engine rebuild problem

bman · Post by **bman** » Fri Oct 05, 2007 11:37 pm

Need some advice/help. Just put in the engine I rebuilt,Ran it at 1500 -2000 rpms all week,everything seemed ok. Tonite it froze up on me while i was trying to check timing,his evening .(crap).Looks like the bottom half is locked up,took the timing belt off,cant turn crank.Cams turn along with everything else. Needs some advice,whats steps do I need to do to diagnois problem? Is there anything I can do without pulling engine out of car?? Thanks

racydave · Post by **racydave** » Fri Oct 05, 2007 11:44 pm

Bummer! Think Id be lookin for a used engine.

mdrburchette · Post by **mdrburchette** » Sat Oct 06, 2007 7:47 am

What bad luck! Could the auxilliary shaft cause this? It would probably be easier to pull the engine out of the car to check the bottom end.

bman · Post by **bman** » Sat Oct 06, 2007 8:32 am

No the aux shaft is also free turning. Your probably right on pulling engine out,dont know what I could determine if I talk the head off first.

So Cal Mark · Post by **So Cal Mark** » Sat Oct 06, 2007 12:12 pm

better just to take it out, there isn't much you'll be able to fix with the motor in the car anyway. ow was the oil pressure?

bman · Post by **bman** » Sat Oct 06, 2007 3:46 pm

Mark,dont know what oil pressure was,dont have oil gauge,dummy light wasnt on though,cam boxes looked like plenty of oil was in there.

mbouse · Post by **mbouse** » Mon Oct 08, 2007 11:54 am

i have a '74 1800 engine for sale. running when parked due to severe cancer of the underbelly in June of this year.

I will make you a sweet deal, but you gotta come to Michigan to pick it up.

No deliveries.

bman · Post by **bman** » Mon Oct 15, 2007 12:10 am

Mike thanks for the offer,but I spent to much on the one thats not working. I pulled the engine,and the#2 connecting rod bearing is the problem. This was also my original problem.I took it to the machinist and I had the crank done and put oversized bearings in it, along with replacing the rod. Im not sure what happened? The bearing didnt spin. Im pretty sure the oil passages were clean,but the bearing looks like excessive wear,as compared to others. Plan on taking crank back to the machine shop,any other ideas, suggestions would be welcome. Ted

So Cal Mark · Post by **So Cal Mark** » Mon Oct 15, 2007 12:22 am

I'm wondering if the oil passages in the crankshaft were checked and/or cleaned since the problem is the same this time around. What undersize was the crank ground to? Did you check clearances after assembling the lower end?

bman · Post by **bman** » Mon Oct 15, 2007 1:17 am

Mark, bearing size.010 over. This is my first engine rebuild,but im pretty sure I plastigauged the bearings. I did see some metal filings inside the crank journal hole,I ran an insulated wire through hole,and had some filings come out. If I did it right I miked the journal it was 50.55mm does this sound correct? (2liter?). If its within specs,I have a thin line on the journal with a small burr in the center,almost as if came out of hole in journal.Can this be buffed out,with crocus cloth or something else? Ted

So Cal Mark · Post by **So Cal Mark** » Mon Oct 15, 2007 1:40 am

if the crank isn't scored too badly it could be polished. I'd also get the rod checked to make sure it's round

bman · Post by **bman** » Mon Oct 15, 2007 1:48 am

Ok, the rod is new,I had it replaced with original problem.Thanks Ted

So Cal Mark · Post by **So Cal Mark** » Mon Oct 15, 2007 1:55 am

but if it froze up, I'd get it checked and by all means clean the oil passages in the crankshaft

racydave · Post by **racydave** » Mon Oct 15, 2007 5:48 pm

The oil pick up for the oil pump can get clogged up. Id check the oil pump carefully.