Why The Suction Cup Method For Valve Lapping Sucks!

Рет қаралды 30,027

Жыл бұрын

Пікірлер: 56

@brandonharvey7939 10 ай бұрын

Clean the valve thoroughly and put a dab of maple syrup on the suction cup... push the suction cup down tight on valve and make it spin around on the valve to evenly spread the fluid.... should stay put

@Jin-Ro Жыл бұрын

The suction cup ones used to be good (Pre 2000 year), but the market is now flooded with crappy chinese ones with this stiff type rubber. If you can buy a branded lapping tool with the more pliant rubber heads they work fine. Just don't cheap out.

@dubl0devin 8 ай бұрын

Use a drill from the underside. Can't go wrong

@gordocarbo 2 ай бұрын

Sorry man that is 100 percent wrong. Dont use a drill just get a valve job do it right.

@Altair885 Ай бұрын

@@gordocarbo I would love someone to explain the technicality of why this method is wrong. Yeah I've read about how it might cause it to grind the valve/seat unevenly. But how exactly if the guide and stem are true? In my mind the valve will 'wobble' just as much if done using a sucker. Either way, I'll still be using a drill. Never had any problems in all the years I've done it that way!!

@dougsgtp 11 ай бұрын

Use the bigger cup and a fan of moisture. I literally just lapped 8 valves like this. Cup needs to be closer to the size of the valve.

@mitchelldake7203 Жыл бұрын

Interesting tip! I also saw a guy once gently warm the valves with a heat gun and jam a big glue stick on it and use that. Worked pretty well, but may not have been that practical for an every time thing.

@Ginjaninja0051 9 ай бұрын

I second this, but I've got glued directly to the tool but also to scrap broom handles or similar. Hot glue is easy to use and easy to remove when done.

@TheBlazingKnightsProduction 4 ай бұрын

I like the drill. I know so many say ots wrong but thats old thinking as long as you dont go crazy and you stay in line it works great and takes about 1:10th the time.

@Altair885 Ай бұрын

Same, been doing that way for years and never had an issue. Even on modern diesels it's worked out fine, I always get perfect looking valves and seats and never have any compression issues.

@charlesfields7908 Жыл бұрын

I go the hose and drill route and I put a hose clamp on it just for extra measure. I put a little dab of grease on the valve stem for the guide, again just extra measure. One of your comments mentioned pits, took me 1 to 1.5 hrs per valve to lap the pits out of the valves for the heads I'm working on, that's with the drill.

@joe-hp4nk Ай бұрын

The cup works great for me.

@stellarv5689 12 күн бұрын

Someone finally said it..

@samuelquemecuentas 29 күн бұрын

you can add a bit of oil in the cup

@zachcrowl8504 Жыл бұрын

Try taking a little piece of jewelers dop stick wax and putting it in the center of the suction cup

@xlv2manx 8 ай бұрын

Maybe if you didn’t keep pulling the valve up it would stay

@themotobarn702 8 ай бұрын

Fair point, but this is the technique I learned.

@wally7856 8 ай бұрын

You have to pull the valve up to allow more compound in there as it squeezes out. You can hear when it needs to be lifted, it gets quiet.

@gordocarbo 2 ай бұрын

Best post. Needs to slow down and be patient. No need to lift up

@stevenbelue5496 5 ай бұрын

They were intented to be used after a proper valve job with stones or cutters. That would be plenty of time to check for concentricity or see where your point of contact falls. Lapping has become a multipurpose, like aforementioned or to conform mismatched valves and seats or old pitted non-sealing surfaces to get an old valve job sealing again with minimal investment and your up and running again. If your not worried about power potential or fuel economy it'll do.

@steviedwalls 5 ай бұрын

Dip your finger in water and rub it on the suction cup before placing it on the valve. 👍🏽

@CianaRo169 4 ай бұрын

I tried this and it works🎉

@steviedwalls 4 ай бұрын

@@CianaRo169 glad to be of help.

@supair8059 21 күн бұрын

I walways spit on it and don't forget to oil the guide and the stem. Peace

@usastrong8088 Жыл бұрын

Use alcohol to clean the top before you use tool

@gordocarbo 2 ай бұрын

This...he needs to slow down and be patient. Lapping needs very little effort or time. These guys wanting to grind the pee out of seats using drills....drives me p the wall. More harm than good

@lewis2553 8 ай бұрын

PROBLEM SOLVED, here, dude. I remembered that I had some spirit gum that I had bought from Bargain Bins for about a quarter or 50¢. I put some on the suction cup and squished it against the valve which I had sanded. Then I removed it to let it dry some. It works amazingly well. The only thing is, I think I should have degreased the valve and cup first will anhydrous isopropyl alcohol or carburetor spray. It might have worked even better. The spirit gum is a "professional adhesive for applying prosthetics, bald caps, wigs, and crepe hair". It is a product of Mehron, Inc. in Chestnut Ridge, NY. It comes with a bottle of remover, but I might just leave it on and let it burn off. It DEFINITELY HELPS.

@themotobarn702 8 ай бұрын

I would not want to use something that strong. I used to do musical theater and used spirit gum and that stuff was awful to get off!

@lewis2553 8 ай бұрын

@@themotobarn702 Maybe, but it won't last long when I build a fire in those cylinders, especially on the exhaust valves. You can't burn it off your face, but off a valve face, yes, you can.

@charles0423 8 ай бұрын

For 2cv racing engines I just put the valves on a drill and grind away

@gordocarbo 2 ай бұрын

Wrong hate to tell ya esp for a racing engine. Losing power doing this

@clashofclansplayer3457 10 ай бұрын

that how i do it when i work on motorcycle heads, its wayyy easier

@crownvictorialifestyle4421 10 ай бұрын

Let a machine shop do your valve job and you won't have to worry about things like this

@themotobarn702 10 ай бұрын

That's what I ended up doing, as it really needed it.

@lewis2553 8 ай бұрын

If a shade tree mechanic had that much money, he wouldn't be having to be a shade tree mechanic. DUH!

@rbarr1200 3 ай бұрын

You could also let a maid clean your house. A landscaper cut you your weeds. An arborist trim your trees. A window washer wash your windows. A painter paint your house. A detailer wash your car. A dry cleaner wash your clothes. A food delivery service feed you A fuel truck pump your gas. And last but not least your wife could scratch the itch on the back of your head.

@gordocarbo 2 ай бұрын

Best post!! Do it once, do it right .All these drill it hard videos are hackjobs and can lose them power. Maybe doing things right is called "old thinking" now. haha.

@gordocarbo 2 ай бұрын

@@lewis2553 Had what money? For a valve job? Buy less beer theres only one way to do this, the right way. Valve job nothing will take its place.

@DingleFlop Жыл бұрын

I've only actually seen this twice. What is the purpose of valve lapping? Is it about the sealing faces..? Does it actually have a measurable impact on performance?

@themotobarn702 Жыл бұрын

It's a very common practice to ensure a proper seal between the valve face and valve seat. In my case, mine were heavily pitted and I was attempting to "restore" them without going to the machine shop. Long story short, I will be getting a proper valve job this time around, as the head required it.

@richardpotts8517 11 ай бұрын

I added a small amount of #90 oil

@gordocarbo 2 ай бұрын

Its only used to ck if its sealing or not. Quick lap no more. Doesnt substitue for a valve job. Vids of grinding the daylights out of parts with a dril are wrong wrong wrong. You can lose performance doing that. Valve job is the right thing to do if its not completely sealed

@lazarimanal3415 9 ай бұрын

That it my work ❤❤❤

@paradiselost9946 9 ай бұрын

i made my own tool. had to, no other way to grab a 15mm valve... just a piston in a lil cylinder of knurled aluminium with a drawbar/locknut, oring on the face. if there was a market i guess i would sell them. not many people grind valves anymore.

@stephenbayer5303 Жыл бұрын

Magnet

@levigrafton6854 9 ай бұрын

He didn’t lick the suction cup that’s why

@themotobarn702 9 ай бұрын

You know what... you're not wrong. Can't believe I forgot that! Thanks for the reminder!

@levigrafton6854 9 ай бұрын

@@themotobarn702 😂😂 I just watched a valve lap job, and it was a clear point to lick the suction cup. Moisture is the trick. Lol. But nah, I’m sure these suction cups arent really good on old valves that aren’t clean even though they’re clean as mentioned.

@gordocarbo 2 ай бұрын

@@themotobarn702 You should post up you got a valve job done..how important it is and let others know the drill hack job thing is wrong. Esp after guys port. PLenty of power to be gained with a V.J. I dont think many realize how much. Good on you for sprining and doing it right.

@shenyang2113 9 ай бұрын

You can’t figure out how to use a tool and post a video about it. Maybe try learning the craft or just stop misinformation.

@shenyang2113 9 ай бұрын

The worst. You made an effort to not even use it correctly

@themotobarn702 9 ай бұрын

Thank you for such a wonderful comment. No misinformation, simply showing what I did and how it turned out for me. Already learned from a much nicer, informative comment that I should have wet the cup first, which slipped my mind. Have a great day.

@DBSMODs 8 ай бұрын

@@themotobarn702... Also... You have to push every time you spin the valve so the suction cup is reseated each time you push anyway.... I like to rub the suction cup on my forehead just before using... The oils from your skin make it stick real good.