problems

I have a hypothetical question that may help me diagnose my 1964 f 134 problem. If the oiling orfice that oils the timing chain got plugged up, what would the symptoms be?

 

Probably just premature wear. Leading to a loose timing chain.

 

Reason why I ask is I have noise from the front of the engine. Running with the belt off for about 5 minutes I get a squeaking-squealing noise. I have also noticed that my oil press is up about 5 psi. Engine sounds great and has 25 psi oil pressure at 1000 rpm warm. I can't hardly believe it is a bearing. I was thinking if the timing chain is starving for oil, after a few minutes of running, the chain wound start to squeak- squeal due to no lube. Has anyone ever seen this?

 

As Billy said, you should have a gear set not chains. Possible that the gears are not getting the proper amount of oil or something has chewed one of the gears up a little.

 

Thanks for the clarification. I thought it had a chain and gears. Gear to gear, I would think, would need less oil. Less moving parts afterall. I will remove the crank pulley and take a look under the cover. If I see nothing, the pan will have to come off. Any other suggestions are quite welcome. Built many engines, but never a f134. My current motor is a bored and stroked 409 Chev. 474 ci 550-600 horse that is getting freshened up and updated. It goes in my 62 Impala SS. Factory 409 4 speed car. Just like the Beach Boys song! Giddyup! But that is another story!

 

I would think the gears would self destruct very quickly without oil, the cam gear is fibre.
Just for giggles, have you removed the fuel pump and then start and run the engine ?

 

I had the vac. style pump and replaced it with a new non vac. style. The noise stays the same. It sounds like a high pitched belt squeal. But it can't be because the belt is on the workbench!R) If you walked up to the jeep when it was running, you would tell me to tighten the fanbelt due to the noise.:?

 

I guess that pretty much rules out the water pump too.

 

T.O.B would be my guess. Assuming its still attached to the trans, in the vehicle.

 

I went right along with that chain mistake. I'm just used to the war era.

You may want to check the crankshaft endplay. I have seen it set incorrectly enough to lock an engine up, so although I've never heard one squeek, I guess it could. That would also make the sound come from the front.

However, even though you say the sound is coming from the front, I agree with SIDSCJ and would touch the clutch pedal to make sure it is not the clutch throw-out bearing.

 

This may be obviuos but.

I always take a piece of hose and hold it to my ear and then probe around until I find right where the noise is coming from.
You will hear it around the spot but it will be really louder when you pinpiont it.

 

Years ago, when I was working in an aircraft piston engine rebuild shop, We had a customer come in with these exact symtoms. The engine was due for an overhaul. He was flying it in to our shop to have it done. Five minutes before landing at the airport, he noticed the oil pressure jump up 5 psi. On short final at idle the engine began to squeal, it still had an "extra" 5PSI. I was outside the building at the time and it sounded to me like a alternator belt slipping, but louder. Well he brought it over to our shop and shut the engine down. When he got out he told us we should replace his belt as long as we were overhauling his engine. Then he told us about the rise in oil pressure. None of the six of us (all A&P mechanics with at least ten years of experiance ), thought much about these symtems. When I dissassembled the engine I found that the #5 or aftmost main bearing was spun but only about 12 degrees in the direction of rotation of the crankshaft. This had caused the oil passage to the crankshaft and the rearmost rods to be blocked and they were starved for oil. Now he had not tried to get any power out of the engine as it was all "downhill" from where he saw the jump in oil pressure. I figure that if he had been much farther then 5 miles away, he would have had to land his airplane in a big hurry. No big deal in Kansas, But here in the rockies it can get very excting very fast!! He was very surprised when I showed it to him, He got a little grey around the edges as they say! I hope that this is not your problem. Please let us know what you find. Matt W.
PS. We tested his belt and alternator for the squeal before we dissassembled his engine, no problems. He got a new belt and his alternator was overhauled.
PPS. We replaceed his blue rods and his heat cracked crankshaft. His crankcase was repairable.

 

I think I got it licked. I removed the timing cover and ran the engine making sure the oiler was working. It was. Then I installed the timing cover without the pulley and stuff and ran the engine. No more noise. Everything looked good so I reinstalled everything. I cleaned the sealing sutface on the pulley and cleaned the seal surface. I greased the seal lip and reinstalled everything. Been driving around for about an hour or so with no noise! I believe from all the muddy water I had been in. 2 feet and more. Mud got to the outside lip of the seal, and after running for a few minutes, would start to squeal. Sounds crazy, but a belt is made of rubber, and so is a seal. I even left the old belt on.

 

at least ya got it - thanks for letin us know

 

Drove it another day, no problems. I know it sounds crazy, but it is the truth. Man I love this Jeep!

 

Sure glad you used smart approach and didn't tear down. Good find. Tnx for posting this for all to read.

 

Another day of driving, and no problems. I will be replacing the rear main seal in the next week or so. Does anyone have any pointers on it. I have never done one on a f134 before. It can be done in chassis I assume? I have an early Chiltons, but I would like first hand experience. Pictures are still coming!