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Debating oil mods for a 401 |
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AZ_chip
AMC Apprentice Joined: Jun/28/2014 Location: Arizona Status: Offline Points: 40 |
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All great info! I am starting a 401 rebuild myself. I saw the adjustable oil relief spring idea elsewhere. Maybe here. I read somewhere the idea of painting the valley with a product called Glyptol. Any thoughts on that?
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1981 Jeep Cherokee
AMC 360 Holley Sniper |
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Personally I do not like the idea of coating anything inside of an engine.
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Gremlin Dreams
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mixed up
AMC Addicted Joined: Jun/16/2015 Location: Monroe mich Status: Offline Points: 2178 |
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I have seen lifter valley painted but im with boris not a fan possibility of it flaking always crosses my mind but one thing that can be done is to smooth the vally to promote drain back
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69 amx 290 auto
65 220 290 4spd 80 ford fairmont |
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gtoman_us
Moderator Group Joined: Jul/10/2007 Location: E. Nebraska Status: Offline Points: 3871 |
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My 327 came with the Red Glyptol from the factory with no signs of flaking or chipping.
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Moderator - Emeritus
Used to collect trophies, now I collect gas receipts and put on miles 1964 Rambler Ambassador Cross Country Wagon 1965 GTO 1931 Model A original survivor "Flat Roofs are Cool" |
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pit crew
Supporter of TheAMCForum Joined: Jul/08/2007 Location: delete Status: Offline Points: 5341 |
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Glyptol and other types of coatings have been used for many years both on and off the track. Even AMC used it on "factory" engines in the Rambler days. It is like any other product that someone might use. Done it right all is fine. Screw up and you pay the price. Don't blame the product, blame whomever did not follow the proper procedures, instructions, or recommendations.
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73 Hornet - 401EFI - THM400 - Twin Grip 20 |
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dbomb
AMC Addicted Joined: Jul/22/2012 Location: new jersey Status: Offline Points: 705 |
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cam bearing oil holes are huge in this motor bleed off a lot that can starve other areas and you can put a restrictor in line to the lifter bores if needed without bushing the bores cam bearings can be reclocked upon installation and re drilled smaller like .070 I like to do this instead of running internal line or restricted pushrods I've never run an internal line actually is make sure you're crank is drilled right and that supply to rear main is drilled and put that little nut on the oil pickup to space away from pan Some other brand engines have little plastic button on oil pickup but not amcs. 6 quarts
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rebuiling 73 amx need parts
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jcisworthy
AMC Addicted Joined: Jul/23/2009 Location: North Carolina Status: Offline Points: 2805 |
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Bleed off is a function of clearance not the size of the feed hole.
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Specializing in dyno services, engine building, and cylinder head porting
rbjracing.com Phone Number 518-915-3203 |
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dbomb
AMC Addicted Joined: Jul/22/2012 Location: new jersey Status: Offline Points: 705 |
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True Jc but they are much larger than many others I've installed
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rebuiling 73 amx need parts
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dbomb
AMC Addicted Joined: Jul/22/2012 Location: new jersey Status: Offline Points: 705 |
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Probly non issue for him anyway
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rebuiling 73 amx need parts
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Red Devil
AMC Addicted Joined: Jul/10/2007 Location: Canada Status: Offline Points: 1743 |
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... maybe some years don't, but the few I've taken apart do have a plastic button. |
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