Join Date: Oct 2000
Location: San Diego, CA, USA
I'm wondering if anyone has thoughts on this. I have a '68 El Camino that I bought a few years ago. I was told the engine had about 10K miles on it since a rebuild of some sort. It's just a basic 327. No fancy hotrod setup. The thing ran fine for me for a couple thousand miles, and then it started knocking. I pulled all the accessories and it didn't affect the knocking, so I decided to pull it and tear it down. I've finally gotten around to doing all that. Everything seemed fine with the engine. The bearings look ok, the crank, the valvetrain, the pistons, rings and rods, the oil pump... All that stuff looks fine. Then I went to check the end play on the crank and it came out to about .018, which is of course way out of spec. Out of curiosity, I picked up an old thrust bearing which I had pulled out of another engine and put that in there and checked again. With this other bearing in there, there's virtually no end play. Maybe .002 max. So at this point I'm thinking I'll just buy a new set of bearings and hope the end play specs out ok. The thrust surfaces on the crank look fine.
Anyone think this might not be a good idea? Will excessive end play cause engine knock?
'68 Sport Coupe, '70 Z28, '68 El Camino, '72 Datsun 240z