Can this motor be saved?

[zogthegreat]

Thanks Kentucky Boy.

I actually did a combination of wet sanding with 220 grit on a flat surface then freezing the wrist pin. It was still slightly tight, but I used a flat tip to get the clip to seat.

 

[zogthegreat]

Err, umm, does anyone know where this goes:

 

[mckutzy]

Looks like a lash cap for the intake valve(?)...

 

[zogthegreat]

Thanks mckutzy!

It actually goes on the exhaust, but you pointed me in the right direction.

 

[mckutzy]

Hehehe...
I had initially had typed exhaust and then edited it to say intake..

 

[zogthegreat]

So my head porting and polishing is going well. Since this is my first try, I'm going somewhat conservative on the job:

Question, Since I'm porting the head, will I need larger jets for the carburetor? And if so, what size jets should I order?

 

[mckutzy]

Get a few... Drill up a size accordingly to plug results...

 

[zogthegreat]

Drill up a size accordingly to plug results...

I'm not sure what you mean by "according to plug results". (Noob, remember! )

 

[Nosandwich]

Hehehe...
I had initially had typed exhaust and then edited it to say intake..

You big dummy...McClumsy!

Love ya ,man...nuttin but luv.

 

[mckutzy]

Look up on spark plug test. It tells weather the mix is lean/rich based on colour and other factors on the plug... (It's a bit to write)

Start the stock and take a fine number drill set, gauge the hole first. Then select the next size up and try again...till the right results you need..

 

[zogthegreat]

OK, I'm not sure what I'm doing wrong here, but the crankshaft is hitting on the piston:

I'm pretty sure that I have the right orientation for the connecting rod:

Any suggestions?

 

[mckutzy]

Can you try turning it around, the rod that is.. See if that makes a difference...

 

[zogthegreat]

Well, to quote Jamie Hyneman, "There's your problem!"

I dug out the old piston this morning. The new piston is considerably larger then the old one.

I'm going to contact the seller to see if they have a shorter one. But is it possible to grind down and polish the new one?

 

[Whitetrashrocker]

I'd get the right piston.
If you clearance that new one you will change the weight of it and it won't be balanced. The engine will shake like a misloaded washer in the spin cycle.

 

[zogthegreat]

Yeah, that's what I was thinking. For now, I'll polish the old one with some 1200 grit and use it just to get things moving along.

 

[Whitetrashrocker]

What's wrong with the old piston.

 

[zogthegreat]

It's a bit worn:

Since a new piston with rings was $10.00, I figured what the Hades. I should have kept things simple! The old one should be serviceable until I get in touch with the seller.

 

[Whitetrashrocker]

Is it smooth? Do you have a set of calipers that will size that? If it's smooth and straight I'd run it.

The first pic is the real way to measure but I found the second searching for a pic.

Kinda neat aren't they?

 

[zogthegreat]

LOL, the second pair look like something from the 1800"s!

The original piston seem smooth. I think that the marks are just a stain form the water being in the cylinder. I sanded it with 1200 grit and I'm assembling the motor now. Hopefully I can start it up tomorrow.

BTW, it's 0.010 for the valves, right?

---------- Post added at 07:55 PM ---------- Previous post was at 07:41 PM ----------

Grrrrr!!! Argh!!!! WTF?!?! I seem to have two timing marks on my crankshaft:

You can't tell from the photo, but both are the same!

Suggestions!

Aughhhhhhhhhhhhhhhhhhhhhhhhhhh!!!

 

[mckutzy]

No the real timing mark is the 9 o'clock position... thats a machining mark....