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Topic: Advice? ...overheating in Nacogdoches  (Read 2894 times) previous topic - next topic

Re: Advice? ...overheating in Nacogdoches

Reply #20 –
There should have been an alarm prior to shutting down.  If there wasn't, find out why.

You won't regret investing in a Silverleaf or whatever that other system that some are using because you can watch the temps so much more closely than with the gauges. 

There are so many things to get used to on a coach.  I'm sorry you're having this trouble right off the bat.  It's probably something simple.  Don't get discouraged.

Re: Advice? ...overheating in Nacogdoches

Reply #21 –
Was the thermostat replaced with the engine flush? ? ? ? ? ?

Re: Advice? ...overheating in Nacogdoches

Reply #22 –
Quote from: ITguy –
The temps are much too high, too quick to make it back to dallas.  I'm suspecting the coolent is not circulating, as the overflow was cold, despite the high temps
I would think that overheating due to loss of coolant circulation would either require both of the dual thermostats to be stuck closed or plugged up with something, OR the coolant filter to be plugged up with junk knocked loose by the flushing procedure.

Did they change the coolant filter after the radiator flush?

Will the coolant filter automatically bypass if it gets plugged up?  I don't know...

Re: Advice? ...overheating in Nacogdoches

Reply #23 –
Quote from: Chuck & Jeannie –
I would think that overheating due to loss of coolant circulation would either require both of the dual thermostats to be stuck closed or plugged up with something, OR the coolant filter to be plugged up with junk knocked loose by the flushing procedure.

Did they change the coolant filter after the radiator flush?

Will the coolant filter automatically bypass if it gets plugged up?  I don't know...
The water filter is a bypass filter, you could plug it off and the cooling system would still work fine except for removal of contaminants.

Re: Advice? ...overheating in Nacogdoches

Reply #24 –
There is also a valve on the coolant filter to shut off flow during filter change. Wasn't there something about returning to the full open position after filter change. Don't recall if it bypassed in closed position.
Scott

Re: Advice? ...overheating in Nacogdoches

Reply #25 –
Quote from: ITguy –
  I'm suspecting the coolent is not circulating, as the overflow was cold, despite the high temps

Being able to place your hand in various places and judge the heat flow is a valuable skill.  But, the coolant overflow tank is not part of the circulation and should not be hot.  If the coolant overflow tank is hot, then you have other problems.

It may be time to check for a collapsed hose and replace the thermostat(s).

Re: Advice? ...overheating in Nacogdoches

Reply #26 –
With the valves closed no coolant gets to the filter. Opening again would put the filter back in operation.

Re: Advice? ...overheating in Nacogdoches

Reply #27 –
Thanks for the words of encouragement.  I knew when I purchased an older coach there would be some maintenance fun.  Fortunately our Rig worked perfectly on our most recent vacation.  Given that it's at it's birthplace, I would hope they can quickly rectify the situation.
I just had transmission fluid change, new ladders, slide bladder replacement, several aquahot leaks fixed.  When I first picked it up we got new tires, air bags and an airforce one.

Next is windshields, captins chairs, and side windows fix.  I have 15 years until I retire, I figure if I start now it will be ready to go by then...  I might even be able to talk my wife into a paint job in Mexico.  :D

Re: Advice? ...overheating in Nacogdoches

Reply #28 –
Quote from: dsd –
There is also a valve on the coolant filter to shut off flow during filter change. Wasn't there something about returning to the full open position after filter change. Don't recall if it bypassed in closed position.
Scott
This could explain it in 20 miles.

Re: Advice? ...overheating in Nacogdoches

Reply #30 –
Is she getting stripes or swirls? ? ? ? ? ? ? ? ? :o

Sorry, couldn't resist.

Larry

Re: Advice? ...overheating in Nacogdoches

Reply #31 –
Now that the Labor Day weekend is pretty much finished, I hope that ITguy will let us know if there was any engine damage from the high temperature running.  Also what was the root cause.

Re: Advice? ...overheating in Nacogdoches

Reply #32 –
All of the electronic engines should be protected from overheating damage with the computer automatically going into shutdown if the temp gets too high.

The GVs have the steering wheel rim in the way of the warning lights, at least on our coach with my height. When we lost a hydraulic belt, my view of the warning light was blocked so the first indication of a problem was when the engine went to 50 percent power and then shut off. If pulling a load and the belt comes off, the temperature will soar in just seconds so tough to catch it on the gauge.

Pierce

Re: Advice? ...overheating in Nacogdoches

Reply #33 –
"If pulling a load and the belt comes off, the temperature will soar in just seconds so tough to catch it on the gauge."

Another good reason to use VMSpc.  You can set an audible alarm for temp. and other gauges.

Re: Advice? ...overheating in Nacogdoches

Reply #34 –
Every engine design reacts to being operated at high temperatures differently.  Historically there have been engines that seemed bullet proof and those that reacted to a warm day with "I think I need to see a mechanic."  I fear that the new computer protected engines fall into the latter category.

Re: Advice? ...overheating in Nacogdoches

Reply #35 –
Quote from: ohsonew –
Is she getting stripes or swirls????????? :o

Sorry, couldn't resist.

Larry
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Since she is a VERY patriotic Air Force brat, maybe we get her and the coach matching Thunderbird paint...

Re: Advice? ...overheating in Nacogdoches

Reply #36 –
Quote from: folivier –
"If pulling a load and the belt comes off, the temperature will soar in just seconds so tough to catch it on the gauge."

Another good reason to use VMSpc.  You can set an audible alarm for temp. and other gauges.
---
I've thought about building it on an old laptop I have but honestly the ScanguageD I picked up open box for $60 can pull a lot of the same data, although not as pretty... one of these days I may pick up a cable from silver leaf. 




Re: Advice? ...overheating in Nacogdoches

Reply #37 –
Quote from: ITguy –
"If pulling a load and the belt comes off, the temperature will soar in just seconds so tough to catch it on the gauge."

Another good reason to use VMSpc.  You can set an audible alarm for temp. and other gauges.
---
 I've thought about building it on an old laptop I have but honestly the ScanguageD I picked up open box for $60 can pull a lot of the same data, although not as pretty... one of these days I may pick up a cable from silver leaf. 

FWIW When quoting previous text, begin your text after the "[/quote]"

That being said, Welcome!  This Forum has been our go-to source for information and conversation.

Re: Advice? ...overheating in Nacogdoches

Reply #38 –
Quote from: Old Toolmaker –
Every engine design reacts to being operated at high temperatures differently.  Historically there have been engines that seemed bullet proof and those that reacted to a warm day with "I think I need to see a mechanic."  I fear that the new computer protected engines fall into the latter category.
Yes they do. The CAT 3208, Cummins 5.9 used in Foretravels are parent bore engines with no liners. They can be bored or bored with liners pressed in. Labor intensive. These engines will tolerate some overheating without damage.

Dry liner engines have a steel liner pressed in so it may be removed and another pressed in. Still a bit labor intensive as the liner after installation, sticks up above the deck of the block slightly and has to be milled down flat with the block. These engines will also tolerate some overheating without damage.

Wet liner engines are made so the owner/operator can change out the liners in a barn if necessary. The steel liners are inserted in the bore with shims at the bottom and then checked with a dial indicator to make sure they meet height specifications at the top of the block. Only then are the sleeves removed, seals installed and the sleeves re-installed. While not needing special equipment other than a few normal garage tools, it's still takes time to do correctly. Because of the seals at the top and bottom of the sleeves, these engines don't tolerate overheating as well. The effects of overheating may not be immediately apparent but a continued  pattern of high temperatures may cause seal failure and a coolant/oil mix resulting in a $30K shop bill.  8.3 and larger Cummins, Detroit 2-cycles as well as some CATs are wet sleeve engines.

The term "throwaway engine" is only used where the cost of labor to overhaul is so high that it's cheaper to buy a new one. Unless the block is warped from overheating or a rod has gone through the side of the block, all engines can be successfully overhauled. It's just the price that determines the choice.

While it's difficult to run a diesel too hard, they can be abused with high EGTs, shutting down with high oil temperature, extended idling and overheating. This is why some engines greatly exceed the B-50 life while others need rebuilding well before they should.

Pierce

Re: Advice? ...overheating in Nacogdoches

Reply #39 –
Diagnosis is I need to replace the hydroloic pump..