overheated then tapping

[M1Garandfan]

Today while driving home my truck overheated and vapor locked. I let her cool down, got her running and made it the rest of the way home. She got real hot on the short 5 mile drive home. All the way home I heard a tapping, I left the air cleaner cover loose and figured that was what it was. When I got home I discovered two things, my water pump shaft wobbles and the tapping is coming from the drivers side of the motor. It sounds like it's coming from just below or just in the valve cover. No coolant spilled, no coolant in the oil. Any ideas would be helpful.

Thanks guys

[Crazy_Jeepman]

It is not unusal that an overheated motor rattle. Sounds like the lifters are colapsing. Let it cool down, start it up let it idle, tapping should go away. I am wondering if your lifters colapsed, making you think it was vapor locked. Why was it overheating?

[ January 31, 2003, 08:42 PM: Message edited by: Crazy_Jeepman ]

[Don S]

Originally posted by M1Garandfan:
Today while driving home my truck overheated and vapor locked. my water pump shaft wobbles
Thanks guys..
M1Garandfan:...
...The wobble means there is the possibility the pump is able to suck in a little air, cavitate and there by not pump water properly. Look again and make sure it’s the water pump shaft. Besides the BAR has that sound... :D :D
Good Luck and ;) CUL.. ds..

[M1Garandfan]

Yep the shaft has a pretty good wobble, the carb bowl was bone dry. I let the truck sit for 2 hours and still had the tapping, dang I hate to change the water pump, but its the tapping that worries me.

[Mud Thrasher]

Sounds like what happened to my new wag. When i bought it they had changed the water pump on it and didnt even do a good job of it. Since ive had it it has had a tap on the drivers side. Sounds like we are in the same boat. I just hope the boat aint takin in water.

[M1Garandfan]

Hey Don 2 The book "Shots fired in anger" has a passage where the guys are running from the Japanese in Burma. The BAR man was the last guy in the column. The author says something to this effect "as long as that BAR kept rattling its comforting sound..."

[Don S]

Originally posted by M1Garandfan:
its the tapping that worries me...
M1Garandfan:...
... Well the tapping may beguin to sound like a ten second squezzz of the little noise making device on a BAR if you don't fix da pump. :rolleyes:
... What comes out of all the new holes in bottom of the pan may not be salvageable brass... :eek:

Good Luck and ;) CUL.. ds..

[JeepBountyHunter]

I agree with Don S there M1......my CJ I used to have with a 304 did the same thing...turned out bad, very bad...thing ran on seven cylinder's with a burnt valve, wore the piston ring on the dead cylinder and bled gas into the exhaust....and down into the oil.....that engine would get very hot..not sure that's the extent on yours..but I'd look into it, before it goes too far......by the way send your address my way again, so I can get those paper's out to you..
Thanks
Aaron

[M1Garandfan]

Do you think I should not drive it if the noise is still there after it sits all night? I was planning on taking it to the shop on Mon. about a 15 mile drive. If something did break its already got 5 miles on it. still idles ok and runns ok.

[Don S]

Originally posted by Crazy_Jeepman:
It is not unusal that an overheated motor rattle. Sounds like the lifters are colapsing. Let it cool down, start it up let it idle, tapping should go away. I am wondering if your lifters colapsed, making you think it was vapor locked. Why was it overheating?..
M1Garandfan ...
... Crazy_Jeepman is one of real knowagable members here. If it's a lifter the engine should make it OK. Continued overheating cycles will take it's toll.

The Germans in WWII were trained to seek the BAR man and the squad leader before starting a fire fight if possible... :( My uncle was wounded during the 'bulge'...

Good luck and ..CUL… ds..

[oddfire]

if the water pump shaft is wobbling its near death, charge the pump asap, I would probly do an oil change and check the fan clucth also.....phil

[M1Garandfan]

We owe all the men that served this country in uniform a debt of gratitude. Men like your Uncle, especially. Was he a BAR man?

I'll takle the pump this weekend and see about the tapping.

[timmirvin]

Since you have to drain coolant anyway, might as well R&R the thermostat as well......

Just a thought to ponder........

Tim

[mechanic58]

Sometimes, when you overheat one GOOD you can cause a lifter to collapse. I've experienced this before. Usually the problems fixes itself...that is if you didn't run it hot for long enough to cause a significant loss of oil pressure that resulted in a (or several) bearing failures. Did your oil pressure fully recover afterwards or do you even know?

[M1Garandfan]

I started the truck again this morning, idles smoothly, for a jeep! Tapping is still there, gets louder as you reve the motor.

Oil pressure looks good. I let the truck idle for five minutes, never got into operating temperature, but the oil pressure needle stayed right at 40 (middle of the gauge) 78 360 J10

[andy d]

just for grins slip the belts off and start the engine. it may be an accessory acting up and not the engine. if the water pump shaft is wobbling, get it fixed quick, you really dont want that fan coming loose and taking out the radiator core.

[M1Garandfan]

I wondered about the steering pump or the smog pump.

The water pump will be replaced that's a new radiator in there! To bad I have to be strapped to this computer doing these darn SDAIE and ELD lesson plans :(

[Don S]

..
M1Garandfan...
... If Andy D’s good idea does not out pull and replace each plug wire one at a time while listening for the noise to change. It should not effect a lifter as much as it would a rod. If you think it is a lifter there is a possibility of a sticking valve.

Here’s a link to upper lube ideas that do even more than help the valve stems
link> CARBON & FUEL ADDITIVES (http://groups.msn.com/JEEPTECH101/jeeptech.msnw)
… it works for me…

My Uncle was the only one of his squad to survive the Bulge. He only carried / used a BAR for a week or two when his buddy got a very small piece of shrappe metal in his arm from a German quad AA gun. The Germans would shoot the quads into the woods at the US guys and the Uncle said you couldn’t hide from them even in a fox hole. My mother mailed him a 'care package'...A dozen yoyos and two snubbed nosed 38s. The uncle said it was the most useful presants he ever got. :D

Good Luck ;) and CUL.. ds..