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Big Block Talk! Everything about swapping a big block engine into your cart! |
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03-20-2014, 06:02 PM | #1 |
Not Yet Wild
Join Date: Sep 2011
Posts: 36
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Installed rev kit, now bending pushrods
I installed a rev kit for my 23 hp vanguard motor, installed everything per cpps instructions, when i turn the motor over by hand and watch the rockers go up and down the springs completely shut and start to bend the pushrod. Ive double checked everything, set the valve lash correctly, if i adjust the pushrod adjuster on the rocker for less pressure then the pushrods falls out, what could be wrong, all 4 valves are doing the same thing, do i need to take one shim out?
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03-20-2014, 06:03 PM | #2 |
Gone Wild
Join Date: Oct 2010
Posts: 6,730
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Re: Installed rev kit, now bending pushrods
Can you post a picture of the setup? I'm interested in what the springs look like in the free state.
You may have heavy-duty springs. Stock springs will be .860" diameter, 1.57" long, and have 7 coils of .098 wire. |
03-20-2014, 07:25 PM | #3 |
Gone Wild
Join Date: May 2011
Location: Pickens/Dacusville s.c.
Posts: 1,386
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Re: Installed rev kit, now bending pushrods
I only used 1 shim on mine with good springs you should be ok if you have a high lift cam mine wouldn't spin over with 3 shims the springs would bind up and if I tried to make it go you could see the stress on the push rods...
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03-20-2014, 07:46 PM | #4 |
Gone Wild
Join Date: Nov 2012
Posts: 567
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Re: Installed rev kit, now bending pushrods
Yep sounds like coil bind.
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03-20-2014, 08:00 PM | #5 |
Not Yet Wild
Join Date: Sep 2011
Posts: 36
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Re: Installed rev kit, now bending pushrods
image.jpg
I bought this cart with the motor already in it, i learned once i popped the flywheel of it already had a timing key in it, so im not for sure if this thing has aftermarket springs in it or stock |
03-20-2014, 08:07 PM | #6 |
Not Yet Wild
Join Date: Sep 2011
Posts: 36
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Re: Installed rev kit, now bending pushrods
On that pic its completely closed, and the pushrod is still pushing the rocker up.
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03-20-2014, 08:08 PM | #7 |
Gone Wild
Join Date: Oct 2010
Posts: 6,730
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Re: Installed rev kit, now bending pushrods
Do you have a stock cam, or is it a higher lift?
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03-20-2014, 08:10 PM | #8 |
Gone Wild
Join Date: Oct 2010
Posts: 6,730
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Re: Installed rev kit, now bending pushrods
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03-20-2014, 08:11 PM | #9 |
Not Yet Wild
Join Date: Sep 2011
Posts: 36
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Re: Installed rev kit, now bending pushrods
Im not for sure, i bought the cart as is last year, it may be, when i set the valve lash correct to lifts the pushrod to far. Should i try just two shims and see if it will have clearance.
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03-20-2014, 08:13 PM | #10 |
Not Yet Wild
Join Date: Sep 2011
Posts: 36
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Re: Installed rev kit, now bending pushrods
Completely closed as in no more spring flex left, the coils are touching in that pic, its hard to tell, but if i keep turning the motor the pushrod starts to flex
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