| Author |
Message |
guy johnson (Mcigeorge)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, June 17, 2005 - 11:46 pm: | |
1. I just bought a M9 with a 6V92. The owner drove it for 15 miles with us. And when I finally got behind the wheel, we noticed the gauge said there was no oil pressure. When I shut it down, the neeedle gives me a pressure reading. Is there something wrong with my gauge? Or my motor?
2. Low coolant warning comes on after five miles or so, though I topped it off and it only took a half to a gallon. THe sight bubble doesn't seem to show any coolant in it, but the relief on the tank will let out liquid. Again, do I have a bad sensor, or what do you think the problem is? |
Jtng
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, June 17, 2005 - 11:53 pm: | |
Could you post the seller's name, so no-one else buys from him? |
Jtng
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, June 18, 2005 - 12:14 am: | |
Oh well...
A bad ground may cause erratic (oil) gauge readings.
No water in the sight? Yet it bubbles out the fill? And the low
water light lights? It's probably safe to assume it's low on coolant.
But why? Was there once an overflow tank that's been removed?
A restriction in the fill tube, maybe?
Welcome to the wonderful world of ulcers; another Maalox moment. |
Bob Vandawalker (Rav221)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, June 18, 2005 - 8:39 am: | |
When I purchased my bus the only gauges working properly were the air pressure and speedometer. Fuel, oil pressure, water temp, low coolant levels either were funky acting or didn't work at all. However, checking at the engine everything was within normal range.
These older buses travel many dirty miles through all types of conditions, the grounds and connections are prone to fail. Try cleaning connections on the gauges and sensors.
My low coolant indicator also comes on periodically but the level is fine and stays cool.
Sometimes (like mine) buses have service gauges in the engine compartment, check and see if your oil pressure gauge there is working OK.
Good luck, gauges will likely turn out to be one of the smaller issues you'll encounter.
Bob V.
New York |
ChuckMC9 (Chucks)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, June 18, 2005 - 10:09 am: | |
"THe sight bubble doesn't seem to show any coolant in it, but the relief on the tank will let out liquid"
On mine if it's completely full, you can't tell it from the sight glass because the waterline is above the glass and you can't tell whether it's completely full or completely empty. Only when you try to add coolant and it runs down the side of the bus do you know it's _too full_. grrrr. |
Sojourner (Jjimage)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, June 18, 2005 - 11:08 am: | |
About oil pressure gauge....sound like electrical connection problem not engine. Common guage problem is 1)poor grounding 2) broken connections 3) sometime cross connection or bare.
If you don't have manual or not interest to do fix it yourself, and then look for bus charter shop that is knowledgeable troubleshoot wiring connection.
Without for me being there to diagnose your problem, it very time consuming and many e-mail to pin point the poor or missing connection.
About low coolant light…same as above or senor unit or relay.
Bus manual called “Maintenance Manual” is most important to own. It has the entire wiring diagram you need.
Some charter bus driver ignores some light indicator as per their mechanic because they think it will be ok to drive. You & I don’t go along with it because as new owner, we want to manage & correct what it being said via tell-tale.
FWIW
Sojourn for Christ, Jerry |
guy johnson (Mcigeorge)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, June 20, 2005 - 9:04 pm: | |
Thanks for all your responses. It doesn't seem to have any oil pressure problems. It will be completely full on the dipstick, when the motor is running, it is obvious the oil is being pumped around, because lack of oil on the dipstick.
Coolant--It seems that I couldn't simply pour the coolant in to fill up the system.... it needed to get hot and circulate around a few times before it finally topped itself off. We now have 100 miles on it, and even my wife smiles at the idea of taking a ride.
BTW: It must be wiring problems on the gages, bcz when I shut off the bus, it shows 50 lbs of oil pressure. But 0 when it is running. Thanks again for the help and things seem to be running smoothly. |
Earl-8-Ky
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 21, 2005 - 10:44 am: | |
Sounds like the wires are reversed on your gage. |
Jtng
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 21, 2005 - 11:17 am: | |
The "lack of oil on the dipstick"....."when the motor is running",
is an indication that "It doesn't seem to have any oil pressure problems"?
Yaaahh....oooookay...
The wire to the gauge may be broken, or disonnected at the
sensor. My MC9 gauge reads upscale with the key off also.
It's what it reads with the motor running, that counts.
I'd bet you could run it a month with very little oil pressure...
Then, once the new replacement engine goes in.... |
Alton Gattis (Fiddlearound)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 21, 2005 - 12:24 pm: | |
The cooling system might need "burping". When my mechanic flushed my system last summer there was air captured somewhere and you couldn't put the proper amount of water/coolant in. It appeared to be full, but after only a few miles I couldn't keep the temperature below 200 degrees no matter how slow I drove. Took coach to another shop and they purged the air from the system and added over 9 gallons of additional water/coolant. |
David Hartley (Drdave)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 22, 2005 - 6:40 pm: | |
You may have to purge the crossover line between the thermostat housings to get the air out. It is a high spot the way it goes up and over and across the fuel pump area. There are lots of purge fittings located in various places on a 9 even the heater cores up front have them. |
guy johnson (Mcigeorge)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 22, 2005 - 11:41 pm: | |
Thank you for your input on my problems. The coolant is staying at a good level and doesn't get hot. I turned the screwdriver around and gave the gage in the engine compartment a rap and presto! I fixed my oil pressure problem. I probably need to replace my electronic gage up front. I tried switching the wires and it didn't help. |