Yasssssss❤

Keep them coming

About lapping the valves. In these motors, in fact, the valves cannot be lapped. Personally, I always grind the chamfers on the valves and cut the chamfers on the seats on the machine. and I collect it without lapping. If you're interested, I'll tell you why.

@SamAbraham

3 ай бұрын

As per recommendation of AMG techs and friends who have worked on the M156 before, I lapped them. The affected cylinder now makes 245psi of compression while cold, which is about the same as the rest of bank 1. Well within factory specification.

@motor943

3 ай бұрын

@@SamAbraham it's about the valve seat material. Beryllium bronze is gaining abrasive. In general, there are many nuances in the repair of the cylinder head. It makes no sense to rub the valves and achieve tightness on the removed cylinder head. when tightening the cylinder head, the geometry of the seats is distorted. It is necessary either to cut the saddles with a false plate, or simply ignore the slight vibration after assembly - the valve seats are being worked on. It's all been gone for a long time. a perfectly lapped cylinder head does not pass the vacuum test on the block. There is another important nuance - the wear of the guide rail. Personally, I have not rubbed the valve for about 10 years. After milling the valve seats chamfers and grinding the chamfers on the valves, no fine-tuning is required. If there is a decrease in compression due to the valve mechanism, I would still not grind the valves, but mill the chamfers on the machine. Another reason I forgot to mention is the width of the working chamfer.

@SamAbraham

3 ай бұрын

@@motor943 Drove it 30 miles today, and it feels great. Before lapping the valves did not seal. After lapping they did.

What kind of silicone rtv did you use for the bed plate? About to do this job myself and have seen that the best would be anaerobic sealant

@SamAbraham

3 ай бұрын

It’s a Mercedes specific sealant that must be used for bedplate and both oil pans along with the timing cover. I’ll link it in the next vid, don’t have the part number on hand

Say how did you do the compression test and how would I find out if I have a bent valve also, I have same ml and I’m getting some weird behavior intermittent

@SamAbraham

3 ай бұрын

Compression tests are pretty standard on any engine you just need the tool that will fit the M156 spark plug diameter (12 or 14mm can’t remember at the moment). But if you have bent valves your car wouldn’t really be running at all without dying, you likely have other issues

Nice video i have ML 320 w164 and i love to have one of these ML AMG. I want to ask you about the maintance. Need a lot of budget to afford this car ?

@SamAbraham

2 ай бұрын

Yes

Such emotions... I'm not trying to devalue your success, don't think, you're great that you figured it out and did it yourself. When I went through my first motor, the emotions were exactly the same, but now it's a routine, and another wound-up motor causes emotions comparable to those from drinking a can of beer... It has become so commonplace for me. It was only after your video that I thought that I really do very complex and high-quality repairs in the style of pakistan truck. Unfortunately, these are the realities of life in Russia... On my 204, I assembled the m273 piece by piece, and swapped it. I have a video where I assemble the cylinder head, and the lights are turned off, And I assemble it under the light of flashlights))

@SamAbraham

3 ай бұрын

Not sure what your point is? Just giving an update on my project lol, people have been asking me

@rudy_w210_5

3 ай бұрын

I’m sorry is that the same video where you set the pistons and crank on that dusty floor full of contaminants? You my friend have a looooong way to go.

@motor943

3 ай бұрын

@@rudy_w210_5 well, yes, a dead engine that is disassembled for spare parts does not care which floor it was put on. Especially the pistons that went to the trash don't care. Unlike you, at least I do something more than tapping on the keyboard. 😉

@motor943

3 ай бұрын

​@@SamAbraham my statement is without a negative context. It's just that I live by it myself, so I just spoke out, nothing more.

@SamAbraham

3 ай бұрын

@@motor943 Thanks for the clarification, cheers 👍

can you do c63 507 pov

@SamAbraham

3 ай бұрын

what do you mean by this lol like pov of driving it?

@stefanbs17

3 ай бұрын

@@SamAbraham yep

@SamAbraham

3 ай бұрын

@@stefanbs17 not really any different from any other C63 honestly lol, I'd make one but there are plenty of other vids on it already