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Crank pulley

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Crank pulley #1
cooke Martin Cooke Old Saybrook, CT, USA Sign in to contact	Topic Creator (OP) Apr 20, 2024 05:47 PM Joined 10 years ago 214 Posts

I bought a MOSS 433-697 crank pulley for my 67 GT but not sure what timing marks to use. It has marks at 28 degrees and 180 degrees. My timing marks on the timing cover are on the bottom.
Thanks

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Re: Crank pulley #2
Basil Adams About 12 miles from Sears Point, CA, USA Sign in to contact	Apr 20, 2024 05:59 PM Top Contributor Joined 17 years ago 12,287 Posts

Nake your own mark by finding TDC with a piston stop. A 14mm x 1.50 bolt where the #1 sperk plug goes. Turn crank until both valves are closed and the piston touches the bolt. Mark your pulley and timing cover. Then turn the engine the opposite way until the piston again hits the bolt and mark the pulley and the timing cover. TDC is half way between your 2 marks and each tooth on your cover is 5° (I think - maybe 10°) Mark the cover 10° before TDC and set timing to 10° before TDC. You're done :-) Basil 707.762.0974 basiladams@yahoo.com

Basil C. Adams
1956 MGA Coupe (Show Car)
1957 MGA Roadster (Driver)
1958 MGA Coupe (Racecar)
1959 MGA Coupe (unrestored)
1960 MGA Coupe (unrestored)
1960 MGA Roadster (Driver)
MKIII Elva Courier (E1056)
1967 427 Cobra
1972 Alfa Romeo Montreal
A coupla late MGBs
1960 Austin Healy BN7
More Cars than Brains

Edited 1 time(s). Last edit at 2024-04-20 05:59 PM by Basil Adams.

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Re: Crank pulley #3
SilasW Silas Kinsey Canterbury, CT, USA Sign in to contact 1966 MG MGB GT	Apr 20, 2024 06:21 PM Top Contributor Joined 4 years ago 1,228 Posts

Martin,

I would assume the pulley is for either top or bottom pointer location. When you get the engine assembled to where you can mount the pulley, turn the crank to where no.1 and no.4 pistons are at TDC and the notch at the bottom is the one to use.

Silas

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Re: Crank pulley #4
ghnl Eric Russell Mebane, NC, USA Sign in to contact 1961 MG MGA "Calvin"	Apr 20, 2024 06:35 PM Top Contributor Joined 12 years ago 12,810 Posts

https://mossmotors.com/media/instructions/433-696.pdf

Quote: A new pulley with vibration damper (5 1/8” in diameter) was introduced in 1964 as 12H963,
and this was used through 1970. The timing mark on these pulleys lined up with the pointer on the
early timing cover, which was at the bottom, and visible only from under the car.

A second pulley with vibration damper was used from 1971 through 74. This pulley, 12H3515, was
also 5 1/8” in diameter. The timing mark on this pulley lined up with the pointer on the later timing
cover, which was at the top- much easier to see. The two pulleys essentially differed only in the
location of the timing mark or groove.

The new pulley we have made has both sets of timing marks, making it suitable for any MGB 62-
74.

Eric Russell ~ Mebane, NC
1961 MGA #61, 1981 Alfa Romeo GTV6, 1984 Alfa Romeo Spider, 1991 Honda ST1100

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Re: Crank pulley #5
riley1489 Bruce H Great White North, QC, Canada Sign in to contact 1953 Jaguar XK120 1959 Riley 1.5 "King George" 1973 MG MGB	Apr 21, 2024 07:52 AM Top Contributor Joined 12 years ago 26,335 Posts

figue it out

B

Life's most persistent and urgent question is, "What are you doing for others?"

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