Oh no....Grooves in my cylinder wall!!!!

DZEE'S LX · 02-12-2002, 10:28 PM

I hate it when this happens.

Got the new heads on (loose) last night and all I had to do tonight is put the bolts in and torque.
Realized that I might not have tapped all the block threads on passenger side so I pulled the head to check - and there it caught my eye....

A couple 1/2 inch long grooves in cyl #2. They are shallow - can't catch a nail on them but you can still feel them. They start about 1/4 inch from the top of the shiney marks on the wall, get gradually deeper, and then taper back to smooth. They are both the same length and about 1/2 apart.

All other cylinders look great - yes, I checked the other side too.

I'm afraid of the proper fix - no way I'm gonna do any major work at this point of time......

What do I do?
Leave them?
Can I polish them a little?

Help!

Dan

gtsr515 · 02-12-2002, 10:34 PM

No prob yet bud, relax a little and tell me this, how far from the top of the block is the very beginning of the score to the end of it going down tward the block, lets start there and respond, built 51 302's as of last week.

DZEE'S LX · 02-12-2002, 10:47 PM

Don't worry, I'm not that excited - just dissapointed that I could have run into a problem. I'm just asking for help from experienced people.

Starts a little less than 1/2 inch down from the top.

I mentioned that it starts below the top of the shiney part meaning that it starts below the top of the (ring) wear surface in the wall.

PKRWUD · 02-15-2002, 04:27 AM

Where in the cylinder are they? If the cylinder was a clock, and the front of the engine represented 3 oclock, where are the marks?

DZEE'S LX · 02-15-2002, 11:36 AM

They are aprox 6:00.

To explain it another way, as you look down at the block while standing at the passenger tire, they are at the outboard side of the cylinder.

Hope that makes sense.

Dan

PKRWUD · 02-15-2002, 01:42 PM

Well, that rules out a piston pin problem!

Sounds like your 2nd comp. ring is broken. Don't stress it now, but I'll be willing to bet that the outside skirt on the #2 piston will have hairline cracks by the time it gets pulled.

Dark_5.0 · 02-15-2002, 01:59 PM

Quote:

Originally posted by PKRWUD
Well, that rules out a piston pin problem!

Sounds like your 2nd comp. ring is broken. Don't stress it now, but I'll be willing to bet that the outside skirt on the #2 piston will have hairline cracks by the time it gets pulled.

Wow hows that for a reply, tells ypu and shows you whats wrong.

Nice

DZEE'S LX · 02-15-2002, 07:41 PM

Thanks for the pics.
If it were a broken ring wouldn't the grooves go the lenth of the stroke? Right now the grooves are about a 1/2 inch long.

PKRWUD · 02-16-2002, 06:41 AM

Not necessarily. The cylinder gets wider the farther down you go, plus the first inch the piston travels sees the most outward force. After that, the energy is directed down. You said the marks weren't deep enough to catch a nail on, so they're young. As time goes on, the grooves should lengthen, but it also depends on what the ring looks like. How many miles are on the short block? Did it recently see nitrous or a blower? Why are you swapping heads?

DZEE'S LX · 02-16-2002, 05:25 PM

150k on the stock block.

Always been N/A

Why the heads? In search of more ponies

. They are just part of my overall upgrade. Someday I'll do the whole motor.

Dan

02-12-2002, 10:28 PM	#1
DZEE'S LX Registered Member Join Date: Jan 2001 Location: Salt Lake City Posts: 117	Oh no....Grooves in my cylinder wall!!!! I hate it when this happens. Got the new heads on (loose) last night and all I had to do tonight is put the bolts in and torque. Realized that I might not have tapped all the block threads on passenger side so I pulled the head to check - and there it caught my eye.... A couple 1/2 inch long grooves in cyl #2. They are shallow - can't catch a nail on them but you can still feel them. They start about 1/4 inch from the top of the shiney marks on the wall, get gradually deeper, and then taper back to smooth. They are both the same length and about 1/2 apart. All other cylinders look great - yes, I checked the other side too. I'm afraid of the proper fix - no way I'm gonna do any major work at this point of time...... What do I do? Leave them? Can I polish them a little? Help! Dan __________________ Spec Service (UHP), BFG G-Force KDW's, Turbo Coupe 3.55 rear w/disks, 73mm calipers, Stg 1 Twisted Wedges, TFS Street Intake, 70mm TB, E cam, Crane 1.7's, Aeromotive FPR, BBK 1 5/8 shorties, elec fan, FMS Al Radiator, Moroso Wires, Kenne Bell Ramair, March pulleys, Race Magnums, 190 lph Walbro, FMS Al Dshaft, D/S loop, MM 4point rollbar, FMS C spngs, strut tower brace, Tokico Illuminas, Prothane bushings, MM Lwr Conrol Arms, KB welded subs, Cervini Mach 1 hood/valence/side skirts/wing/airdam.

02-12-2002, 10:47 PM	#3
DZEE'S LX Registered Member Join Date: Jan 2001 Location: Salt Lake City Posts: 117	Don't worry, I'm not that excited - just dissapointed that I could have run into a problem. I'm just asking for help from experienced people. Starts a little less than 1/2 inch down from the top. I mentioned that it starts below the top of the shiney part meaning that it starts below the top of the (ring) wear surface in the wall. __________________ Spec Service (UHP), BFG G-Force KDW's, Turbo Coupe 3.55 rear w/disks, 73mm calipers, Stg 1 Twisted Wedges, TFS Street Intake, 70mm TB, E cam, Crane 1.7's, Aeromotive FPR, BBK 1 5/8 shorties, elec fan, FMS Al Radiator, Moroso Wires, Kenne Bell Ramair, March pulleys, Race Magnums, 190 lph Walbro, FMS Al Dshaft, D/S loop, MM 4point rollbar, FMS C spngs, strut tower brace, Tokico Illuminas, Prothane bushings, MM Lwr Conrol Arms, KB welded subs, Cervini Mach 1 hood/valence/side skirts/wing/airdam.

02-15-2002, 04:27 AM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Where in the cylinder are they? If the cylinder was a clock, and the front of the engine represented 3 oclock, where are the marks? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-15-2002, 01:42 PM	#6
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Well, that rules out a piston pin problem! Sounds like your 2nd comp. ring is broken. Don't stress it now, but I'll be willing to bet that the outside skirt on the #2 piston will have hairline cracks by the time it gets pulled. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-16-2002, 06:41 AM	#9
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Not necessarily. The cylinder gets wider the farther down you go, plus the first inch the piston travels sees the most outward force. After that, the energy is directed down. You said the marks weren't deep enough to catch a nail on, so they're young. As time goes on, the grooves should lengthen, but it also depends on what the ring looks like. How many miles are on the short block? Did it recently see nitrous or a blower? Why are you swapping heads? __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

02-12-2002, 10:34 PM	#2
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	No prob yet bud, relax a little and tell me this, how far from the top of the block is the very beginning of the score to the end of it going down tward the block, lets start there and respond, built 51 302's as of last week. __________________ Remember...2nd place is 1st place for losers!

02-15-2002, 11:36 AM	#5
DZEE'S LX Registered Member Join Date: Jan 2001 Location: Salt Lake City Posts: 117	They are aprox 6:00. To explain it another way, as you look down at the block while standing at the passenger tire, they are at the outboard side of the cylinder. Hope that makes sense. Dan

02-15-2002, 07:41 PM	#8
DZEE'S LX Registered Member Join Date: Jan 2001 Location: Salt Lake City Posts: 117	Thanks for the pics. If it were a broken ring wouldn't the grooves go the lenth of the stroke? Right now the grooves are about a 1/2 inch long.

02-16-2002, 05:25 PM	#10
DZEE'S LX Registered Member Join Date: Jan 2001 Location: Salt Lake City Posts: 117	150k on the stock block. Always been N/A Why the heads? In search of more ponies. They are just part of my overall upgrade. Someday I'll do the whole motor. Dan __________________ Spec Service (UHP), BFG G-Force KDW's, Turbo Coupe 3.55 rear w/disks, 73mm calipers, Stg 1 Twisted Wedges, TFS Street Intake, 70mm TB, E cam, Crane 1.7's, Aeromotive FPR, BBK 1 5/8 shorties, elec fan, FMS Al Radiator, Moroso Wires, Kenne Bell Ramair, March pulleys, Race Magnums, 190 lph Walbro, FMS Al Dshaft, D/S loop, MM 4point rollbar, FMS C spngs, strut tower brace, Tokico Illuminas, Prothane bushings, MM Lwr Conrol Arms, KB welded subs, Cervini Mach 1 hood/valence/side skirts/wing/airdam.

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