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Old 02-22-2005, 12:20 AM   #1
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Do I need hardened pushrods?

I have guideplates with 1.6" roller rockers. Also, what size? Thanks.
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Old 02-22-2005, 12:27 AM   #2
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Car: 86Z/92 RS Camaro
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Yes if you are using guideplates. No if you are using S/A rockers but I would still get them. 5/16 are the diameter size (stock).
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Old 02-22-2005, 12:29 AM   #3
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Unless you've gone to a big roller cam with heavy valve springs, 5/16" pushrods will be fine. Any brand with a .080" wall thickness will do but I suggest using Comp Cams pushrods. You'll also need to buy one of their pushrod length checkers to know the exact length of the pushrods before buying any. Many times stock length is fine but if you've done a cam or head swap, the pushrod length needs to be checked.
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Old 02-22-2005, 12:32 AM   #4
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With guideplates and/or a higher lift cam, yes. If you're using stock heads you should be able to use the stock length, or if you're replacing a setup that is already proven to have correct geometry buy the same length. Otherwise use a pushrod checker to determine what length you need. Be aware that you can't use self-aligning rockers with guideplates, if you weren't aware of that already. I bought the Trick Flow hardened pushrods after bending some stock replacement ones and had no problems since.
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Old 02-22-2005, 12:33 AM   #5
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Quote:
Originally posted by Stephen 87 IROC
Unless you've gone to a big roller cam with heavy valve springs, 5/16" pushrods will be fine. Any brand with a .080" wall thickness will do but I suggest using Comp Cams pushrods. You'll also need to buy one of their pushrod length checkers to know the exact length of the pushrods before buying any. Many times stock length is fine but if you've done a cam or head swap, the pushrod length needs to be checked.
Summit part CCA-7812-12?

How do I tell if the pushrods I have are hardened? Any way? I don't remember what he said- package deal didn't really care about them at the time. I have non SA rockers and guideplates.
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Old 02-22-2005, 01:22 AM   #6
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Take a file to them, if it grinds into it, their not hardened.
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Old 02-22-2005, 01:23 AM   #7
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Quote:
Originally posted by pasky
Take a file to them, if it grinds into it, their not hardened.
I don't have a file
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Old 02-22-2005, 01:24 AM   #8
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can i attempt to scrape it on the side of the head?
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Old 02-22-2005, 01:42 AM   #9
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Tell me the differance between the push rod running through a guide plate and the stock pushrod holes in some heads. I think most pushrods are "hardened". I would be more concerned about getting the geometry right.
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Old 02-22-2005, 02:30 AM   #10
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Quote:
Originally posted by Token
can i attempt to scrape it on the side of the head?
Just pick up a cheapo $1 file . Don't have like toe nail cutters with a file or something? Wife who does her nails? Im willing to bet your pushrods aren't hardened.
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Old 02-22-2005, 07:11 AM   #11
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Car: 1992 Firebird
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Quote:
Originally posted by pasky
Just pick up a cheapo $1 file . Don't have like toe nail cutters with a file or something? Wife who does her nails? Im willing to bet your pushrods aren't hardened.
I tried my best to scratch or scuff them with a nail file, running it against the side of the head, and even a car key and there are no abrasions. My buddy included them when I bought the heads, so I'll assume they're there for a reason.
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Old 02-22-2005, 07:11 AM
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