My 2010 Sport

sirnixalot

I swear if it wasn't for bad luck I wouldn't have any. The auction pictures had the drivers side valve cover pulled to show the valve spring & trunnion upgrade. They did not pull the passenger cover which would have showed both number 4 rocker arm trunnions worn through and both push rods out past the rocker arms. One of the rocker arm bolts pulled right out of its mounting boss in the cylinder head.

I pulled the head fully expecting to see bent valves and fly cut guide marks in the pistons but by some miracle the valves did not hit the pistons so all appears well on that side. Tonight I'll be pouring some gas in the combustion chamber to see if any leaks past the valves as a precaution.

They are doing a partial refund to cover parts and labor. I'll be placing an order for new rocker arms, lifters, push rods, head gaskets and head bolts.

After a thorough inspection of the rest of the top end of the engine I went ahead and swapped out the cam and oil pump. The unknown cam ended up being a Howard 190355-12 cam (232 int./236 exh. duration 0.625 int./0.625 exh. lift 112 LSA) The new Summit 8711R1 cam went in (234 int./248 exh. 0.625 int./0.605 exh. lift 113 +3.5 LSA) along with a Melling high volume oil pump.

Attached Images

	photo_2022-06-13_19-52-56.jpg (132.6 KB, 2 views)
	photo_2022-06-13_20-00-48.jpg (140.5 KB, 1 views)

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2010 Sport - LS3 swap loading
2012 Frontier - BTWTuning VK56DE swap