I lost compression in #2 cylinder and so I took a bore scope and looked inside. It almost looks like the walls have rust on them.
What do you think it is? I am concerned/perplexed
1999 xcv70 What is that on the Cylinder walls
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FLXC90
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I guess the first question is, how do the others look? numbers from your compression check?
Without better color/lighting I would say if it's not rust it's carbon deposits. Is that the edge of the piston top? picture down through plug hole? Aluminum piston won't rust, iron sleeve will. If you burned a valve, bits of it may have gotten loose in there. Is it just on that area of the cylinder, or all around the circumference?
How long have you had the car? Head gasket ever been done? Long period unused? I had a van that sat after losing a head gasket, and developed rust in a cylinder.( but it sat for about 2 years) Scored the walls pretty badly. Rust on cylinder walls and rings don't make great combo.
If it is carbon, maybe a dose of sea foam and let it sit a day or so to dissolve the deposits, the run it to purge?
Without better color/lighting I would say if it's not rust it's carbon deposits. Is that the edge of the piston top? picture down through plug hole? Aluminum piston won't rust, iron sleeve will. If you burned a valve, bits of it may have gotten loose in there. Is it just on that area of the cylinder, or all around the circumference?
How long have you had the car? Head gasket ever been done? Long period unused? I had a van that sat after losing a head gasket, and developed rust in a cylinder.( but it sat for about 2 years) Scored the walls pretty badly. Rust on cylinder walls and rings don't make great combo.
If it is carbon, maybe a dose of sea foam and let it sit a day or so to dissolve the deposits, the run it to purge?
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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Ozark Lee
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Of more concern to me are the scratch marks through the discoloration than the discoloration itself.
...Lee
...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe
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FLXC90
- Posts: 1132
- Joined: 18 August 2014
- Year and Model: 98 V70 T5
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https://www.matthewsvolvosite.com/forums ... =1&t=66757 he used your idea of borescoping, found a burnt exhaust valve. That may be scoring on your cylinder, if a valve disintegrated, pieces may have gotten in the ring/cylinder. Does your scope flex to where you can view the valves? If it doesn't have a control to turn, some sting around the base of the lens may work. GENTLY, maybe test before you put it down the hole.
Current Volvos:
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
1998 V70 T5, 112k sat 5 years, still in mechanical coma (finally at the top of the pile )
2004 XC90 T6 AWD: 186k, 60 on transaxle ( traded in )
1998 POS70 N/A: DD/training aid, 236k but really about 240k, I think...ABS module( passed on to son who sold it)
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