Valve Job and pushrod length
Thread Starter
Staging Lane
Joined: Aug 2014
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Valve Job and pushrod length I had a valve job done on my heads. Also added a cc503 and scorpion 1.6 SA rockers. Would a valve job push the valve stem up just that much further to need shorter pushrods? I have only found pushrods that come in .050 increments.
Was the can setup up and running with the right length pushrod before the valve job?
If so the valve train is adjustable and will compensate.
This isn't as sensitive as a nonadjustable LS engine
If so the valve train is adjustable and will compensate.
This isn't as sensitive as a nonadjustable LS engine
Thread Starter
Staging Lane
Joined: Aug 2014
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Nope, engine came apart. Got a valve job and just got the the cam and rockers.. It was the cars first ever valve job if that makes a difference. Only 78,000 miles on the motor.
TECH Enthusiast
Joined: Jul 2007
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From: Central,NJ
Typically how ever much the valve gets sunk into the seat is removed from the tip of the valve so it ends up the same length. What will change is the position of the lock groove.
TECH Veteran
Joined: Apr 2008
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OP
it is recommended you "check" PR length when cahngeing cam & valve train parts.
You may very well wind up with the stock 7.200" PR...but the point is "check" first
if you are getting SA RR and the length checks out that stock will work than re-use your existing PR's...if however you are getting NSA RR's than you will need hardened PR & guide plates and at that point I would also get .080 thick wall PR
it is recommended you "check" PR length when cahngeing cam & valve train parts.
You may very well wind up with the stock 7.200" PR...but the point is "check" first
if you are getting SA RR and the length checks out that stock will work than re-use your existing PR's...if however you are getting NSA RR's than you will need hardened PR & guide plates and at that point I would also get .080 thick wall PR
Thread Starter
Staging Lane
Joined: Aug 2014
Posts: 74
Likes: 0
OP
it is recommended you "check" PR length when cahngeing cam & valve train parts.
You may very well wind up with the stock 7.200" PR...but the point is "check" first
if you are getting SA RR and the length checks out that stock will work than re-use your existing PR's...if however you are getting NSA RR's than you will need hardened PR & guide plates and at that point I would also get .080 thick wall PR
it is recommended you "check" PR length when cahngeing cam & valve train parts.
You may very well wind up with the stock 7.200" PR...but the point is "check" first
if you are getting SA RR and the length checks out that stock will work than re-use your existing PR's...if however you are getting NSA RR's than you will need hardened PR & guide plates and at that point I would also get .080 thick wall PR
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TECH Fanatic
Joined: Aug 2008
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From: Nebraska
With 1.6 rockers, stock lifters, CC503, and untouched heads I ended up with a 7.100" PR. It had the most narrow pattern.
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Staging Lane
Joined: Aug 2014
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I measured and got 7.050 and that is with heads that just received a valve job. It could almost be 7.000 but I would rather have a pushrod that is a bit too long than a bit too short. Does that seem about right?
Thread Starter
Staging Lane
Joined: Aug 2014
Posts: 74
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7.050 seems very short for a head that has only a valve job. I called summit and they told me since I don't have a solid lifter or a checker spring to prime the oil system to pump up the lifters. I did that and got 7.050. Called them back and they said 7.050 should work fine. The only thing I can think of is the scorpion rocker combined with the different cam and valve springs to throw it off .150. I would really like someones input before I order pushrods.
TECH Veteran
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from this side of the internet, with your valve job/cam, 7.050 sounds short
this type of checker is simple an does not require a soft spring or solid lifter to accurately work
For $12, would be worth a check. I have used it to verify PR length determined the typical way. spot on.
http://www.summitracing.com/parts/pr...FcVffgod32cAow
They make one for 7/16 studs also
your lifter, without pre-load should be at its top, put PR in and the check tool on rocker stud. holding tool flat on valve spring the other side should be touching the PR.
for PR I use the TrickFlo Chromalloy hardened ones with .080 thick walls but I have NSA RR & guide plates
this type of checker is simple an does not require a soft spring or solid lifter to accurately work
For $12, would be worth a check. I have used it to verify PR length determined the typical way. spot on.
http://www.summitracing.com/parts/pr...FcVffgod32cAow
They make one for 7/16 studs also
your lifter, without pre-load should be at its top, put PR in and the check tool on rocker stud. holding tool flat on valve spring the other side should be touching the PR.
for PR I use the TrickFlo Chromalloy hardened ones with .080 thick walls but I have NSA RR & guide plates