keeney
Poster
Posts: 82
Reg: 08-11-10
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11-20-23 07:36 PM - Post#2864314
Hey guys, I have a 327 with the old style "double hump" heads that were redone, valves, guides etc. I have one rocker that slides off the valve stem and the push rod was bent. Changed the rocker and push rod then drove it and checked it again. It was still slipping off the valve stem. My question is two fold. 1. What's the probable cause and 2. Is self aligning rockers a possible fix? I say possible fix because I was told they can interfere with the valve retainers. Hard to believe since so many are used. Also, the stud looks straight. Anyone else had this problem?
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bobb
Super Senior Member
Posts: 6461
Loc: paradise
Reg: 09-05-03
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11-21-23 07:10 AM - Post#2864324
In response to keeney
i would check to sure the valve is not hitting the piston. i had a guy come in with a stock jeep six banger and it had a bent pushrod. how i dodono.
| 70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails. |
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keeney
Poster
Posts: 82
Reg: 08-11-10
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11-21-23 01:47 PM - Post#2864336
In response to bobb
Thanks bobb for responding. I've driven it since this happened and it ran fine (after replacing the pushrod) but when I checked the rocker again it had slipped slightly sideways again. No apparent damage to the valve except for a little burring on the stem.
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 turbo38s10
"12th Year" Gold Supporting Member
Posts: 2140
Loc: Agawam,MA
Reg: 09-17-09
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11-22-23 01:26 PM - Post#2864369
In response to keeney
Did you replace the ball as well? Is the rocker stud bent?
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keeney
Poster
Posts: 82
Reg: 08-11-10
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11-22-23 06:58 PM - Post#2864390
In response to turbo38s10
Yes I replaced the ball also turbo. Now I'm measuring and looking at the stud. I can't tell for sure visually if it's bent but I did see a scratched area on the side of the stud. Do you think self aligning rockers will solve it? Anything short of pulling the stud I'm willing to try.
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55Brodie
Contributor
Posts: 444
Age: 71
Loc: Little River, SC
Reg: 12-26-15
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11-22-23 08:32 PM - Post#2864391
In response to keeney
The stock ball and rocker is self aligning to some degree so I'm not sure what you are referring to.
I would check if your valve stem is bent. Also, you stated the rocker stud is straight, but are they all the same height? I've had stock studs pull loose on my old 327 solid lifter engine.
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bobb
Super Senior Member
Posts: 6461
Loc: paradise
Reg: 09-05-03
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11-23-23 09:52 AM - Post#2864420
In response to keeney
the hole in the head that the pushrod goes through acts as a guideplate. if the valve tip is not flat it can screw up the alignment.
| 70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails. |
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Don57
"18th Year" Silver Supporting Member
Posts: 1431
Age: 73
Loc: Illinois
Reg: 04-28-00
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11-24-23 11:16 AM - Post#2864459
In response to keeney
Swap the rocker and ball to a different location and see if the problem follows.
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keeney
Poster
Posts: 82
Reg: 08-11-10
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11-30-23 06:17 PM - Post#2864653
In response to Don57
Yep I swapped rockers and test drove it. I pulled the valve cover and the rocker had started to move already. Thanks for your input. I actually decided to pull the head and take it to a shop. Frustrating but I didn't want to just band aid it. Thanks all for your input!
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