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3 minute(s) of a 82 minute read
2-18-2014
I think the low oil pressure was because of the wear on the two main bearings that looked scored. There was also evidence on the exhaust port pics of heavy leakage from the valve stem seals. Right now the plan is I'm going to purchase the pistons that have the 22ml dip in them. According to the website they will drop the compression from 10.5:1 to 9.7:1. Not too expensive, and they're forged, not cast. On the intake manifold I'm leaning toward replacing it with the Edelbrock peformer 460 and a Edelbrock perform plus camshaft that's rated at 15" of vacuum @ 1000 rpm. (it comes with the lifters)
I think the manifold/cam will offset the lower compression and hopefully it won't ping on straight premium gas. That's the goal!
Just dropped my engine off at a local machine shop called Kotzur Engines.
According to owner engine was definitely rebuilt once before - it still had the original from the factory FOMOCO bottom end bearings! Also the tops of the piston bores where chamfered, which is not factory.
They will be:
Block and head boiled and checked for cracks
Line bore crankshaft mains
Line bore camshaft bearings
All bearings will be tri-metal
after check of piston sleeve shape, maybe bore over, maybe not, we'll see
might replace the pistons, they are original
non stock RV type cam
Heads:
new hardened seats if needed
new brass valve guides
new valves if needed
springs are original, will be checked
exhaust manifolds trued to head so don't need gaskets
He'll call me back with a estimate later this week - then I have to shell out 50% right away, rest on delivery.
I'll keep you'all informed!
In the meantime, I'll be working on the engine bay.
2-21-2014
Stopped by the Machine Shop today to approve the estimate. First one they showed me was $4742.00. I took a few items off and told them I'd build it up, got it down to $3792.00. I paid 50%, rest on delivery.
Good news is that there are no cracks in the block or heads.
I'll be getting all new pistons, valves, springs, lifters, cam. Crank will need to be turned, they said there was a bad scratch on No.3 main bearing area.
Plan is to put the engine all together with the original intake and carb and run it on the dyno. If it pings we'll put a bigger carb on to test. If no pinging, I'll stay with the stock manifold. If we have to, we'll replace the manifold and carb. Either way they assured me it won't ping.
I took out the porting because it was pretty expensive. I may grind the exhaust towers myself, still debating.
Here's the pics of the estimates:
They had dismantled the heads and they were in the vat for a second time. Here's some pics of the valves and block.
Check out the intake valves!
