Has anybody used this tool to change valve seals? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-19-2010, 01:45 PM   #1
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Default Has anybody used this tool to change valve seals?

A buddy with a Supra said his mechanic used one of these to remove/install the keepers.

http://buy1.snapon.com/catalog/item....&group_ID=1578

Said he fed rope into the cylinder instead of using compressed air, then just whacked this tool -gently- with a 2lb hammer. Flip the tool around and load the keepers and push or whack it again to pop them back in.

There are instructions here for making your own:
http://mkiv.com/techarticles/valve_stem/index.html

Has anybody used one of these on one our our heads? That would be sooooo cool.
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Old 05-19-2010, 01:49 PM   #2
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A friend of mine has one and swears by it. Says its the best tool for the job
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Old 05-19-2010, 02:09 PM   #3
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yes, without the whacking.
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Old 05-19-2010, 02:28 PM   #4
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Quote:
Originally Posted by Braineack View Post
yes, without the whacking.
It'll work by just compressing the spring by hand? Excellent!
I was a little afraid of screwing up a bucket bore or bending a valve with a hammer.
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Old 05-19-2010, 02:33 PM   #5
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whacking works to remove, but without using something with a strong magnet, the keepers go flying. you can push down and compress the valve springs by hand without trouble.

When it comes to putting them back, I dont see a way that whacking would work. but just slowly compressing, they drop in place and you let up.
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Old 05-19-2010, 02:39 PM   #6
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Should I get P# GA317 or GA318A ?
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Old 05-19-2010, 02:44 PM   #7
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probably GA317 since it's smaller. dunnoz.
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Old 05-19-2010, 09:49 PM   #8
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i got the overhead cam valve tool off the snap on truck for like 140 i think, im not to sure if id try the tap one, but people have had luck with it so who knows.... if also heard of people not pushing air into the cylinders either and using rope to hold the valve up after pushing the piston up.... so how ever you wanna do it i guess....
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Old 05-19-2010, 10:35 PM   #9
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I have used the smaller GA317 one and it works as advertised. I loaned it to Rob / m2cupcar and he made a short youtube tutorial video.



And, here is what Rob had to say about it on our local forum:

Quote:
Originally Posted by m2cupcar
Ferdi dropped off his BluePoint valve tool and I got busy. It took some time to figure out what worked best and then things started to move along. The worst part was the height of the car- on the ground was too low and on the jack stands at the lowest point was too high. I ended up with it on the stands as the lesser evil of the two. But it really hurt the leverage of installing the retainer/keepers. Ramps would probably be ideal for a Miata... for my size/height.

The original seals were shot- most of them left half their insides stuck on the guides, which meant I had to scrape the stuff off with a dental pick. PITA. The approach that worked best for me was using a hammer to disassemble and hands with a firm press to install. But you can see from the video it does take a persuasive smack with the hammer to get the job done. The install requires a good firm jaunt - I used one hand to guide/maintain approach angle and the other for the press. Rear cylinders are worse partly because of the hood- but I was hesitant to remove the hood given the soft fresh paint.

After rolling the number 1 piston to tdc, I used a compression gauge hose with the internal valve removed to hold the valves shut with the compressed air. I used about 75psi. Make absolutely sure you have a wrench on the crank bolt and have it fixed to something so it can't move. Otherwise you'll watch your pistons go up and down- I kid you not, it doesn't take much air to rotate the engine. After number 1, move to number 4 since it's already at TDC, then go to the middle cylinders.

I recommend buying a valve seal removal tool. This is the second time I've done this w/o one and it is the worst part of the job. I manage to make an SST that worked out nicely, but probably not nearly as good as a tool designed for the job.

Most critical things to consider when using this tool:
  • Face of the tool needs to seat on the retainer square up, in line with the valve stem so force is exerted evenly across the retainer. This also avoids hitting the lifter walls with the tool.
  • The force of the hammer hit is going to be harder than you'd think.
  • On installation, leverage is your friend. Get the cylinder head height right where you need it to get your torso weight into the pressing action.
--Ferdi
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Old 05-19-2010, 10:38 PM   #10
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I bought and used a Toyo ValveMaster for my several rounds of head work, and it worked OK. Certainly much easier than using a standard clamp style tool with picks and grease and all of that bullshit.

http://www.toyotool.com/PURCHASE.htm

A bit costly, but if you do it more than a few times, it's easily worth $80.
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Old 05-19-2010, 10:50 PM   #11
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I love you guys.
I ordered the 317. I told my wife how cool it will be and she rolled her eyes at me. She's obviously never done this with PVC, a magnet, and tweezers before.
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Old 05-20-2010, 11:44 AM   #12
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What have you guys used to remove the seals themselves? My reading seems to indicate you shouldn't use standard pliers as they are likely to scratch the bores/valve stems?
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Old 05-20-2010, 12:22 PM   #13
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Quote:
Originally Posted by timg View Post
What have you guys used to remove the seals themselves? My reading seems to indicate you shouldn't use standard pliers as they are likely to scratch the bores/valve stems?
Just don't be a retard with them. I used regular needle nose to put the new ones on and off about 3 times, with no damage. Just don't squeeze them too hard, and all will be fine. Worst case scenario, wrap the plier ends with duct tape or something, for a high tech, non slip and non abrasive surface.
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Old 05-20-2010, 12:31 PM   #14
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There are valve seal pliers AND that's what I would have used but the opportunity to do the job came up and I could find them at a local store. So I took a chip puller, cut it in half, clamped it with a pair of vice grips and it worked amazingly well. I just had to work my way around the seal to pull it off whereas the seal pliers would have just pulled it straight off.
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