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Old 08-16-2011, 01:28 PM   #1
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Overheating frustration

I am new to owning a motorhome, and if this has been asked I am sorry, I couldnt find a way to search previous posts. I have an 88 Pace arrow with a 454 engine. I have had the radiator and block flushed, head gasket checked ( it was ok) but I still have the issue of overheating. The lower fan shroud is gone. I have been told it shouldn't make that much difference, I don't believe that. And I cant find anything on the net on where to find one, preferably used but it doesn't matter. I want to use this MH and have not been able to because of the overheating. Thank you in advance for the information.
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Old 08-16-2011, 01:51 PM   #2
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Quote:
Originally Posted by fjstevens View Post
I am new to owning a motorhome, and if this has been asked I am sorry, I couldnt find a way to search previous posts. I have an 88 Pace arrow with a 454 engine. I have had the radiator and block flushed, head gasket checked ( it was ok) but I still have the issue of overheating. The lower fan shroud is gone. I have been told it shouldn't make that much difference, I don't believe that. And I cant find anything on the net on where to find one, preferably used but it doesn't matter. I want to use this MH and have not been able to because of the overheating. Thank you in advance for the information.
WELCOME to irv2.com!
There is a "search this forum" button at the top of each one.

I suggest you come on down the forums till you find the Workhorse chassis forum, where you'll find more info specific to your problem, since you have a Chevy P32 chassis.

You are correct in NOT believing what you were told about the shroud...it is essential, and you'll also find about the "air dam" that is a big part of making the air go THRU the radiator to avoid overheating.

Post your concerns in the Workhorse forum...you'll get lots of help there!
Ed
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Old 08-16-2011, 03:54 PM   #3
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Thank you.... The original owner has all the paperwork, the brochure has options checked and the chassis checked is a John Deere, does that sound right.
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Old 08-16-2011, 04:25 PM   #4
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Thank you.... The original owner has all the paperwork, the brochure has options checked and the chassis checked is a John Deere, does that sound right.
OOPS! My bad. YES, you very well may have a JD chassis with a GM 454 motor. That is what I get for assuming, AGAIN.

I forgot that my first MH, also a PA, was on a Deere, but mine had a Ford 460 V-8. My excuse is that I've finally managed to wipe out my memories of those expensive lessons! NOT!

Regardless, your overheating problem HAS to be inadaquate airflow THRU the radiator, since you've had the other work done already. I would concentrate my efforts towards repairs / additions which will make that happen. Did they replace your thermostat?

You can still gain a lot of related info in the Workhorse forum and you are welcome there anytime...even with that Deere chassis!
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Old 08-16-2011, 04:31 PM   #5
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Contact McKinney RV to see if they have your shroud.

McKinney RV-Alabama RV Dealer, Red Bay AL, RV Service




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Old 08-16-2011, 06:59 PM   #6
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They did not replace the thermostat. As a matter of fact, there is none in place. I have only had this for about a month and a half. The guy I got it from said his mechanic told him to leave it out till cooler weather, said they run hot normally. And to tell the whol story when I was bringing it home. About 30 minutes into the trip the shroud got into the fan, when I pulled over the issue began. His mechanic came out and checked it out and nothing else was damaged. Then about every 60 miles I had to pull over and let it cool down.
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Old 08-16-2011, 07:16 PM   #7
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How about fan clutch and cleaning radiator fins, when it gets hot the fan should be making a lot of noise.
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Old 08-16-2011, 07:36 PM   #8
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..... The lower fan shroud is gone. I have been told it shouldn't make that much difference, I don't believe that. ........
You are right to not belive that. Fix that before you do anything else.
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Old 08-16-2011, 07:40 PM   #9
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electric fans not working,I think they had one.
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Old 08-16-2011, 07:49 PM   #10
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I am so glad I found this....You guys have been great. As for the electric fans they do work. i think the flushing did help it did not overheat when I brought it home. I will contact the place suggested tomorrow. i have already told a couple of my buddies about this site. Will start reading tonight to get caught up on the older stuff. Your help is very much appriciated.
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Old 08-16-2011, 08:18 PM   #11
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If the thermostat is missing that can cause the engine to overheat. The water flow is too fast to remove enough heat from the engine. I know this sounds crazy but it is true. The person who removed the thermostat may have had an over heat issue and instead of adressing the problem removed the T-stat. You still may have other issues causing your overheat, look for the following.

Radiator could be dirty and or filled with deposits
Water Pump on it's way out
Fan Clutch slipping
Engine Block water ports clogged
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Old 08-16-2011, 08:27 PM   #12
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has the water pump been replaced with the correct one or do they even know what went back in there. To much water flow is as bad as too little.

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Old 08-16-2011, 08:28 PM   #13
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Since you have a GM 454 engine, it's likely the dashboard instruments are also GM and may be giving a false reading. In my experience, at least the GM engine temperature guage borders on worthless. I had a 1995 Safari TREK 6.5 diesel and when I replaced the failed temp gauge with an aftermarket guage and sending unit, it showed much higher temperatures and lots of fluctuation. My current 1999 Safari TREK 454 gas is an OBD2 chassis and I added a Scanguage which is also much more accurate than the stock GM gauge (and also reads much higher temperature). Your 1988 RV is too old to use a Scanguage, but you might consider an aftermarket temperature gauge and sending unit.

Quote:
Originally Posted by fjstevens View Post
I am new to owning a motorhome, and if this has been asked I am sorry, I couldnt find a way to search previous posts. I have an 88 Pace arrow with a 454 engine. I have had the radiator and block flushed, head gasket checked ( it was ok) but I still have the issue of overheating. The lower fan shroud is gone. I have been told it shouldn't make that much difference, I don't believe that. And I cant find anything on the net on where to find one, preferably used but it doesn't matter. I want to use this MH and have not been able to because of the overheating. Thank you in advance for the information.
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Old 08-16-2011, 09:23 PM   #14
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fjstevens........On that engine......as soon as it starts to get hot, you should hear the fan clutch engage. It will sound like an airplane taking off under the hood. Fan clutches on these engines often went bad because people replaced them with the cheapest they could find. If your not hearing a roar under the hood, its time for a new fan clutch. By a new one from Chevrolet.
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