yesterday removing the ECM, T-Stats, and water pump.
I found a very very small, I mean it small enough that it wouldn't fill a thimble, amount of rag in one T-Stat.
Back flushed from every opening and then forward flushed the same. Ordered a new fan belt by just giving Prevost parts my vin and the belt came today. It's a Gates A-94. Same as the one I took off. It doesn't fit! It's too big! What gives?
Found a A-92 at the shop and it fits perfect.
This may have been the biggest part about not being able to run 70+ without it running hotter than normal.
As for the A-94 belts? I'm stumped and just don't understand!
Leaving tomorrow so maybe we'll see once I hit the slab!

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eagle19952 · May 15, 2014, 06:19:07 PM

was a pulley changed, with a wrong one ?
the easiest way to check a slipping belt...put a big long wrench on a pulley nut...but you probably already did that.

Ace · May 15, 2014, 06:36:27 PM

It appeared to not be slipping on the crank but it may have been slipping on the fan pulley!
But get this,
Old belt fit and you could not turn the fan by hand but replacing the belt with the same exact number belt, you COULD turn the fan by hand and the air tensioner would not put enough tension on the new belt to tighten it up.
Still confused!

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luvrbus · May 15, 2014, 07:32:32 PM

When I questioned Gates about a loose fitting belts the guy told me with their design it would tighten under load and it did how much it would tighten I have no idea

Ace · May 16, 2014, 07:34:00 AM

After calling Prevost, they NOW tell me there is TWO different numbers for the H3-40 and depending where you vin number falls determines what belt. Some how my bus had the wrong belt on since I owned it! Supposedly!

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luvrbus · May 16, 2014, 07:45:50 AM

I know they use a Dayco belt I have one in the shop Dayco number is 510045 Prevost number is 50663 it's been here a long time if it's what you need I'll ship it to you

Ace · May 16, 2014, 09:32:07 AM

No, thanks anyway I'm good to go now

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Ace · May 16, 2014, 04:02:44 PM

Alrighty! That's the way the bus is supposed to run!

Ran back roads up to 72 mph and temps never went above 177. Can't wait to try the interstate but I'm thinking the problem has been cured once and for all!

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Busn-Gramps · May 17, 2014, 03:17:46 AM

Hi Ace, I think I have found your problem. You said you painted the radiator gloss black. That should not be done. The paint will not let the radiator cool right. The paint on radiators is a special paint. Get rid of the paint and your troubles will be over!

Ace · May 17, 2014, 05:43:00 AM

Busn
Maybe you misses my last post.
The problem has been corrected!
I don't think the paint had anything to do with contributing to the problem/s. If it was, it would STILL be a problem!
You can't ask it to run any cooler than it presently is at the speeds I've been able to run so far.
I'm very happy that it doesn't require any major repair work and I don't have to look any further for a problem!

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Oonrahnjay · May 17, 2014, 03:21:13 PM

Quote from: Ace on May 17, 2014, 05:43:00 AM
I'm very happy that it doesn't require any major repair work and I don't have to look any further for a problem!

Yep!!!

Mex-Busnut · May 18, 2014, 06:09:58 AM