Pushrod Length
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 285
Likes: 0
the guy at my local speed shop where i bought the adjustable pushrod checker said i had to use stock springs also. Is that true? do i need to pull these comp cams springs out and put the stock ones back in to use the checker?
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 285
Likes: 0
[QUOTE=82f100460;11832549]I would question how you put your rocker arms back on. On the hydraulic cams, you are supposed to put the engine at TDC on the compression stroke and tighten 8 of them to the proper torque (18-25 according to my book). Then rotate the crank 360 degress so it is at TDC on the exhaust stroke and tighten the other 8 to spec.
This is true with the type of rocker studs i have? I didn't think they were a torque spec, from what i have heard i take out the slack and then go another half turn..... i'm getting confused again now.... lol
This is true with the type of rocker studs i have? I didn't think they were a torque spec, from what i have heard i take out the slack and then go another half turn..... i'm getting confused again now.... lol
Posting Guru
Joined: Jan 2012
Posts: 1,410
Likes: 1
From: Dallas, GA
I wasn't aware that you changed the studs. If you have, then there may be a different valve clearance adjustment process other then what the stock calls for...I would not know what that would be.
You would have to see what the manufacturer of those studs call for.
You would have to see what the manufacturer of those studs call for.
Posting Guru
Joined: Jan 2012
Posts: 1,410
Likes: 1
From: Dallas, GA
All I can tell you is what's in the ford shop manual. If you think about it, the way you describe doing it don't make any sense. If you have a lobe all the way up (meaning it wants that valve open) and you simply tighten the rocker nut until the pushrod stops turning and another turn or so, when that lobe rotates 180 degrees down, all the area that lobe was taking up is not gone and your pushrod will be loose. In fact...you may never open that valve.
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 285
Likes: 0
Maybe i don't even need other pushrods, maybe i just was going about this all totally wrong..... you may be on to something! So back to an earlier discussion, the lifters I have in place are ok? How do I feel them "pumped" up while doing all this torgueing? Should I pull the dist out and spin the oil pump in between torqueing each one? Or will they be ok to do them all quickly? I did grind the gears off a dist to make an oil primer when i was assembling this motor, i have that here somewhere...
But if i have some that are loose, then obviously they still are too short, because they should NEVER be loose right?
I just want to make sure none of them are up on a lobe when torqueing them down right?
I'm gunna get this i swear!
But if i have some that are loose, then obviously they still are too short, because they should NEVER be loose right?
I just want to make sure none of them are up on a lobe when torqueing them down right?
I'm gunna get this i swear!
Posting Guru
Joined: Jan 2012
Posts: 1,410
Likes: 1
From: Dallas, GA
Maybe i don't even need other pushrods, maybe i just was going about this all totally wrong..... you may be on to something! So back to an earlier discussion, the lifters I have in place are ok? How do I feel them "pumped" up while doing all this torgueing? Should I pull the dist out and spin the oil pump in between torqueing each one? Or will they be ok to do them all quickly? I did grind the gears off a dist to make an oil primer when i was assembling this motor, i have that here somewhere...
But if i have some that are loose, then obviously they still are too short, because they should NEVER be loose right?
I just want to make sure none of them are up on a lobe when torqueing them down right?
I'm gunna get this i swear!
But if i have some that are loose, then obviously they still are too short, because they should NEVER be loose right?
I just want to make sure none of them are up on a lobe when torqueing them down right?
I'm gunna get this i swear!
I would go torque them all down like I outlined and see what it gets you. It will cost you nothing, except maybe a set of valve cover gaskets.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Posting Guru
Joined: Jan 2012
Posts: 1,410
Likes: 1
From: Dallas, GA
If this is not your prolem...then the cam/lifter set up you put in must need different length pushrods. At that point, I'd call them and ask them what to do...they would probably know right off hand what you need
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 285
Likes: 0
Do I need to remove the comp cams valve springs and replace them with stock springs when using the pushrod length checker?
The guy at the speed shop where i bought the checker said i had to use stock springs for this process
The guy at the speed shop where i bought the checker said i had to use stock springs for this process
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
the reason for the stock springs or actually better yet a test spring (I use the dampener inner spring for this) is the pushrod length checkers are not very strong and they will bend under full spring strength pressure. Even stock springs can bend them.
Actually on high lift cams stock springs can't be used either just do to coil bind although not sure yours would reach that but it would be close.
Actually on high lift cams stock springs can't be used either just do to coil bind although not sure yours would reach that but it would be close.
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
or take the outer spring off and just use the inner spring. your not trying to control the valve train while running your just trying to keep some pressure on the valve while you turn it over by hand to see the alignment. Test springs are even lighter.
Here to give you an idea is ones that Jegs sells. you can see how light of a spring they are.
JEGS Valvetrain Checking Springs - JEGS
Here to give you an idea is ones that Jegs sells. you can see how light of a spring they are.
JEGS Valvetrain Checking Springs - JEGS
Thread Starter
|
Senior User
Joined: Nov 2008
Posts: 285
Likes: 0
excellent, i placed an order with summit an hour ago for some other items, i just called and added those springs. they had some by comp cams for $2.95. Thanks for the heads up!
COMP Cams 4758-2 - COMP Cams Valvetrain Checking Springs - Overview - SummitRacing.com
COMP Cams 4758-2 - COMP Cams Valvetrain Checking Springs - Overview - SummitRacing.com