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Thread: Swapping valve springs in the car

  1. #1
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    Swapping valve springs in the car

    Just like the title suggests Iím looking to see what compression tool if any you guys of had luck using swapping valve springs with the head still on the car. Iím assuming pressurizing the cylinder with compressed air to keep the house closed and uncompressing bow Springs. I have my own shop done this before but the tools I have donít fit this here. Curious if you guys have done this on car and suggestion on what works best.

  2. #2
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    Re: Swapping valve springs in the car

    I've done it with other engines. I just use a leakdown tool to pressurise the cylinder.

  3. #3
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    Re: Swapping valve springs in the car

    Quote Originally Posted by thedon809 View Post
    I've done it with other engines. I just use a leakdown tool to pressurise the cylinder.
    Yes Iím aware of pressurizing the cylinder to hold valves in place sorry if I didnít make that clear. My question is what tool have you guys used to compress the Springs. Typical one I use doesnít fit in there especially with the cam still in place. I wondered if guys out there have swap Springs and not touch the cam or if they have pulled cam and had good luck with a certain tool

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    Re: Swapping valve springs in the car

    Quote Originally Posted by Moparman141 View Post
    Yes Iím aware of pressurizing the cylinder to hold valves in place sorry if I didnít make that clear. My question is what tool have you guys used to compress the Springs. Typical one I use doesnít fit in there especially with the cam still in place. I wondered if guys out there have swap Springs and not touch the cam or if they have pulled cam and had good luck with a certain tool
    I did guide seals a couple of years ago. I ended up using the old school OHV compressor with the knob on the top...after trying ALL of the other types (except yanking the head for the C-clamp style). You're still going to have to take the 2 end caps loose to get the oil splash shield out of the way because no matter what, it IS in the way! Make no mistake...this was a ROYAL PITA and took a LONG time (for me anyways). You will want an extendable magnet and some reverse tweezers to put the retainers back in.

  5. #5
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    Re: Swapping valve springs in the car

    Quote Originally Posted by Moparman141 View Post
    Yes Iím aware of pressurizing the cylinder to hold valves in place sorry if I didnít make that clear. My question is what tool have you guys used to compress the Springs. Typical one I use doesnít fit in there especially with the cam still in place. I wondered if guys out there have swap Springs and not touch the cam or if they have pulled cam and had good luck with a certain tool
    Oh. I just use a cheapie puller with the knob on the top. I'd take the cam off.

  6. #6
    Supporting Member II Turbo Mopar Contributor minigts's Avatar
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    Re: Swapping valve springs in the car

    The AutoZone tool will work fine. You can also put rope in the cylinder and then rotate the crank to push the piston up and give the valve less room to drop. Did it one time to do replace the valve seals.


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    Re: Swapping valve springs in the car

    Quote Originally Posted by minigts View Post
    The AutoZone tool will work fine. You can also put rope in the cylinder and then rotate the crank to push the piston up and give the valve less room to drop. Did it one time to do replace the valve seals.
    Never heard of the rope idea sounds pretty cool. I have a very basic knob style but he didnít seem to want to work real good when I had to head on the bench. Went to using the C clamp style that I always have had luck with. Iím needing to do it on the car because I have exhaust springs in a week and causing a higher RPM miss due to excessive back pressure. A problem I will permanently remedy later when I get a better turbo and things of that nature but for now I just want this car run so I can go to the track see what sheíll do. Next season Iíll be building another engine

  8. #8
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    Re: Swapping valve springs in the car

    Do yourself a huge favor and just remove the cam.

  9. #9
    Supporting Member Turbo Mopar Contributor DOHCRT's Avatar
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    Re: Swapping valve springs in the car

    Use the factory tool, should still be available on ebay. Works great with the cam in place.


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    Re: Swapping valve springs in the car

    Quote Originally Posted by DOHCRT View Post
    Use the factory tool, should still be available on ebay. Works great with the cam in place.
    Such as https://www.ebay.com/p/Sealey-VS168-Valve-Spring-Compressor-Lever-Type/1504318276 ???
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  11. #11
    Supporting Member Turbo Mopar Contributor DOHCRT's Avatar
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    Re: Swapping valve springs in the car

    That's the one, kinda funky til you get the hang of it. Works great otherwise.


    Vic in Phoenix
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    Re: Swapping valve springs in the car

    Thank you very much for that. Looks like the ticket for me!! Judging but the looks it will actually use the cam to pivot on? At any rate Iíll be ordering one tonight!!

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    Quote Originally Posted by DOHCRT View Post
    Use the factory tool, should still be available on ebay. Works great with the cam in place.
    Awesome. Appreciate the help here. Many of you seem to be very willing to help and ansewer questions. Appreacate that!!

  13. #13
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    Re: Swapping valve springs in the car

    Quote Originally Posted by DOHCRT View Post
    Use the factory tool, should still be available on ebay. Works great with the cam in place.
    Awesome. Appreciate the help here. Many of you seem to be very willing to help and ansewer questions. Appreacate that!!

  14. #14
    Moderator Turbo Mopar Staff 135sohc's Avatar
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    Re: Swapping valve springs in the car

    Quote Originally Posted by minigts View Post
    The AutoZone tool will work fine. You can also put rope in the cylinder and then rotate the crank to push the piston up and give the valve less room to drop. Did it one time to do replace the valve seals.

    The rope filling method is far more forgiving than relying only on air pressure to keep the valve from falling into the cylinder. I have done it a few times.
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    Re: Swapping valve springs in the car

    Ive used the tool linked above and done fine. It takes some getting used to but after a while you actually get pretty fast at it.

    Dont push the red button.You hear me?

  16. #16
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    Re: Swapping valve springs in the car

    Quote Originally Posted by Moparman141 View Post
    Thank you very much for that. Looks like the ticket for me!! Judging but the looks it will actually use the cam to pivot on? At any rate Iíll be ordering one tonight!!
    Yes it does use the cam to pivot, I have the VS168 and it works. I used it to install PT lifters in the Sundance and CSX
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
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    Donor car '88 Daytona Shelby Z, TII with S60 Turbo/smec, 3 bar.

  17. #17
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    Re: Swapping valve springs in the car

    You STILL can't use that tool on cylinder #1 if the oil splash shield in still there...been there, fought that...

  18. #18
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    Re: Swapping valve springs in the car

    Quote Originally Posted by Reaper1 View Post
    You STILL can't use that tool on cylinder #1 if the oil splash shield in still there...been there, fought that...
    Yes I agree. I also removed the splash shield.
    Regards,
    Miles

    DD '87 Sundance T1, 12PSI, SLH with rear disks
    Project '87 CSX #432
    Donor car '88 Daytona Shelby Z, TII with S60 Turbo/smec, 3 bar.

  19. #19
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    Re: Swapping valve springs in the car

    Thanks, Iíll be using that tool and taken the shield out👍

  20. #20
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    Re: Swapping valve springs in the car

    Might as well do the front cam seal while you're there...

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