push rods
Thread Starter
Drifting
Joined: Aug 2006
Posts: 1,726
Likes: 190
From: Scottsdale Arizona
push rods
I am about to install my pushrods and I discovered one end has a larger hole than the other. When I took them out I keep them in order of the cylinder that they came. The way I have them does the big hole go to the rocker.
Thread Starter
Drifting
Joined: Aug 2006
Posts: 1,726
Likes: 190
From: Scottsdale Arizona
Apparently I have only one pushrod with a small hole on one end and a larger hole on the other end.
Race Director
Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
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My gut tells me that one is worn on the end and the hole is larger because the tip is worn down. How does that rocker look?
JIM
JIM
Thread Starter
Drifting
Joined: Aug 2006
Posts: 1,726
Likes: 190
From: Scottsdale Arizona
All of the pushrods have the same size hole but one it was kind of weird. I looked a little bit closer and there was a chip also. I am installing roller rockers in new aluminum heads.
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
I always put the larger hole at the rocker arm end. The small hole is always in line with the lifter, allowing constant oil feed. The rotation of the rocker arm would partially block the oil flow out of the push rod thru the small hole.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
New alum heads and roller rockers? Yea good u caught the p-rod flaw. U will need hardened p-rods for the guide plates and need to fit them up also. U dont want them to rub but just a smooth movement/clearance in the guide plate slot. Also clearance the rocker arms to the vlv spring retainer and the stud itself. Look up crane cams or comp cams for this info/clearance. Myself w/new heads i would use a "checker tool" to measure for correct p-rod length.
Hope this can help.
Hope this can help.
Thread Starter
Drifting
Joined: Aug 2006
Posts: 1,726
Likes: 190
From: Scottsdale Arizona
New alum heads and roller rockers? Yea good u caught the p-rod flaw. U will need hardened p-rods for the guide plates and need to fit them up also. U dont want them to rub but just a smooth movement/clearance in the guide plate slot. Also clearance the rocker arms to the vlv spring retainer and the stud itself. Look up crane cams or comp cams for this info/clearance. Myself w/new heads i would use a "checker tool" to measure for correct p-rod length.
Hope this can help.
Hope this can help.
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Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
If you have any question on the pushrods as far as the way they look.....throw them out and get new ones......
For guide plate.....you will need a hardened pushrod as already stated.
Trend makes 90% of the pushrods in any Cam catalog.....
http://trendperform.com/c-1149647-push-rods.html
Now is a good time to check geometry as well.....
http://www.speedwaymotors.com/Manley...-Stud,536.html
This is not the end all do all tool....but it will tell you if you are in the ballpark.
7.800 is stock length....but I have seen them anywhere from 7.700 to 7.900 on 23 degree stuff (stock).
Not preaching here...just go the extra effort here and be done with it....
Good Luck
Jebby
For guide plate.....you will need a hardened pushrod as already stated.
Trend makes 90% of the pushrods in any Cam catalog.....
http://trendperform.com/c-1149647-push-rods.html
Now is a good time to check geometry as well.....
http://www.speedwaymotors.com/Manley...-Stud,536.html
This is not the end all do all tool....but it will tell you if you are in the ballpark.
7.800 is stock length....but I have seen them anywhere from 7.700 to 7.900 on 23 degree stuff (stock).
Not preaching here...just go the extra effort here and be done with it....
Good Luck
Jebby
Le Mans Master
Joined: Oct 2010
Posts: 6,900
Likes: 833
From: melbourne florida
2023 C3 of the Year Finalist - Modified
I agree with checking the length and installing new pushrods. It's just cheap Insurance. Having guideplates makes hardened pushrods a necessity, other wise you will soon have metal shavings floating through your oil.