Lowrange2

The hubs are, in fact, different.

Since you already have rotors pull the old one off and lay it flat beside the other one and measure the hat height. If they're the same... go for it.

I'm betting that they will be different though.

spenmasc

So I got done replacing the motor on 2001 Cherokee got it all put pack together, and it fired right up. After running it at about 2500 rpms for 15 minutes i let it drop back down to idle. While idling i notice a pretty good tick. From the what i know and have been told is that it seems to be a sticky lifter. Other than tick after a little while of running i reved it up again to see if the ticking stopped when at higher rpms and listening more carefully i noticed it was still the and just speeding up with the revs. This time when i brought it back down to idle the engine began shaking a little and had an occasional pop. Also my cat began to glow red hot. I'm pretty sure that means that fuel is just dumping down the exhaust. I'm still pretty sure its a lifter. So right now i have things taken apart so that i can pull the head. I have the valve cover off but i'm kind of unsure of a good method to figure out which lifter is bad. i don't have a diagnostics machine to read the code to maybe narrow down the cylinder. Any ideas???

Lowrange2

I assume this was a new rebuild?

spenmasc

no i put in a used motor.

Lowrange2

Then why did you run it at 2500 RPM for 15 minutes?

spenmasc

I have never done any engine work before and a friend of mine told me to do it, because that motor had been sitting for so long and it would apply the oil pressure to the parts that may have been stuck or corroded from sitting under pressure. Like i said im not too knowledgeable in this area.

Lowrange2

If anything you should have disabled the ignition and spun the engine over with the starter 10 or 15 times to prime the oil pump.

Either way, pull the valve cover off and look for bent push rods or broken valve springs.

Don't listen to your friend anymore.

spenmasc

I certainly will not. None of the valve springs seem to be broken. And none of the push rods are noticeable bent but ill try rolling them on a good flat surface just to be sure.

Lowrange2

How many miles are on the engine? Might not be a bad idea to have the head rebuilt and pull all the lifters for inspection.

spenmasc

I got it from a company called AIM Auto Parts. They said it only had 62,000 on it but from looking at it i find it a little hard to believe.

trojanchrokee

looks like ya dropped the soap on this one, the engine company screwed ya, good luck tho sounds like a hell of a problem

Brennidon

Im trying to take off the sway bar links off my 87 cherokee but i cannot figure out what size torx bit i need. anyone know?

salad

For the bottom bolts? Don't bother, they're actually splined (not sure if this is the correct term) like wheel studs. Remove the nut and pound or press em out.

karl4x4

Removing the lifter for inspection is a great idea but not the first step I would do.

I would take the valve cover off and rotate engine by hand and measure every valve's lift to ensure it goes up and down the same amount with spring pressure and all. Of course this is done with a special tool but often when a cam lobe is worn out its easy to see that one valve is not oppening.

Of course this is almost worse case senario. If cam lobe is damaged, you will see it on the lifter anyway but at least you don't have to take the head off to figure that one out. If they valve open and close the same amount, then I would look at bent rod/rocker or a stuck lifter.

Good luck

karl4x4

I think the term is "press fit"