FJ40 2F Inside Camera Probe View of Cyl #3… (1 Viewer)

[Ackcruisers]

What do you think about the crud at the top of the cylinder? Normal? Also, how about the scoring on the cylinder wall?

 

[Poser]

Crud?

Doesn't seem too bad; I have seen far worse.

I do not see 'scoring'. The cross-hatching looks to be in decent shape

There may be slight vertical marking at the 1 o'clock, but this vid did not focus on that.

 

[Living in the Past]

What was the reason for the video? Crud on the piston top should not effect compression. Rings/cylinder wall, valves/valve seats and head gasket effect compression in most cases.

 

[Ackcruisers]

Crud?

Doesn't seem too bad; I have seen far worse.

I do not see 'scoring'. The cross-hatching looks to be in decent shape

There may be slight vertical marking at the 1 o'clock, but this vid did not focus on that.

I was expecting to see a smooth piston top with only carbon deposits. The crud I was referring to is the brownish residue…

Thanks for clarifying the bore wall as “cross hatch“. That’s the scoring I saw.

I had no idea the bore was cross hatched with stone to get that texture so the steel rings can seat.

 

[Ackcruisers]

What was the reason for the video? Crud on the piston top should not affect compression. Rings/cylinder wall, valves/valve seats and head gasket affect compression in most cases.

The reason for video was two fold: First, I wanted to see if any coolant was entering cylinder after shut down as white smoke was coming out exhaust when engine first starts (did not smell sweet like coolant).. Second, I bought the camera probe for $19 and had to test it.

 

[Poser]

Cold start condensation.

Normal in non-arid climates.

 

[Spike Strip]

Looks like a normal engine with some miles on her.

 

[CruisinGA]

if you had coolant leaking in the piston top would probably look cleaner

 

[Ackcruisers]

if you had coolant leaking in the piston top would probably look cleaner

It would be steam cleaned! That’s what I was looking for.

 

[royal cake]

Those borescope are handy. I went through so much headache with my Tacoma and even paid the dealer to get the “right” diagnoses and they didn’t get it right. I finally broke down and bought and scope and right away saw puddles of red coolant sitting on top of the piston.