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Author Topic: water pump out in SC, need info please.  (Read 1802 times)
Devin & Amy
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« on: March 13, 2007, 06:50:11 PM »

Hi all,

We pulled into a campground in Manning, SC. The water pump is leaking out of a hole in the center of the pump close to where it mounts to the block. I need info on where to get a replacement for an 8v71  in a 1980 MC9. Standard tranny, reg radiators.
I have the tools just need the supplier.

I need to know if this is like the old Chevys where when the water pump leaks out of the hole, it is bad. Can it be rebuilt, or do I need to purchase a new one?

Any tricks for changing a water pump?

Devin
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ol713
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« Reply #1 on: March 13, 2007, 07:29:04 PM »


Hi;
   You have it right,  the leak is just like the old chevies.  I don't know
   how larg a town Manning is,  but you might check the phone book and
   find a local charter company.  Ask the shop foreman where he gets
   parts.   Your pump can be rebuilt but, again you will have to check
   with the forman.  Changing it out is pretty straight forward after
   draining the coolant.
                           Good luck.   Merle.
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Sojourner
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« Reply #2 on: March 13, 2007, 08:51:14 PM »

Hi Devin; here a link with few truck parts supplier near Manning or Sumter SC.

http://national.citysearch.com/search?context=generic&query=truck%20parts&cslink=cs_topbar_search&submit.y=9&submit.x=30&searchOpt=cs

NAPA can usually get you the large truck parts needed in a day or so.

Might call a large marine DD parts source….think it use same pump???

Whatever you do…check for bubbling on dip stick via using lighter heating under oil coated dip-stick. If it do not bubbling & popping while over flame to get it hot….which mean no water in oil. Water boil before oil.

I had seen one who had water pump leaking (gear drive) water for long time that it got in engine’s oil sump too.

Wish you well.

FWIW

Sojourn for Christ, Jerry
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prevost82
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« Reply #3 on: March 13, 2007, 09:00:26 PM »

make sure you get the right inlet and outlet.... there is two or three options on offsets on them.
Ron
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muddog16
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« Reply #4 on: March 14, 2007, 03:48:48 AM »

Ron is correct there are many housings, on the rear of the suction (left)leg there is a number for the housing, the guy who put the number on the rear had a business selling those cute little collapsible mirrors! Good luck!

Pat
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Pat

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Dallas
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« Reply #5 on: March 14, 2007, 04:02:44 AM »

Devin
I'm about 50 miles from you.
If you need some help you can call me at 843.496.9176

There are a couple of truck wrecking yards here and a couple south of you within about 50 miles. (Walterboro comes to mind).
There is also a Peterbilt, International and Mack dealer here.

As others have said, check the number for the offset on your pump.

Dallas

PS:
Oh, and I forgot to add that I have a torch and a welder along with easy-outs I can bring along.
DF
« Last Edit: March 14, 2007, 04:25:46 AM by Dallas » Logged
wrench
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« Reply #6 on: March 14, 2007, 05:16:52 AM »

 There is a guy there Slick can probably help you: Clarendon Auto Parts
511 South Mill, Manning, SC 29102
tel: 803-435-8888, & I call & he may have it in stock depend on model.
           wrench
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JackConrad
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« Reply #7 on: March 14, 2007, 05:35:16 AM »

There is also a difference between left and and right hand rotation engines, The first pump I got had the gear teeth cut the opposite direction. The inlet and outlet are usually refered to as "Standing" or "Running". The seal can be replaced. I purchased a new new seal and tried that before replacing the pump. I should have just repalced the pump to start with (and my bus was sitting in my shop).  Best bet is take the old pump with you.  Jack
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« Reply #8 on: March 14, 2007, 06:31:08 AM »

http://www.bepco.biz/WaterPumpCat/9-12.pdf

The second page will have photos of all three types for the 71 series(running, walking, standing), plus part numbers.

Carquest and Napa carry Bepco and some other parts stores can get these overnite or may have one in stock.

The reverse gear one(7118X) is for marine application that had reverse camshafts. On the highway engines (LH & RH rotation) both engines the cams turn the same way. Only the cranks turn reversed. A truck or bus will never use this one.

The only trick to changing one is gonna be a bolt that goes in from the back side. Other than that just dive in. Good Luck.

HTH,
Dale

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gumpy
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« Reply #9 on: March 14, 2007, 07:03:20 AM »

There is also a difference between left and and right hand rotation engines, The first pump I got had the gear teeth cut the opposite direction. The inlet and outlet are usually refered to as "Standing" or "Running". The seal can be replaced. I purchased a new new seal and tried that before replacing the pump. I should have just repalced the pump to start with (and my bus was sitting in my shop).  Best bet is take the old pump with you.  Jack

Ok, so someone explain the "proper" way to determine left vs right hand rotation on a bus engine.  Devin called me last night about his pump, and this came up, and I realized I don't really know what it means or how to determine. All I know is GMCs are one way and MCIs are another, and I don't even know which I have!

If I'm standing at the rear of my bus looking at my engine which faces the rear, what am I looking for?  Without going out and cranking it, I think the crankshaft pulley rotates clockwise. Is this considered right hand or left hand rotation? Or am I all wet and just don't have a clue... again?

craig
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Craig Shepard
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http://bus.gumpydog.com - "Some Assembly Required"
Dallas
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« Reply #10 on: March 14, 2007, 07:16:59 AM »

There is also a difference between left and and right hand rotation engines, The first pump I got had the gear teeth cut the opposite direction. The inlet and outlet are usually refered to as "Standing" or "Running". The seal can be replaced. I purchased a new new seal and tried that before replacing the pump. I should have just repalced the pump to start with (and my bus was sitting in my shop).  Best bet is take the old pump with you.  Jack

Ok, so someone explain the "proper" way to determine left vs right hand rotation on a bus engine.  Devin called me last night about his pump, and this came up, and I realized I don't really know what it means or how to determine. All I know is GMCs are one way and MCIs are another, and I don't even know which I have!

If I'm standing at the rear of my bus looking at my engine which faces the rear, what am I looking for?  Without going out and cranking it, I think the crankshaft pulley rotates clockwise. Is this considered right hand or left hand rotation? Or am I all wet and just don't have a clue... again?

craig


Craig,

Looking from the flywheel to the fan, GM V-drives turn Clockwise, All other T-drives, (MCI, Iggle, V.H., Setra, etc.), turn Counterclockwise.

But then again, the water pumps all turn the same, except for the marine LH engine which has the waterpump turning the opposite way.

Nothing like standardization  to make life easier.

Dallas
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gumpy
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« Reply #11 on: March 14, 2007, 10:12:05 AM »

Ok, but does that make a GM right or left handed?  Is that the standard view when determining?  So if you are at the flywheel and it turns counter clockwise (MCI), then that's left handed?



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Craig Shepard
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Dallas
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« Reply #12 on: March 14, 2007, 10:37:55 AM »

GM's are LH. T-Drives are RH turn.

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Happycampersrus
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« Reply #13 on: March 14, 2007, 11:11:32 AM »

If you are looking at the balancer, if it is turning CCW it is a Lefthand rotation. That engine is found in the GM Vdrive buses that the engine is in sideways.

If you are looking at the balancer and it's turning CW it is a Righthand rotation.
That engine is found in Tdrive buses and trucks.

The book kinda makes it hard to figure out, because you can't see very many flywheels turning. Grin

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gumpy
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« Reply #14 on: March 14, 2007, 12:24:27 PM »

If you are looking at the balancer, if it is turning CCW it is a Lefthand rotation. That engine is found in the GM Vdrive buses that the engine is in sideways.

If you are looking at the balancer and it's turning CW it is a Righthand rotation.
That engine is found in Tdrive buses and trucks.

The book kinda makes it hard to figure out, because you can't see very many flywheels turning. Grin


Ok, that makes some sense.

Dallas' explaination made sense till he said GMs were left hand, then it didn't make any sense at all.  Roll Eyes

I knew that the MCI engines were basically the same as are used in trucks, but until I got into this hobby, I never knew there were some that turned the opposite direction and I'd never heard the left hand / right hand stuff.

thanks



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Craig Shepard
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http://bus.gumpydog.com - "Some Assembly Required"
Devin & Amy
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1980 MC9 8v71 4spd man. Fulltiming family of 6




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« Reply #15 on: March 14, 2007, 06:17:09 PM »

Hi all,
Thanks for the help!!! Grin

I did get the pump from Slick, he was a great help. The pump I purchased was the "regular" pump for an 8v71. The teeth on the drive gear were reversed. The next pump I could get would have been 2 days out, and being the impatient man that I am, I decided to remove the drive gear from my original pump and change it with the new one. I spoke with many experienced individuals today by phone and the going opinion was that I should wait for the "correct" pump. But, I talked with a man who maintains a fleet of charters and he said that there really is no difference in the actual pump itself, just the drive gear.

The pump installation went well. As I'm standing there listening to everything come up to temp. and watching for the explosion of leaks to appear at any minute, a thought crossed my mind.

How do you know if your water pump is working?

I was relatively sure that I had done everything I should have, i.e. check bolts, check fluid levels, pretty much all I could think of to double check. But, I didn't know how to check the flow of water. I had to just wait til the normal engine temp was reached, and then worry if it was just going to keep on going without stopping.

How would YOU have done it?

Thanks to all who were there for me when I had questions.

Devin

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Devin, Amy, and the kids!!
Happily Bussin'!!
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