Author Topic: Cylinder pics - verdict?  (Read 3281 times)

Jowe

  • Full Member
  • Silver
  • ****
  • Sweden, Västra Götaland, Gothenburg
  • Posts: 280
Cylinder pics - verdict?
« on: March 17, 2016, 07:21:01 »
I've bought a cheap endoscope inspection camera and here are my first shots in the cylinders. I also opened the oil filler cap and shot the first cam lobes. Any verdict about the cylinder and cam condition based on these pics? NGK BP7ES plugs. #1 is wet. Leaking injector?
Johan
04/1964 230SL, European, manual 4-sp, power steering, 050/050 white, black leather, Blaupunkt (SOLD)

Jowe

  • Full Member
  • Silver
  • ****
  • Sweden, Västra Götaland, Gothenburg
  • Posts: 280
Re: Cylinder pics - verdict?
« Reply #1 on: March 17, 2016, 07:22:03 »
Final pics...
Johan
04/1964 230SL, European, manual 4-sp, power steering, 050/050 white, black leather, Blaupunkt (SOLD)

Tyler S

  • Associate Member
  • Platinum
  • ******
  • USA, CA, Encinitas
  • Posts: 1613
Re: Cylinder pics - verdict?
« Reply #2 on: March 17, 2016, 15:04:48 »
Looks like you can still see the cylinder wall cross hatch in cylinder 5. Cylinder 1 looks excessively clean. The plug being "wet", are you sure its fuel and not coolant? The rest look in good shape. Yes you may want to check the fuel injectors for leakage and holding pressure. The cam lobes look ok but the 2 wear mark strips down the middle of one look questionable. It could just be the picture though. Bore scopes can produce weird shadows that aren't really there. Pulling the valve cover is easy and will allow you to check your valve adjustment clearance and grt a better look at all cam lobes.
Tyler
1968 (67) 250sl. 4 speed manual. DB180 Silver
1955 220 Cabriolet A. White Grey
2019 E450 Wagon. Majestic Blue
1936 Ford PU Flathead V8. Creme on tan interior.
1989 Volkswagen T3 Westfailia Campmobile. Dove Grey (blue)

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7414
Re: Cylinder pics - verdict?
« Reply #3 on: March 18, 2016, 05:11:44 »
Make sure your spark plug wire ends and plug wires are up to specs.  Lack of spark will leave unburned fluids in the combustion chambers.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Shvegel

  • Inactive
  • Platinum
  • ******
  • USA, OH, Cleveland Heights
  • Posts: 2978
Re: Cylinder pics - verdict?
« Reply #4 on: March 18, 2016, 16:50:42 »
#1 is a little concerning.  Clean edges of the piston crown usually mean(to me) that the rings are allowing oil in vapor form to enter around the piston walls.  When the piston travels down the oil vapors blow by the rings and swirl up  around the piston crown and clean the piston edges. Verify spark and fuel the I would perform a cylinder leak down test both dry and with a small amount of oil in the cylinder.  If the leak down test shows better readings after adding the oil you have leaky rings on that 1 hole.

Jowe

  • Full Member
  • Silver
  • ****
  • Sweden, Västra Götaland, Gothenburg
  • Posts: 280
Re: Cylinder pics - verdict?
« Reply #5 on: March 18, 2016, 19:08:50 »
Thank's for the suggestions. I suspect the #1 as well. I will do a leak down test as propsed. I will adjust the valves nextcoming week so I will also inspect the cam shaft etc. Stay tuned...
Johan
04/1964 230SL, European, manual 4-sp, power steering, 050/050 white, black leather, Blaupunkt (SOLD)