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To properly clearance a crank scraper, you must install ALL the pan bolts and tighten them. Did you clearance the scraper at the oil pump? There is interference there.
The holes in the crank scraper are slightly off and careful assembly (read a lot of time) is required. Also, when you silicone the scraper to the block, all bolts must be installed and tightened. Check it all…Chuck
Have you pulled the valve cover to see if anything is bouncing around in there?
Pull the plugs and take a look at them. If there’s something bouncing around inside the cylinder it can break off the ground strap on a spark plug. This usually is the result of detonation and a chunk of piston breaking off. But since you just completed assy…
Just a couple of ideas to maybe help locate the source of the noise.
I hope it’s something real simple and noncritical. 
cwbaader wrote:
I made this error but caught it when I went back in to install my new oil pump. Fortunately I’m a couple of weeks away from getting the motor in the car.
This interference will result in little to no oil pressure because the pump is prevented from sealing against the block.
if the sound is “timed” like a valve it could well be the scraper, hitting every third revolution…or is it six/ or two? Oh well, i hope that is all it is.
Al
If you’ve pulled a head off you know that there are two locating pins on the block. The block I’m working on has always been missing one. Although this was irritating when installing the head 18 times this year, I got used to it.
I thought that the purpose of the pins were to locate the block when you first put it on so you can more easily get the head bolts started. But I guess it actually helps locate the block until you get the head bolts tightened down. That means you could have all your head bolts started, but still not have the heads on exactly right.
Al K*****r, the other Savannah SpecE30 guy, and I last night thought that we had the sound isolated to the top of cylinder 6, and maybe the intake side. Carter Racing and I removed my head today and looked hard at it. If you look really closely you can see a slight polishing of the top #6 piston on the intake side. A matching, very slight polishing is visible on the #6 combustion chamber.
Not only am I missing the locating pin at the rear of the block, but I also had to get the head decked a couple months ago after I scratched it’s surface during head removal 10,004. We think that the combo of decking and a shift of the head during installation, due to lack of that locating pin allowed the piston to ever so slightly impact the head.
The shop feels that the rod bearing probably survived it, so I’m pretty much good. I’ve grabbed a locating pin off of my spare block and I’ll put the head back on tomorrow.
I’ll probably have to take the day off of work tomorrow to get ready for Road Atlanta on Friday, but there’s cause for optimism. Woohoo! 
More than anything, the locating dowels locate the head gasket and the head. You probably had the gasket shift and get trapped between the piston and head. Check the old gasket carefully…see you this weekend. Chuck
If the piston is hitting the valves you might be well advised to purchase an oversized headgasket…
Ask me how I know.
If that doesn’t get you enough clearance, you’ll have to use a .020 deck plate.
Ask me how I know
RP
Neither the headgasket or the valves show signs of hitting anything. It looks like the piston face was just barely whacking the head. The face of the piston on the intake side protrudes from the block at TDC.
Glad you found it. One of those pins was what I was thinking might have fallen in a piston on the spark plug idea.
Are you sure you didn’t clip a valve and tweak the stem? You saw the rub on the #6 piston and combustion chamber. I’d be concerned about the valves being shifted enough out of their relief cuts in the piston top and contacting the piston with the edge of the valve. Maybe the exhaust valve more so than the intake?
Do a compression and or leak down if you have time. You may not be able to tell until then.
I think this is all a clever, complicated, intricate ruse designed to cover up blatant over-decking of the head to increase compression ratio.
Well played, though. I won’t protest you. 
Steve D.
Steve D wrote:
[quote]I think this is all a clever, complicated, intricate ruse designed to cover up blatant over-decking of the head to increase compression ratio.
Well played, though. I won’t protest you.
Steve D.[/quote]
Steve, If you can accept a third place throphy with a 410 gear and not DQ yourself, I would say you shouldn’t EVER protest anyone for anything.
Gasman -
I did dq myself. If you would like a copy of my emails to Chuck asking him to DQ me and recalculate points, my apology email to Geegar in case I screwed up his 6th place finish in the points, my offer to buy the PFC brake pads for the rightful winner, etc., I’d be happy to send them. You need to sign up for a sprint race so you can lose fair and square and get over it.
Steve D.
Scott, sorry about the hijack.
Steve, I looked at mylaps, they must not have received your letter requesting a DQ. I’m just guessing, but I bet Jim would take a late entry for one more car tomorrow.
I spent the morning putting my head back on. Fortunately I had a spare headgasket, and I now use reusable head bolts. Team Gritzer will be in the enduro tomorrow.
I’m not going to say this is an apples to apples comparison, but we recently had a protest / timing and scoring issue on the enduros from Barber.
The ‘official’ points thread on the nasa-se forum is correct now, but MyLaps is still incorrect.
My ‘guess’ is that since Timing and Scoring is a different department than the class points / leaders that these things aren’t always (ie ever) kept in synch.
I’m also not holding my breath for a trophy from the BMP enduro that we won.
So Steve D- even though he is a dirty cheater - can at least ‘claim’ that he has done the right things and in this case the evidence might not be there to support it, at least if My Laps is the definitive source.
If anyone cares to look at the 2008 season points (available on the NASA-SE site) SteveD has no points from last year, ie. his 3rd in the December RA was struck out. It is entirely possible for mylaps and season points to not always agree, because they are managed separately. Usually they do, but oversights can happen.