Well I'm also a qualified mechanic, and this video is exactly now NOT to do a quality valve job (what, don't even take the spark plugs out???) The valves need to be properly refaced to remove that pitting. The seats accurately resurfaced, and if done with quality equipment no lapping will be necessary. Put that much 'bearing blue' on a valve to check the valve seating and you should expect a 100% fit 100% of the time. The correct method is the faintest light smear on the valve, giving it a small twist in the seat to transfer the blue on any contact points. The key word is a very THIN smear.

"Speeded up"

Why didn't you use your drill in reverse also?

NO ! NO! NO! Only dynamic testing with OBDII tester is valid!!

Awesome video. The intermittent bad one is exactly what my cam and crank sensors are doing. As it reaches temp it dies randomly

what is signal? the 5 volt reference?

You need to go back and forth, not around and around.

Stratforward demonstration ! Brilliant.

Do NOT do this...anyone who tells you do grind the seat or valve with a drill, tell em to shut the tool box and walk away, Get a frigging valve job, do it once do it right. The end Troll away everyone. lol

WONDERFUL PRESENTATION ,EXELLENT

lazy way more like it.

No Setting info, no setup info?

Where are you finding suction cups that stick? I bought new, genuine "made in China" rubbers and finally had to rotate the valves with my fingers. (they didn't need lapping anyway, just a "feel good" exercise)

Another Charlie Chaplin silent vid! why bother

What engine is this head for?

The reason you hand lapping stick is crap , is because of the diameter , slim it right down in a lathe to a concave shape, it's best to do top and throat cuts to reduce seat width and help the valve cut carbon .

It would have been better if the grinding was clockwise as well as anticlockwise, intermittently.

My multimeter is auto ranged. If i hold it to M ohms i get not reading. In auto i get about 1 K ohms. Is that an indicator of the sensor being bad?

That is cool

Indonesia hdr

Great technique

Good video just too fast on the drill. The compoind will spin off. Slow ans steady does it

Terima kasih

what if there is no reading on the ohm test no matter what pair of pins i probe across

I have a better technique than this.

🤝🤝🤝👍👍

👍👍

Thank you!

arc welding with a filler rod is how I was taught/trained in high school metal shop class from 1977-1979....and its still how I do it today ! thanks for the DIY video !

Mi e was same exact way. I pulled the oring and was hard as a rock.

But do they have to seal ?100 percent cos a still have very tini air comprecion los even after polishing 😢

Why are my readings well over 200? It's set to ohms /resistance . ? Thanks no 5-12 volts

I ain’t reading all of that.

Never do this without flux.

Is that a wire in between bridging the positive and ground together that u have the yellow conne tor on?

Test may show if a sensor is dead, but still need an oscilloscope to determine if signal is clean or noisy garbage. Air gap tolerance is far too sensitive to replicate on a bench.

So much blue. Gonna get false contact with it that heavy.

The grace and peace be with you from the lord your God our father and his son Jesus thank you, but how many of you know about the good news repent and believe in the gospel because the kingdom of heaven is at hand and crack your word the Bible and continue blessing you! Luke 6:20-28-35-40

cool video. but why do you use the resistor?

When welding exhaust s and things like that is Tig and mig don't like rust or oil ,dirt etc even if you clean it back the steel can still be ingrained with crap that's where stick welding stands out above the other 2 it will produce good welds even with dirty steel that's why it's king out on work sites

I think they call that Texas Tig welding using another rod as a heat sink works well.personally for me turn down the amps down a bit probably like 45 ,50 amps tilt it up a bit weld it up nice and quiet with 2.5 ,6013

Great video so informative yet so simple thank you very much save me a ton of time!!

Yeah that's good I taught myself to do that too after a few holes I've got it down 👍

Excellent idea using a filler rod

if r.p.m not move when you start car = crankshaft sensor is damage . result the engine not work

You watch a video like this in which this guy meticulously laps the valve and checks it to see if he's in spec. Then you read a comment from an engine builder who with his 30 years of experience confesses he's never lapped a new valve and never had a problem, Lol. Not saying you should or should not that's entirely up to you and your peace of mind but hey if you are wondering if its been done that answer is a yes.

thank you so much for the dimensions and OEM part number! almost impossible to finde anywhere else. Do you have the engine parts number listing?

What's the name of the tool he uses to sit the guide and socket through? Need myself one of those.

Now how about a hall effect sensor without a low reference? I have a dual hall-effect (two sensors with a shared magnet) which is a four wire. It does not have a 5v reference. How can I bench test this sensor?

Superb explanation...