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By Ryguy442 - 8 Years Ago
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Hey guys I have a 1956 mercury metalist with a 312 in it. It ran good for awhile but I took it off the road for a t5 swap. And long story short it sat for 3 years. I got it started the other day. It's not running great, I know I want to change the pushrods because the driver rearmost pushrods is bent. Anybody know where I can get them? I just want to make sure I get the right ones. Any info helps thanks!!
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By paul2748 - 8 Years Ago
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John Mummert should have them
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By slumlord444 - 8 Years Ago
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As I recall the '56 used the skinny pushrods. Later model were heavy duty and thicker. That's what Mummert would have and there are other sources.
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By miker - 8 Years Ago
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A bent pushrods on a stored engine is probably a stuck valve, possibly the rocker arm. You might address that before you replace it, you really don't want to damage the cam or lifter.
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By Ryguy442 - 8 Years Ago
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Actually that pushrod was bent back when I had it running awhile ago. Just never got around to replacing it.
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By Lou - 8 Years Ago
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I have 16 nos Y-Block "Sealed Power" made in USA HD type push rods #RP-3022 , $45.00 including shipping. ....vehicleone@hotmail.com.
.....Lou
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By Ryguy442 - 8 Years Ago
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What length are the nos ones mine are 8.125
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By Lou - 8 Years Ago
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8 1/8 overall.
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By 57RancheroJim - 8 Years Ago
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Lou, if RYGUY doesn't want them I'll take them..
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By GREENBIRD56 - 8 Years Ago
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I think the last ones I bought I got from Rock Auto...... were these RP3022. Charlie got some from a source and the pockets had some defect?????
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By charliemccraney - 8 Years Ago
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There was a batch of pushrods a long time ago that had cups which were too small. If that was not realized, and they were installed then they would break or accelerate wear. Always check before assembly.
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By 57RancheroJim - 8 Years Ago
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Thanks Charlie that good to know. I had a similar problem with some FE push rods years ago.
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By Lou - 8 Years Ago
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How do you tell the good ones from the bad ones?
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By 57RancheroJim - 8 Years Ago
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I think it would require a radius gauge to check. If I remember correctly on the FE problem the radius of the bottom of the cup was smaller then the ball on the adjuster and that caused the cup to spit.
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By charliemccraney - 8 Years Ago
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A rocker arm adjuster screw - the poor mans radius gauge. If you have a Y-Block, then you have the tool.
I think I've seen spray graphite used as a way to observe the contact pattern. Maybe Dyken or a really thick grease would also work.
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By 57RancheroJim - 8 Years Ago
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Dyken was my after thought. Maybe just paint would work?
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By Genuinerod - 8 Years Ago
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Don't make it so hard, just use a sharpie to mark the socket of the push rod, rub it on the rocker arm ball and you will see the highs and lows. If there is any.
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By PF Arcand - 8 Years Ago
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John Mummert wrote an article titled Random Thoughts, re pushrod compatibility in Y-Block magazine issue #137, Nov/Dec 2016, He included several other trouble areas re transmisson conversions,( T-5 transmissions have snouts that must be trimmed back to fit Y-Blk cranks & 57-58 distributors that have to much centrifical advance built in) etc. Briefly, Ford engineers made the pushrod balls .360" & the cup .375" for about 0.015" clearance for oiling. The aftermarket made the ball .375" & the cup .390. Therefore, if a performance screw is used with a Ford .375" cup, there is insufficient clearance for oiling resulting in high wear & likely failure. Further there are some defective alloy aftermarket adjusting screws out there that fail in short order.. That issue is well worth obtaining for that article alone..
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By Sandbird - 8 Years Ago
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Ryguy442 (7/27/2017)
Hey guys I have a 1956 mercury metalist with a 312 in it. It ran good for awhile but I took it off the road for a t5 swap. And long story short it sat for 3 years. I got it started the other day. It's not running great, I know I want to change the pushrods because the driver rearmost pushrods is bent. Anybody know where I can get them? I just want to make sure I get the right ones. Any info helps thanks!!
For what it's worth I have seen more than once where too long a bolt was used in the last hole back by the intake manifold driver's side that holds the clip for the temp sensor wire. The threaded hole in the head is open all the way through to the pushrod area right in line with the pushrod allowing the bolt to hit the pushrod and bend it.
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By aussiebill - 8 Years Ago
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ding amiker (7/28/2017)
A bent pushrods on a stored engine is probably a stuck valve, possibly the rocker arm. You might address that before you replace it, you really don't want to damage the cam or lifter.
miker, so right! they have a reason for bending and wise advice.
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