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Topics - Coubra

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FE Technical Forum / Distributor Gear Roll Pin Broke
« on: May 23, 2022, 09:09:20 PM »
Took our '69 Shelby to Road America for the Optima event this weekend.  The car (and I) have a lot of sorting out to do, but the big problem was a broken distributor gear roll pin.  Using a Precision Oil Pumps blueprinted HV oil pump/billet driveshaft and Edelbrock (think MSD) Pro Flo 4 distributor with their gear/roll pin. Not running lots of oil pressure with a Canton remote filter and Mishimoto cooler (thinking about installing the high pressure spring kit).  Going to put the MSD 85813 gear on the distributor (Comp roller hydraulic cam with Morel 8591 lifters)

Question 1: Is the distributor gear supposed to make contact with the block? 
Question 2: Is there a procedure to make sure the bottom of the gear is a specific distance from the point where the distributor housing makes contact with the block to the bottom of the gear?
Question 3: Should the new gear/distributor shaft be drilled out for a larger roll pin?
Anything else?

For what it's worth, the engine pulled very nicely (thanks for the great job on the heads Barry) and I look forward to getting it on the track again.  Yeah, we were the only FE there...

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FE Technical Forum / Rear Main Seal Leak
« on: July 31, 2021, 07:49:20 PM »
Installed "new" 428 block with Scat 4.25" stroke & stock bore in our '69.  1st run had some minor issues and oil leaking from rear of block.  Resolved issues, ran again with same leak that somehow, didn't fix itself...
Read all the other threads on rear main seal problems/install - good stuff.
Dropped K-member, suspended engine, and changed seal.  Original & replacement seal is Fel-Pro BS30138.  Was a little concerned when the new seal rotated easily into the block (crankshaft doesn't have sipes machined in seal surface area).  Did 3/8" seal rotation, put dabs of Permatex Optimum gasket maker on the end of the seal, and put small amounts on cap corners along with a few dollops in the side seal runs close to the block/cap intersection.  Installed cap without the side seals and torqued.  Sanded side seals, coated with gasket maker, applied a couple dollops to the side seal runs, then pushed the seal in until it wouldn't go any further and pushed out excess gasket maker - didn't use nails.  Trimmed side seals, spread some gasket maker on the inside cap/block seams, bolted up windage tray/oil pan (the bearing vent is exposed), reassembled engine/K-member, and let stand for 24 hours.  Cranked it up yesterday and it's got the same freakin' leak.  PCV valve is pulling air while running with 10" vacuum.  Ran it again today with UV dye in oil.
New plan: Drop the trans (TKO 600), take off bell housing, and check behind block plate to make sure the plugs and cam plug aren't leaking.  Assuming they're okay, then drop the K-member and pan again to retry seal.
Questions:
1) Is there a better seal out there?
2) Didn't put gasket maker on the seal where it contacts the block cap. Should I put a thin coating on the portion going into the cap? 
3) How will I get gasket maker on the portion rotated into the block without contaminating the surface of the crankshaft?
4) Plan on doing the same thing with the cap and side seals.  Should that change?
5) Thinking about changing to Permatex's Anaerobic gasket maker.  Anybody have any experience with this stuff?
Any help will be appreciated.

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FE Technical Forum / Build Literature
« on: August 03, 2020, 05:18:07 PM »
June was a tough month.  Finally got our GT500 on the track (Blackhawk Farms) and proceeded to blow it up - and I have no intention of repeating this disaster.

Are there any recent publications on best build/construction practices for FEs?

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