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Occasional loud clunk and stop when cranking |
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Moffman
AMC Nut Joined: Sep/28/2011 Location: New Jersey Status: Offline Points: 287 |
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Posted: Oct/23/2017 at 2:34pm |
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Got an odd issue on a freshly built 360/727 in a '71 Javelin. Changes from stock that could affect it include a powermaster xs starter, msd ignition, 11 in 2400 stall TCI converter.
Occasionally when cranking over it almost seems like it catches something and stops. Usually only when it's cold. It will crank again fine after but it is concerning. My first guess would be something with the aftermarket starter. I roughly measured the engagement of the starter pinion and it looked good, the ring gear teeth look fine as of right now. On an unrelated note, it's a female canine to start hot and not a big fan of the cold (I have an airgap intake though). I haven't touched the timing since I broke it in and I think it's got a bit too much advance in it. Need to dial in the pilot screws as well and that should help. Lastly, are these saginaw power steering pumps made to leak? Cause oddly mine came with a dipstick on top but it seems like the engineers designed the fluid level to be checked by leaks. I'm on my second remanufactured one, first one's body was crooked over the mounting stud hole and leaked pretty good. I transferred everything over to my "new" one, seemed dry at first and I began to celebrate by bleeding the system. Then I see a nice little puddle from the steering box, pump still dry so I still content. Next day I look under the pump and see a nice little dribble. You guys using sealant on the mounting studs? I'm hesitant to. The high pressure fitting seems dry and it's the flared seal kind not o ring. I'm just sick of leaving power steering puddles wherever I go. Edited by Moffman - Oct/26/2017 at 8:30am |
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limachine
AMC Apprentice Joined: Apr/02/2009 Location: Long Island Status: Offline Points: 151 |
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First the power steering pump. Whenever I swap reservoirs, I use ultra grey on the o-rings and around the studs. Anything that can possibly leak gets sealer. Just a little, you don't want too much so it causes other problems. If the pump is leaking from the shaft then the rebuild is no good. A leak from a fitting is usually the o ring. Make sure you coat that o ring with a drip of power steering fluid. Flared types will leak if the seat is worn.
I'm not a fan of the power master starters. I've put in a lot of hi torque starters, recently used a few Msd starters on some Fords. They seem to work well. I stopped using pm after installing one for a friend which wiped out a flywheel on a 66 vette. Pulled my hair out checking myself on everything then called tech. Turns out a batch of solenoids were no good, it would drop in and out while cranking, throwing the starter drive at random. They sent me an update kit which was a solenoid and shim pack. Big deal. I still had to drop the flywheel. I'd say pull your inspection cover down and make sure none of your converter bolts are hitting. Take a good look, turn the engine by hand, pull the plugs if needed. Don't run it like that. |
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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The "something" it catches on is likely an early ignition
sending a piston back down while climbing. In other words, too much ignition lead at start. |
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Gremlin Dreams
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xfactor
AMC Nut Joined: Sep/09/2012 Location: Port McNeill BC Status: Offline Points: 478 |
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I just had that happen to my power master starter .Turns out the two allen head locking bolt for clocking the starter were lose
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Ray Harper 69 AMX 401
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Moffman
AMC Nut Joined: Sep/28/2011 Location: New Jersey Status: Offline Points: 287 |
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The pump seemed dry at first but it looks like a mild leak developed from one of the mounting studs. I hate using RTV when not needed but it looks like a little on the threads wouldn't hurt. The inspection cover is off and it's not an issue of the converter bolts or anything. That was my main fear.
It definitely has symptoms of too much advance but I would think that would make it harder to crank but not completely stop it, no?
Thanks all |
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Boris Badanov
AMC Addicted Joined: Dec/14/2013 Location: NH USA Status: Offline Points: 4209 |
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Having learned the old hard way about too much advance
I have run into the "sudden stop" a few times. |
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Gremlin Dreams
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