Engine: Late Valve timing mystery

[5brown1]

I have gone through several attempts to get the Golden Hawk running as it should including replacing the intake manifold gasket, rebuilding the carb, setting the valve lash, separating the 5 and 7 plug wires and attempting to adjust the timing various ways.
I spoke with Ingvar Vik who informed me that the procedure for checking valve timing was in the service manual. I performed the test twice with the same result each time.
Valve timing is not correct. The timing pointer was about 3/4 inch from the line at the IN.OP. on the damper. When the timing is correct the line should be directly under the pointer. So I opened it up to see if the gear was off. The pictures show what I found.
There are two "o's" stamped on the gear and as you can see the smaller one is in the wrong spot. Could someone have added the larger "O" and put it on the wrong side?

[TWChamp]

I think you are right. The cam gear is 52 tooth, so advancing it one tooth would be about 15 degrees on the crankshaft.

[Dwain G.]

When the cam and crank gear marks are aligned, cylinders #1 and #6 should be at top center, so the timing pointer should be at UDC, not IN-OP.

[StudeRich]

OK, I got it!
My identical NOS 1685777 Aluminum Cam Gear has it's Timing Mark on that tooth just to the Left of Center on the cone shaped reinforcement hump just Left of the one at the Top with the Hole.

Saying it a different way: the Marked Tooth is the 6th. Tooth Left of the Straight UP center Tooth in the center of the Hump with the Hole at the Top.

I lined my Gear up with the puller holes at 3:00 and 9:00, and the Cam Plate Screw excess holes at 12:00 & 6:00 JUST like yours, and found the Mark WAY off from yours!

The Casting Number is at about 7:00 and 180 degrees across, the "Alcoa" Stamp also matches your location.

About the ONLY thing I can't match to your Gear is the Keyway slot location, as yours is not visible.
A Centerline through the Keyway across the Gear, is very close to 1/2 a Tooth Counterclockwise of the Timing Mark.

I also checked a New Reproduction Aluminum Cam Gear from Stock and a New Fiber Gear, they ALL match, so this NOS one must be correct.

Trust me, I would not mislead you in retaliation for Welshing on our deal with deposit, to purchase my '54 Land Cruiser a few years ago!

[doofus]

I would bet that gear was "Red Tagged" at factory but never destroyed. it's a dud and was bought up in a pile of like parts and re/sold later. have seen boxes of factory "Dud's" being re/sold at meets.a new cam gear will fix this but compare them first,replacement is a bummer. Luck Doofus

[Mrs K Corbin]

why can't you just "Clock" it, re-mark it appropriately and let-er ride?

[5brown1]

When the cam and crank gear marks are aligned, cylinders #1 and #6 should be at top center, so the timing pointer should be at UDC, not IN-OP.

Check your service manual on how the valve timing test is done.

[5brown1]

OK, I got it!

Trust me, I would not mislead you in retaliation for Welshing on our deal with deposit, to purchase my '54 Land Cruiser a few years ago!

Hey, you must be thinking of someone else. I have never had any desire to own a Land Cruiser.
And I certainly do not need anyone else misleading me on car stuff.

[TWChamp]

why can't you just "Clock" it, re-mark it appropriately and let-er ride?

Exactly!
No need to throw out an otherwise good timing gear.

[rkapteyn]

The 6 Cylinder aluminum gear looks identical but is clocked differently.

Robert Kapteyn

[StudeRich]

Hey, you must be thinking of someone else. I have never had any desire to own a Land Cruiser.
And I certainly do not need anyone else misleading me on car stuff.

Must be another Brown in the Carolina's, sorry.
Well I told you how to remark your Cam Gear, after 1 1/2 Hours of research, so do what you will, have a good Day.

The 6 Cylinder aluminum gear looks identical but is clocked differently.
Robert Kapteyn

Correct, but, if I recall correctly, the Aluminum H.D. 6 Cyl. Gear has wider Teeth, so they have to be machined down to use as a V8 Gear, usually noticeable when SASCO did that.

[jpepper]

Put a degree wheel on it and degree the cam. The first task is to verify TDC. Many times the damper plate and/or the rubbel insulator is installed wrong so all the marks are off.
With the degree wheel at accurate TDC check cam timing. I believe factory timing events are at .020" lifter rise. Check the shop manual in the specifications section for the information. You may need to just move a tooth or you may need a new keyway broached. A push broach can be used. Most machine shops have them.

Jim

[swvalcon]

I wonder if someone was trying to find a way to advance the cam? I know on a small block chev with a single tooth chain if you take the crank gear and count the number of teeth from the key way to the timing mark and then turn the gear over and count the same number of teeth from the key way and make your own mark there and put the gear on backwards using that mark you have advanced the cam about 2 degrees.

[5brown1]

[QUOTE=StudeRich;1011916]Must be another Brown in the Carolina's, sorry.
Well I told you how to remark your Cam Gear, after 1 1/2 Hours of research, so do what you will, have a good Day.

This Brown is from South Dakota not South Carolina.
And Thank you for your help!



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