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Mandatory oil system mods |
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Page <1 23456 7> |
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JolleyGreenSST 
AMC Apprentice 
Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
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 Posted: Jan/28/2019 at 2:57pm |
Thanks for the reply Rebel Machine! I just checked my new summit camshaft and comp cams timing gear, it seems to be covered enough that I shouldn't have any problems. but hear are some pics to get your opinion... |
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"God is good all the time and all the time God is good!"
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73hornut
AMC Addicted 
Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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Posted: Jan/28/2019 at 6:19pm |
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Make sure the slot also lines up with the oil hole in the cam.
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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Rebel Machine
AMC Addicted
Joined: Jul/03/2007 Location: Western Il Status: Offline Points: 5122 |
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Posted: Jan/28/2019 at 6:21pm |
-Steve- |
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JolleyGreenSST
AMC Apprentice
Joined: Jul/12/2018 Location: High Desert, CA Status: Offline Points: 239 |
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Posted: Jan/28/2019 at 7:03pm |
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Thanks Steve. And yes I lined up the slot with the oil hole or whatever it is called. @73hornut David.
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"God is good all the time and all the time God is good!"
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PHAT69AMX
AMC Addicted
Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Posted: Jan/28/2019 at 8:11pm |
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Previous thread with Cam Snout Stack Oiling Drawing and info: revised 09-04-19 - "opinions" added, drain-back. Lifter Orifice revised 08-28-19 - add above link revised 02-07-19 revised 02-17-19 revised 04-21-19 revised 07-30-19 Just a middle aged hobbyist Hot Rodder guy. Had a '69 AMX from 1985 to 2014. Paid shop to do 1st motor rebuild. Self-assembled the next three. Web active since about 1995. Not my ideas, those of many others. Collected many little "Oil" things that can be done. Mandatory? Doubtful. Helpful? Maybe. In no way an endorsement, just a compilation. Quite a bit here really once all typed up. Sure there are more, will edit / add as needed. Kinda 2 categories: - Do things to what is already there - Add, change, replace things AMC V8 Oil System Checks and Modifications Debated for Decades: - Extra Lifter Valley Oil Line, considered "Preference" - Alternative, ? same but different ?, a 180 degree piece of steel line plumbed between the (2) 3/8 pipe Plugs in the Lifter Oil Galleys on the back side of the Block. Requires a small block rib clearance notch for steel tube. Obvious: _ AMC Oil Pump has -NO PROBLEM- with Volume (Pump Gear Length) * Must Keep SUMP FULL *, "Pan", so Drainback... - Cam, Crank, & Rod Bearing Clearances to AMC SPEC - Pick-Up to Pan Clearance to Spec - Oil Pick-Up Head to Pan Stock PLASTIC Spacer, Secure in place or Replace with 1/4" Bolt or equivalent Oil Pump: - Aug 2019 - has been reported MISSING "Vent" HOLE(s) in Pump Cover Gaskets - Deburr New Pump Gears and SHAFT SLOT to prevent any damage to shaft hole in Timing Cover - Temporary Assemble New Oil Pump Gear and Actual Distributor that will be used for Final Assembly w/o Drive Gear to Confirm NO BINDING between Pump Gear Shaft Slot & Distributor Shaft Drive Blade - "Parkman Mod" ? at bottom of Pump Gear Pocket for "anti-surge" - enlarge / port match Round Outlet Hole in pump cavity pocket - use late angled cover rather than early 90 cover - block off filter bypass, or new cover with out - change threaded filter Adapter for one that fits larger later filter - inspect Pressure Relief Plunger Passage for finish and size - soften / blend oil passage intersection corners where possible - ? there is a Mod that moves Bypass Plunger Bleed Oil passage or something - ? "Do" the AMC V8 Oil Pump Pressure Relief Bypass Plunger Circuit Vent Modification, see pictures further down in this thread... - ? Fabricate an Adjustable Spring Tension Oil Pressure ByPass Plunger Cavity "Cap" OIL PAN: - ? Run approx 1 extra Quart, more than 5, less than 6 - ? Aftermarket larger Aviad oil pan, but significant cost - ? Crank Scraper / Windage Tray Block: - port match Block Front Ports to Gasket / Timing Cover - confirm / clean drilled passage from pump up to top center oil galley - blend / soften internal oil galley intersection corners where possible - 3/8 Pipe Plug - SHALLOW, Pass Side Front of Block - confirm full drill through Main Saddles up to Lifter Galley - inspect oil pan rail suction passage - Pick-Up, confirm no galley obstruction once screwed into pan rail - ? add ~1/8 oil drain holes in lifter valley, or others ? - ? Chamfer / Blend 2 Front Oil Drain Holes ? - ? Restrictor ? Font of Drivers Side Lifter Oil Galley Passage Behind external visible Driver's Side 3/8 Pipe Plug, Tap Block & Install 2nd Pipe Plug with small drilled Hole - ? Added external Oil Line & Fittings, back of Block, connecting the two Lifter Oil Galley passages that are Plugged Stock - ? "Drastic" somehow Drill DRIVER SIDE Lifter Oil Galley to Oil CAM BEARINGS from that side and install Cam Bearings with Oil Hole on the Drivers Side. Then MAINS are Passenger Side Oiled and Cam from Drivers. - ? "Drastic" BEHIND the Block Front Drivers Side 3/8 Pipe Plug for the Lifter Galley, Tap the INTERNAL Lifter Galley Hole for a Pipe Plug drilled with a "small hole" ? size ? to restrict Oil Flow to the Drivers Side Lifters and "increase" Passenger Side Lifter, Cam, and Main Oiling - Rear Main Bearing ? Brg Clearance Different than other Main Bearings ? Rear Main Seal Knurled Surface ? ? Sealant Longways along Outer Brg Cap to Block Axial Corners - ? 401 AMC Cranks ONLY ? ? #4 Main Main Brg to #5-6 Rod Brg ? OIL PASSAGE *Clocked Location* "incorrect" Different Clocked Location than ALL OTHER AMC Cranks... - "Drastic": External Oil Pump Suction Line required: Added Internal Oil Line from stock Pick-Up Hole ( now an Oil Feed ) to drill and tapped hole in top of #4 Main Bearing Cap Ref: Above 401 Crank Main #4 Oil Passage Drill Location Drainback: OPINION - ONE OF, IF NOT "THE", MOST SIGNIFICANT AREA OF ATTENTION. - deburr / blend lifter valley drain back corners - inspect / blend / ? enlarge ? cylinder head drain back holes - ? Drill additional Drain HOLES in Block Lifter Valley ? Hole Size, Location, and Quantity varies - ? Modify bottom of Timing Cover at Front Bearing Cap "gap" area - ? Traco Mod, ~1/4" Holes drilled through in Cyl Heads between Pushrod Holes *DRAIN OIL* Pumped Up On Top of HEADS - "Drastic", Tapped holes in ends of Heads above level of valve train "floor" but below Valve Cover Gasket Surface & Install/Run 2 or more AN Oil Drainback Lines/Hoses to Oil Pan "Effectively" Drain "Excess" Oil from Top of HEADS to Oil Pan Heads: OPINION - LIFTER OIL PASSED VOLUME MUST BE "BALANCED" WITH MEAGER DRAIN-BACK PASSAGES. - No umbrella seals, machine valve guides for Perfect Circle Valve Stem Seals Obviously, ensure removal of all disintegrated Umbrella Seal pieces from all areas of engine and parts Cam: - Correct Cam Bearing Installation Oil Hole Size & Location - confirm front snout stack-up oil passages - Cam Sprocket, ? Front Face Slinger Grooves, size and quantity ? - Full Groove front most bearing and/or journal - bleed hole rear most bearing journal - Rear Freeze Plug installed depth Lifters: OPINION - LIFTER INTERNAL OIL METERING DISC RESTRICTOR ORIFICE SIZE IS "CRITICAL" TO PREVENT EXCESSIVE OIL BEING PUMPED UP TO THE HEADS WHICH HAVE MEAGER DRAIN-BACK PASSAGES, CAN FILL WITH OIL AT RPM, AND STARVE THE OIL PAN PICK-UP CAUSING IT TO SUCK AIR. Just what the "correct" Metering Disc Orifice Size is, is yet to be determined. - ? Correct FIT Lifter to Bore, .904 Lifter OD and Lifter Bore ID Lifter OD = .9040"-.9045", Tappet Bore Clearance = .0010"-.0025" 1975 AMC TSM Lifter & Bore Specs - ? Lifter internal design, oil volume passed * LIMIT OIL Pumped Up on Top of Heads... - ? Restrictor Push Rods Rods: - ? Bearing Oil Squirter Notch at Rod / Cap Joint
   Edited by PHAT69AMX - Sep/04/2019 at 3:53pm |
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Jmerican
AMC Addicted
Joined: Mar/29/2016 Location: Seattle, Wa Status: Offline Points: 585 |
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Posted: Jan/29/2019 at 12:25pm |
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yes, this guy. ^
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wheelz
AMC Apprentice
Joined: Jan/29/2019 Location: NJ Status: Offline Points: 101 |
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Posted: Jan/31/2019 at 6:26pm |
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Volume is a larger factor in AMC V8s than pressure. My mods are always to increase and smooth the size of the housing and adapter passages and run external filter lines and a deep Pan to increase volume of the system overall with of course careful attention to crank bearing and adapter clearances but I do no internal oil line mods. . The only real mod I do is to have a small line from the sending unit port to the timing cover to lube the dizzy gear for insurance.My most recent build yielded 65 psi at cold start. On the street I change the relief spring to one I cut a couple coils off and have 50 psi to take some pressure off the gears. I do run restricted smith bros pushrods and edm lifters on a mechanical cam as well. Still have too much oil in the heads but that's not a bad thing with $400 comp cam ultra magnum rockers
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wheelz
AMC Apprentice
Joined: Jan/29/2019 Location: NJ Status: Offline Points: 101 |
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Posted: Feb/07/2019 at 4:47pm |
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I have also used this to adjust oil pressure if there is too much after a new build before starting  |
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73hornut
AMC Addicted
Joined: Jul/03/2007 Location: Southern Oregon Status: Offline Points: 3130 |
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Posted: Feb/07/2019 at 10:47pm |
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71 Javelin
74 Gremlin 79 Spirit AMX Rogue Valley Rumblers Like Us on FB https://www.facebook.com/groups/1602825606650796 |
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69 ambassador 390
Supporter of TheAMCForum 
Joined: Nov/22/2009 Location: Peoria, AZ Status: Offline Points: 3539 |
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Posted: Feb/07/2019 at 11:06pm |
Um, Not! The extra quart is still below the baffle in the stock pan. The oil level is far below the baffle in a running engine and at no time is the crankshaft spinning in the sump oil. A full quart or more is trapped in each cylinder head and another in the lifter galley during higher speeds. This leaves only two in the pan. I have run many engines on my start stand and sometimes use slotted valve covers during valve adjustments on running engines. The oil level during 2000 rpm cam break in is usually an inch or so in the heads and much more at higher speeds. I have NEVER witnessed any foamed oil in the heads of a running engine. But this is with just limited AMC experience. I've only built about a hundred! |
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Steve Brown
Algonac, Mi. 69 Ambassador sst 390 84 Grand Wagoneer 69 Cougar XR7 65 Fairlaine 500XL 79 F-350 Super Camper Special |
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Rebel Machine wrote:
