Follow up to valve job

[pdplot]

Re-torqued the head to 75 lbs. and re-adjusted the valves. Compression has increased since I first checked it. Now: 150, 149,125(sooty plug too), 150, 149 and 134. Still some smoke on startup but I have to change the oil since penetrating oil must have seeped into the sump. Got a filter cartridge at my local NAPA and will change out old oil. Hose connection (top hose) to heater leaked twice - no lip on pipe - but I reset the clamp near the end and really tightened it and the leak was stopped.With 104K miles on this engine, I wonder how many more miles it has until rings & bearings? How long do these engines last?

 

[poolboy]

A lot depemds on how the engine was maintained and driven since new.
I overhauled a TR6 engine at around 100k miles and the machineist after measuring the cylinder bores, said at the rate it had worn so far, it might go another 200k miles before it needed boring and over size pistons. Crankshaft Journal showed only one rod journal that was slightly out of round.....
I found that reassuring, but who knows. I know I won't be around long enough to verify that, but I do still run that short block and have another 20k miles on it since.



On the other hand I had a completly rebuild TR6 engine only last 20k miles before the cam and tappets started deterioating, not long after, a replacement oversized piston just disintergrated.
The message here, at least for me, is keep the engine in it's original condition as long as possible.

 

[glemon]

Similar story, my motor had 90,000 plus mile when I got it, machinist said we could get by with rings and bearings (stock size) so minimal wear to the motor at nearly 100K. I would definitely check crank end float to see if the thrust washers are worn out or wearing out, this is usually the first thing to go on these motors. Greg

 

[pdplot]

I replaced the thrust washers last year. They were in place and only slightly worn. Oil pressure is good and the engine sounds great - usually a bad sign...like in the old Westerns "It's quiet out here. Yeah - too quiet." You remember what happened next.