Previous Thread
Next Thread
Print Thread
Valve springs #1070135
09/06/11 02:23 AM
09/06/11 02:23 AM
Joined: Apr 2010
Posts: 93
CA
M
mojavered Offline OP
member
mojavered  Offline OP
member
M

Joined: Apr 2010
Posts: 93
CA
Can valve springs be changed while heads are on engine in the car? Just curious.


71 Challenger RT
440 / 727 / 8.75
Re: Valve springs [Re: mojavered] #1070136
09/06/11 03:39 AM
09/06/11 03:39 AM
Joined: Jul 2009
Posts: 489
IL
E
EchoSixMike Offline
mopar
EchoSixMike  Offline
mopar
E

Joined: Jul 2009
Posts: 489
IL
Sure, just make sure you don't drop the valves into the cylinders. S/F.....Ken M

Re: Valve springs [Re: mojavered] #1070137
09/06/11 07:40 AM
09/06/11 07:40 AM
Joined: Dec 2006
Posts: 4,647
aotearoa
rebel Offline
master
rebel  Offline
master

Joined: Dec 2006
Posts: 4,647
aotearoa
you sure can. there's 2 types of tools for doing the job & there's a proper proceedure to follow to prevent screw ups. i've just had mine off to check spring pressures, sure beats all the cleaning of gasket surfaces if you had to pull the heads.

Re: Valve springs [Re: rebel] #1070138
09/06/11 10:32 AM
09/06/11 10:32 AM
Joined: Apr 2010
Posts: 93
CA
M
mojavered Offline OP
member
mojavered  Offline OP
member
M

Joined: Apr 2010
Posts: 93
CA
Thanks, That is what I want to eliminate. What is the "correct" tool to use?


71 Challenger RT
440 / 727 / 8.75
Re: Valve springs [Re: mojavered] #1070139
09/06/11 11:47 AM
09/06/11 11:47 AM
Joined: Oct 2003
Posts: 7,506
Az
Crizila Offline
master
Crizila  Offline
master

Joined: Oct 2003
Posts: 7,506
Az
You will need a tool to pump air in to the combustion chamber to keep the valves closed. I use the hose from my compression tester after removing the schrader valve from the spark plug end. I plug in the other end ( gauge end )in to shop air. The spring compressor in the pic is for stud mounted rockers. There is a similar tool for shaft mounted rockers. You can do one cylinder at a time ( intake and exhaust ) by setting that cylinder at TDC on the compression stroke. Once you have the cylinder you are working on at TDC and aired up, you will want to smack the valve spring retainers with a soft mallet ( rubber / plastic ) to loosen the keepers before you compress the springs.

6813403-DSC01459.JPG (34 downloads)

Fastest 300
Re: Valve springs [Re: Crizila] #1070140
09/06/11 11:54 AM
09/06/11 11:54 AM
Joined: Jan 2003
Posts: 27,421
Balt. Md
3
383man Offline
Too Many Posts
383man  Offline
Too Many Posts
3

Joined: Jan 2003
Posts: 27,421
Balt. Md
I bought this tool from Mancini and it works great. Just bolt it to the head by the rocker shaft bolt holes and then after you put air in the cyl you just screw the allen head bolt to push the spring down and remove the locks. Ron



Re: Valve springs [Re: 383man] #1070141
09/06/11 11:55 AM
09/06/11 11:55 AM
Joined: Jan 2003
Posts: 27,421
Balt. Md
3
383man Offline
Too Many Posts
383man  Offline
Too Many Posts
3

Joined: Jan 2003
Posts: 27,421
Balt. Md
Here is another pic of it. You can do 2 valves (one cyl) before you have to move it to the next cyl. Ron




Last edited by 383man; 09/06/11 11:56 AM.
Re: Valve springs [Re: mojavered] #1070142
09/06/11 02:38 PM
09/06/11 02:38 PM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
http://chucker54.stores.yahoo.net/vaspreto.html
one on right works fine.

always do it with piston up whack valve spring retainer with plastic hammer to lossen keepers!

Re: Valve springs [Re: mojavered] #1070143
09/06/11 02:53 PM
09/06/11 02:53 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Quote:

Thanks, That is what I want to eliminate. What is the "correct" tool to use?


Comp Cams sells a kit that works very well on Mopar motors, LA and RB,B motors The BB part # is 5324 and part # 5323 for SB LA and V6 motors I have both and have used both of them, way better than the old lisle screw type compressors


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Valve springs [Re: Cab_Burge] #1070144
09/23/11 08:20 PM
09/23/11 08:20 PM
Joined: Apr 2010
Posts: 93
CA
M
mojavered Offline OP
member
mojavered  Offline OP
member
M

Joined: Apr 2010
Posts: 93
CA
Thanks for all the part numbers!

Now, is there a way to know if the springs are not right for your setup?


71 Challenger RT
440 / 727 / 8.75
Re: Valve springs [Re: mojavered] #1070145
09/23/11 08:29 PM
09/23/11 08:29 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
C
Cab_Burge Offline
I Win
Cab_Burge  Offline
I Win
C

Joined: Aug 2003
Posts: 43,007
Bend,OR USA
Quote:

Thanks for all the part numbers!

Now, is there a way to know if the springs are not right for your setup?


Absolutely, you will need a valve spring pressure tool to measure the pressures and some measuring tools to see what the installed hieght is and how much valve spring pressure you have on the seat and how much with the valves opened all the way and how much clearance you have between the valve retainers and valve seals and how close to coil bind you end up with the valves opened up all the way, nothing to it ONCE you've done it several times Now get to work


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Valve springs [Re: Cab_Burge] #1070146
09/24/11 10:48 AM
09/24/11 10:48 AM
Joined: Nov 2007
Posts: 174
Indiana
S
Scott58 Offline
member
Scott58  Offline
member
S

Joined: Nov 2007
Posts: 174
Indiana
Anyone got some recommendations for a similar valve spring tool for 2G Hemi's?

Scott







Powered by UBB.threads™ PHP Forum Software 7.7.1