Pilot bushing question:

kennebunksawmill · Jan 16, 2013

I drive a 1983 Jeep CJ7. I just put a new motor in it (remanufactured from NAPA). I have the 5 speed in it. I also installed a brand new clutch & throw-out bearing. I have been driving the Jeep for a couple of days and it runs great, no troubles. Here's my consirn, tonight while cleaning up my workbench, I found my new pilot bushing. I completely forgot about it until I saw it on the bench. Do I need it? Will I damage my motor & trans if I don't install it? Thanks from Maine.

souNdguy · Jan 16, 2013

was the old one bad? if not.. you are probably ok.. though I like to repalce them every time I have a clutch off.. same with TO bearing. cheap insurance.

kennebunksawmill · Jan 16, 2013

It's a new motor, so there was never a pilot bushing installed. I forgot to install it.

Anonymous-0 · Jan 16, 2013

there's a good chance of breaking the tube that the throw out bearing rides on on the trans.

Chris(WA) · Jan 16, 2013

The pilot bushing goes in the end of the crankshaft on that engine right? And its a new crankshaft? You are gonna have to tear it down and install it. If there is no pilot bushing you will wreck your transmission.

souNdguy · Jan 16, 2013

oh.. well... i'd put it in.. if it didn't nned one.. they wouldn't have made the part I assume..

retired farmer · Jan 16, 2013

Yes, you need one. It supports the drive shaft. I would call NAPA and have them check with the manufacturer to see if they come already installed. If not you better pull the tranny and put it in.

rustred · Jan 16, 2013

your in trouble or going to be. you have no trans.input shaft support and who knows what will happen next. thats if your positive there is no bushing in flywheel.

rustred · Jan 16, 2013

just pull the trans. lots easier than pulling engine.

heavyhaulertoo · Jan 16, 2013

Are we sure the flywheel dosn't have the bushing in it? Are you useing the old flywheel?

kennebunksawmill · Jan 16, 2013

I did not re-use the old flywheel, mine was chewed up, so, I bought a new one from NAPA. I am sure there is not one in there, but, I'm suprised it runs so well...no clutch chatter, no noises when shifting, no grinding. I know it needs to come apart and get installed, I'm just suprised it does so well w/o it.

mjsnodgrass · Jan 16, 2013

hopefully the new crankshaft had one installed, but i doubt it. you need the pilot bearing. it supports the front of the input shaft of your transmission.if the input shaft gets to moving around you could damage the clutch disc. in time you will take out the front input case bearing. be sure to soak your bronze pilot bearing in some 30 wt motor oil for a few hours before you install it. without a pilot bearing how did you align the clutch disc?

Dean · Jan 16, 2013

It's a MUST HAVE.

Dean

kennebunksawmill · Jan 16, 2013

It's a bushing, not a bearing. Basically a small bronze sleeve. I had no trouble lining up the clutch disc using the ailignment tool, the trans mated to the motor w/ very little trouble.

just thinkin · Jan 16, 2013

Why not call NAPA and ask them if they put bushings in new cranks.

mjsnodgrass · Jan 16, 2013

you must have pilot bearing/bushing already installed in the end of crank. as the clutch alignment tool is centered/postioned by pilot bearing/bushing, i'm sure you would have noticed had it not been installed.

Anonymous-0 · Jan 16, 2013

Some years of Allis WD45 did not use them. I put a new clutch in mine a few years ago and there was not one in it and the book did not call for one.

MARKS87 · Jan 16, 2013

Without the pilot bearing it would be easier to install the input shaft because the clutch wouldn't have to be concentric with the pilot-doesn't need to be aligned as close. Doesn't it vibrate at higher Rpm's?

GVSII · Jan 17, 2013

(quoted from post at 18:32:30 01/16/13) It's a bushing, not a bearing. Basically a small bronze sleeve. I had no trouble lining up the clutch disc using the ailignment tool, the trans mated to the motor w/ very little trouble.

If the engine mated up with the X/mis. real easy I'd bet the pilot bushing is missing.

blackwidow · Jan 17, 2013

I know for a fact that the old bushing was NOT removed and that a new one was installed...what are the consequences? I have 94 nissan truck...clutch and transmission replaced...but drive shaft in major bind...would it be the pilot bearing?

blackwidow · Jan 17, 2013

i know for a fact that the old pilot bushing was not removed and a new one was put in...i have 94 nissan truck 5 speed..new clutch and replaced transmission...drive shaft in major bind..would the fact that the old pilot bushing not being removed cause the drive shaft problems and what other problems am I looking at now?

souNdguy · Jan 17, 2013

drive shaft from the rear of the tranny?

Jeff B. · Jan 17, 2013

The pilot bearing/bushing fits in the back of the crank on the vast majority of outfits, and not in the flywheel. If it's a bronze bushing I wouldn't even worry about it. They will last a long time and give good service. They are impregnated with oil, so the hotter they get the more oil oozes out of them. If it was a bearing I would be a lot more worried. They can dry out with age and high mileage, and I wouldn't ask for one to last through two clutches. Before bearings became more prevalent in clutch kits, we sold lots of clutches with bushings in them. Some people would fill the pocket behind the bushing with grease. Those units would inevitably be torn down again to fix noisy bushings that wore out the input shaft pilot area. The grease would clog the pores in the bushing and prevent the proper lube operation of the oilite bushings. A properly installed pilot bushing needs no more than a squirt of oil in it to work well for years. Although your old bushing probably had wear, if everything works smoothly I wouldn't worry about it unless it becomes noisy. The noise will occur in every gear and also neutral, any time the engine is running and the clutch is out, and disappear when the clutch is pushed in. (stopped)

Pilot bushing question:

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