Doing a normal old oil change. oil looked good, little dark but no glitter, so I didn't pay much attention to draining it. Started cleaning up and got ready to put oil in and noticed like 3 or 4 pieces "hoops" of metal in the drain pan.

Didn't know what it was at first, assumed something in the valve train- pulled valve covers every looked good.

Shoved magnet into the oil pan drain hole and more came out, and more, and more.

I'm pretty certain these are the barrels between the links on the timing chain. need to finish pulling it apart tomorrow..

Any one have an idea what would cause this?? Obviously going to replace entire timing set, pickup tube and oil pump, flush oil galley from filter back to oil pump. motor turns over freely, so not like theres a lot of tension on the chain or anything - this just a cheap as hell timing chain?

 

Is the thrust bearing okay?

 

i couldnt get crank to move fore/aft from the snout. going to pull the pan tomorrow and should be able to push off a main to get an actual measurement

i did just get this engine back from a cooked thrust bearing - machine work for new crank, new oil pump, bearings . doesnt look like timing set was replaced so possible the damage was already done to it.

 

Be curious to know what type/ brand it was. I have never seen that type of failure before.

 

This sounds quite plausible, though when you get it apart you might want to check the cam thrust plate behind the cam sprocket. You never know....

 

From the looks of those pieces, they look like they got real hot like no oil was getting to the chain. Being you already had a thrust bearing issue that wiped the crank out already. Did you check and make sure you had the right clearance between the torque converter and the flywheel before you bolted them together? If its not clearanced right you will definitely wipe out the thrust.

 

clearance was good, converter had failed that led to the thrust bearing issue. trans was sent out cleaned/freshened up, new converter, and engine was machined for new crank, new oil pump and main/rod/cam bearings were all replaced, but work order doesnt say anything about timing set. i'll take some pics of the cam gear...does look like it was taking some heat and can see some tempering towards the teeth - but again i dont know if that was done previously and the few miles ive put on it since getting it back are what did the chain in

this is a dart block, so it has two bolt cam plate. Quick look at it earlier i thought it had a standard ls plate behind it, but there are a few oil galley plugs behind it lol

 

I agree.
Done at the previous failure. Thrust brg goes, crank is jammed forward, cam is retained in place. Severe side loading on the chain segments.

 

thanks guys, went ahead and ordered a cloyes billet single z-racing timing set, oil pump and a few other misc gaskets and stuff to put it all back together.

really not seeing evidence of anything getting past even the pickup tube screen, oil pump in it is clean but not worth throwing it all back together and having a problem to save a few bucks. going to do a couple cheap/quick oil changes to see if anything else happens

 

No identifying marks on the gears. But the chain seems to be stamped with "Rolon" on the links

 

whats the consensus on the "tensioner", the block that goes between the gears?
i bought one just incase i threw the brand new set on and was still dogshit loose but i am 100x happier with the fit on this timing set, can maybe wiggle chain 1/4 back and forth. with the block in there you can barely pull one side of the chain off of it.

 

It just makes sense to use one if the block is drilled.

Ron