MopaR&D
Nerd Member
Over the weekend I've been swapping intake manifolds on my 318 from an iron 360 4-bbl. one to an Eddy Performer. While I had one of the valve covers off I noticed that one of my exhaust valve stem seals is cracked and loose. I looked at the others and it seems most (if not all) of them are cracked and falling off. This explains why I've had such massive amounts of smoke from oil burnoff but I don't understand how it happened. The heads, springs, retainers, valves, and seals are barely three months old from when I installed them myself. The engine did overheat a bit when I first fired it due to not having the block full of coolant but I can't think of anything else that would cause the seals to crack. Details: Stock 318 short block, reman'd 302 heads+valves, Fel-Pro umbrella exhaust seals (the only ones that broke I'm pretty sure) Comp 901 dampered springs, Lunati retainers, Lunati Voodoo 256/262 cam, stock valvetrain otherwise.