Piston ring gap sizes
07-23-2007, 12:29 AM
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Piston ring gap sizes
I know there are tons of people that has replaced pistons. Soooo.....What has everyone gapped their rings to? I gapped mine at .026=top and .023=bottom. I had Diamond 10.0:1 at the time. Now that I'm rebuilding my engine I want to make sure the ring sizes are right. I have all the tools to do the job but..... I can't find any solid guide for ring gap sizes.
BTW what is the stack gap size
BTW what is the stack gap size
Last edited by M88ArRamadi; 07-23-2007 at 12:53 AM. Reason: Sofa King Reta-Ted
07-23-2007, 11:52 AM
#2
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Bill, these are straight from the manual:
Top compression ring end gap 0.20 - 0.40mm (0.0060 - 0.015in)
Second compression ring end gap 0.35 - 0.55mm (0.0137 - 0.0216in)
Oil ring end gap 0.25 - 0.76mm (0.0098 - 0.029in)
Top compression ring end gap 0.20 - 0.40mm (0.0060 - 0.015in)
Second compression ring end gap 0.35 - 0.55mm (0.0137 - 0.0216in)
Oil ring end gap 0.25 - 0.76mm (0.0098 - 0.029in)
07-24-2007, 05:27 PM
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bump for curiousity. also im looking into doing internals along with a head would you recomend keeping the stock compression of 9.5 or going up to the 10.0 pros and cons of both would be great. i would really like to hear from either one of you since i know both of you are currently doing builds
07-25-2007, 02:02 AM
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bump for curiousity. also im looking into doing internals along with a head would you recomend keeping the stock compression of 9.5 or going up to the 10.0 pros and cons of both would be great. i would really like to hear from either one of you since i know both of you are currently doing builds
When you put your new pistons in....you didn't have you block honed? If you did.....pre-gapped rings are useless.
Last edited by M88ArRamadi; 07-25-2007 at 02:02 AM. Reason: Automerged Doublepost
07-26-2007, 12:53 PM
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Alright I just got off the phone with Diamond....they recommend .020 Top and .022 Bottom gaps.
Equasion is:
0.060 X Bore Size(in)
Hopefully this info helps someone else out too
Equasion is:
0.060 X Bore Size(in)
Hopefully this info helps someone else out too
02-23-2009, 06:28 PM
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Bringing this back from the dead to get more input from anyone that has swapped pistons.
Diamond recommended to me a .016 top gap and a .018 second ring gap. I myself was going to use a .018 and a .020.
Diamond recommended to me a .016 top gap and a .018 second ring gap. I myself was going to use a .018 and a .020.
03-13-2009, 05:14 PM
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LSX RWD S/C conversion
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I hear people talking about ring gapping but no one mentioning that Diamond has very specific honing requirements for using their pistons. These requirements are given when you buy their pistons.
The shop doing the DD rebuild had to call Diamond tech dept to get them and hand honing does not fall within their specifications.
The shop doing the DD rebuild had to call Diamond tech dept to get them and hand honing does not fall within their specifications.
03-15-2009, 04:19 PM
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when i called em and told em i was doing a "hand honing" they recommended against it cause the mi my car was at and recommended a platue brush with a six stroke on low setting of the drill... it simply removes any glazing that can be present due to oil burn-off...
i had 18xxx mi on my block...
my leakdown and compression number are real real tight... i have heard from witt when guys just slap the pistons in without honing or nothing, then they can get excessive crank case pressure and will sometimes blow out the dip stick...
using plateue brush/honing brush 400 grit replicate cross hatching
inspect old piston for possible sale.
after 5 min of begging let your immature buddy draw **** and dicks on them ruining all chances of sale
this is the brush i used you can pick it up at goodson.com
i had 18xxx mi on my block...
my leakdown and compression number are real real tight... i have heard from witt when guys just slap the pistons in without honing or nothing, then they can get excessive crank case pressure and will sometimes blow out the dip stick...
using plateue brush/honing brush 400 grit replicate cross hatching
inspect old piston for possible sale.
after 5 min of begging let your immature buddy draw **** and dicks on them ruining all chances of sale
this is the brush i used you can pick it up at goodson.com
03-15-2009, 04:36 PM
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My sleeves only have about 3,000 miles on them but I was still going to rehone them using a flexhone tool and drill.
I searched goodson.com for that tool, couldn't find it. Possibly have a link?
I searched goodson.com for that tool, couldn't find it. Possibly have a link?
03-15-2009, 04:53 PM
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yeah if i were you i would not hone just use the brush it worked great... and you have less chance of taking off any material.
http://goodson.com/store/template/pr...a3cad3e14088e7
http://goodson.com/store/template/pr...a3cad3e14088e7
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