Sorting out bugs. New TPS and IAC installed, MAF coming today. Installed new factory track bar, tie rod, pitman arm drag link, etc.test drive coming up to diagnose and go from there….
What did you do to your TJ today?
- Thread starter LJRubiconGuy
- Start date
I checked my ring gaps today and got my pistons installed into the block. I started checking rod bearing clearances but seemed to be a bit over on standard sized bearings according to the plastiguage. I guess I’ll revisit this after some more research. The odd thing is that the .10 undersized bearing seemed to have more clearance than the standard. Maybe I’m missing something or doing it wrong but I’ll get it figured out in the next week or so
hoovskins
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Extreme Jeep rescue! Bet you don't see that everyday
Tight with standard rod bearings. I only got the first journal checked. Judging by the green plastiguage it’s just over .025 mm. This is my first time rebuilding an engine so I do a lot of things two or three times before I figure it out. I bought standard and .010 undersized rod bearings because the ones that came out weren’t marked at least that I could find and were all worn so I couldn’t really measure them accurately. I’ll check again this weekend. Maybe I didn’t torque it down evenly enough or when I pushed the cap on the rod bolts I squeezed it too much.
Those fender flares though.
This Jeep sat outside with the driver side facing south or west when it lived in Penix. The left side of the hood, cowl, and front & rear flares have Arizona sunburn and crazing.
On the Son's 01 yesterday, filled engine, tranny and t case with fluids, pulled the rotten gas skid and replaced it. Waiting on O2 sensors from Rockauto, so just fired it up for the briefest instant to make sure pump was hooked back up properly and priming right.
Kiwi TJ
I don't suffer from insanity I enjoy every minute
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That just sounds so wrong.
I heard they had to ban the towns souvenir bumper stickers that said ' I
Penix'
I heard they had to ban the towns souvenir bumper stickers that said ' I
That reminds me of the stickers @Fishtaco had.
Kiwi TJ
I don't suffer from insanity I enjoy every minute
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I remember those all over the news haha
That’s pretty tight. I recall a normal bearing clearance being .002-.003” which is .05-.08mm. You can measure crank journals and rod ends to determine what size you need.
There’s probably an assortment of bearing sizes that would accomplish the clearance you need.
I’ve looked around and all I’ve found is standard, and undersized from .010 - .030. Undersized is for when the crank has been ground correct? Maybe I just need to try it again and see if I get the same results and then go from there. I still have 3 journals that I haven’t checked yet so maybe I’ll learn something in the process lol I don’t have a mike just a decent set of digital calipers so I don’t know how accurate of a measurement I could get on the journals with that.
cool blustery day here in Idaho, thought a closed cab tractor motor over the old Yanmar was just the thing for some spring clean up- heat and a radio too
Yessir that’s right.
You could get a ballpark measurement with calipers. Do you still have the old bearings? If so measure them and see how thick they are. Maybe they’ll have a size or part number on the back side you could use for reference.
Time to size up & hook up the wheel barrow. I made the hitch set -up to pull this, time to get the wiring fixed, new lumber and maybe a little paint to match these two too each other.
A lot of motors have bearings imbetween the std,.10,.20,etc for tightening or loosening clearances on a rebuild. Try a machine shop if you have no luck. Remember too tight is worse than being on the loose end of spec. A cooked or spun bearing means starting over
That’s how I got the main bearings set up. They were clearly marked on the backs. I just had an epiphany after reading your comment though. I took some 1500 grit sandpaper and cleaned the backs of the rod bearings and cleaned up the backs enough to be able to use my phone’s camera to zoom in and there actually is a faint STD marking on the backs. Before and after pictures attached. I don’t remember if I saved all the old bearings or not but this definitely gives me a good place to start!
I dug up a pair of the old bearings after reading @Claytone reply and was able to polish the back side up to find a STD marking under the grime and varnish. Definitely a light at the end of the tunnel