Replacement motor questions but hopefully fixable

[rockdogz]

Can we back up a minute?

I understand you swapped coils, but did you verify spark was actually going across the strap at the spark plug?

Other than a collapsed lifter, you have ruled out pretty much everything else. So now it's a matter of verifying the result.

How would you verify the spark?

 

[Tonyrodz]

How would you verify the spark?

Probably as easy as sticking a screwdriver in the spark plug wire and grounding it against metal, then cranking it.

 

[TollKeeper]

Probably as easy as sticking a screwdriver in the spark plug wire and grounding it against metal, then cranking it.

Correction, grounding it near metal, and having someone crank the engine while you watch for spark. If it's on the metal, you won't see the spark. You want to see a bright blue spark.

 

[wsteele]

Can we back up a minute?

I understand you swapped coils, but did you verify spark was actually going across the strap at the spark plug?

Other than a collapsed lifter, you have ruled out pretty much everything else. So now it's a matter of verifying the result.

He pulled the valve cover and verified the rockers are operating properly.

 

[Tonyrodz]

Correction, grounding it near metal, and having someone crank the engine while you watch for spark. If it's on the metal, you won't see the spark. You want to see a bright blue spark.

Yes. I'm terrible at explaining things in detail.

 

[rockdogz]

#2 exhaust lifter. Think this is it?

 

[wsteele]

View attachment 347780#2 exhaust lifter. Think this is it?

You mean #4?

#2 isn't an AFM lifter, like you have in your hand.

Is it collapsed?

Edit: and, yes, it IS a problem, if not THE problem...

 

[89Suburban]

Ouch.

 

[rockdogz]

You mean #4?

#2 isn't an AFM lifter, like you have in your hand.

Is it collapsed?

Edit: and, yes, it IS a problem, if not THE problem...

Yes sorry I meant 4. It’s not collapsed so I’m suspecting it ate the cam lobe since I can’t think of another explanation. Going to inspect it next.

 

[wsteele]

Yes sorry I meant 4. It’s not collapsed so I’m suspecting it ate the cam lobe since I can’t think of another explanation. Going to inspect it next.

It definitely made the cam NG. Bummer, sorry for the bad news.