Piston .060 ???

glxstang · 06-30-2002, 05:01 PM

After removing the heads I noticed the tops of the pistons are stamped with .060. Can someone let me know what this means has to what I have and regards to future upgrades.

Thanks again....

RPM427 · 06-30-2002, 05:49 PM

It probably means that the engine was bored .060 over when it was rebuilt. Thats the max you can bore the engine. If you ever get head gaskets, make sure they are for .060 overbored pistons.

PKRWUD · 06-30-2002, 05:59 PM

It means your engine is done.

Take care,
-Chris

glxstang · 06-30-2002, 06:13 PM

I was going to get some new performer heads and cam for it. Not worth it then?

PKRWUD · 06-30-2002, 06:34 PM

If it's still tight, sure, but if there is too much play, then no. Your block is at it's maximum bore, and cannot be overbored any farther.

Take care,
-Chris

glxstang · 06-30-2002, 06:54 PM

Chris, I'm sort of a beginner to working on engines....When you say "too much play". That is?

PKRWUD · 06-30-2002, 08:55 PM

You would have to take it apart and take some measurments. you would check the ring gap, and see how much it had grown, see how much side clearance the pistons had, see if the cylinders were very out of round, etc. usually you can clean that up by overboring .010" to .030", depending on how severe the wear is, but .060" is the limit for your block, plus that means it's been around the block a couple times already, and may have some stress fractures.

Take care,
-Chris

glxstang · 07-01-2002, 08:16 PM

What do ya think...

glxstang · 07-01-2002, 08:17 PM

one more ....

PKRWUD · 07-01-2002, 08:38 PM

I think your coolant/water mix had too much coolant in it, and the engine probably ran warm, but I have a hunch that's not what you're asking.

Do this: with the back of your fingernail, run up the cylinder wall, and feel how much the ridge at the top sticks out. If it sticks out enough to stop your finger, the block needs to be replaced. If the cylinder walls are so smooth that you can no longer see a cross pattern on them from the hone, then the block needs to be replaced.

Take care,
-Chris

06-30-2002, 05:01 PM	#1
glxstang Registered Member Join Date: Feb 2001 Location: Delray Beach, Florida Posts: 97	Piston .060 ??? After removing the heads I noticed the tops of the pistons are stamped with .060. Can someone let me know what this means has to what I have and regards to future upgrades. Thanks again....

06-30-2002, 05:49 PM	#2
RPM427 Registered Member Join Date: Aug 2001 Location: Huntington NY Posts: 573	It probably means that the engine was bored .060 over when it was rebuilt. Thats the max you can bore the engine. If you ever get head gaskets, make sure they are for .060 overbored pistons. __________________ -1993 Mustang, 900rwhp 03-04 cobra based 4v swap, full Griggs setup, project underway -1994 Ranger w/ 427cid windsor (daily beater) check it out!

06-30-2002, 05:59 PM	#3
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	It means your engine is done. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-30-2002, 06:34 PM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	If it's still tight, sure, but if there is too much play, then no. Your block is at it's maximum bore, and cannot be overbored any farther. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-30-2002, 08:55 PM	#7
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You would have to take it apart and take some measurments. you would check the ring gap, and see how much it had grown, see how much side clearance the pistons had, see if the cylinders were very out of round, etc. usually you can clean that up by overboring .010" to .030", depending on how severe the wear is, but .060" is the limit for your block, plus that means it's been around the block a couple times already, and may have some stress fractures. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

06-30-2002, 06:13 PM	#4
glxstang Registered Member Join Date: Feb 2001 Location: Delray Beach, Florida Posts: 97	I was going to get some new performer heads and cam for it. Not worth it then?

06-30-2002, 06:54 PM	#6
glxstang Registered Member Join Date: Feb 2001 Location: Delray Beach, Florida Posts: 97	Chris, I'm sort of a beginner to working on engines....When you say "too much play". That is?

07-01-2002, 08:38 PM	#10
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	I think your coolant/water mix had too much coolant in it, and the engine probably ran warm, but I have a hunch that's not what you're asking. Do this: with the back of your fingernail, run up the cylinder wall, and feel how much the ridge at the top sticks out. If it sticks out enough to stop your finger, the block needs to be replaced. If the cylinder walls are so smooth that you can no longer see a cross pattern on them from the hone, then the block needs to be replaced. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

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