Vitara Pistons too sloppy? what about trying this?
03-01-2007, 07:05 PM
#12
1.5 BAR
Thread Starter
Join Date: Jul 2003
Posts: 890
Re: Vitara Pistons too sloppy? what about trying this?
Originally Posted by AbaZ
Throwing the pistons in a vise and squishing the pistons around
The pictures in my brother's book looks something like this. I'm sure machine shops have some special tool.... vice?
EDIT: Heres another pic i found of a Honda motorcycle piston. http://teamhansenhonda.com/parts/photo025.jpg
03-01-2007, 10:24 PM
#16
0.5 BAR
Join Date: Jun 2006
Posts: 65
Re: Vitara Pistons too sloppy? what about trying this?
Originally Posted by fork
how much slop is it. you can't build a motor by saying. eh that feels a little loose, you need to measure
03-02-2007, 12:27 AM
#17
1.0 BAR
Join Date: Mar 2005
Posts: 263
Re: Vitara Pistons too sloppy? what about trying this?
Talked to my boss (automotive machinist) about this today. I asked about the process, and he was like, where'd you read that? That's OLD news. He said back about 40 years ago, people used to do it because leaded gasoline helped the cyl's wear away more quickly. Doing this allowed the owner to run the block with a quick hone and re-ring, instead of a bore/hone job costing a bit more money and time. This was typically done on pistons with a full 360* skirt, not today's style skirt design, although it's possible to do.
He was sort of shocked that people were still talking about this process, since he was around rebuilding motors when they realized it was really not a good thing. He told me that I should stay away from this.
-josh-
He was sort of shocked that people were still talking about this process, since he was around rebuilding motors when they realized it was really not a good thing. He told me that I should stay away from this.
-josh-
03-02-2007, 01:10 AM
#18
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: Vitara Pistons too sloppy? what about trying this?
Originally Posted by AMkrew
Talked to my boss (automotive machinist) about this today. I asked about the process, and he was like, where'd you read that? That's OLD news. He said back about 40 years ago, people used to do it because leaded gasoline helped the cyl's wear away more quickly. Doing this allowed the owner to run the block with a quick hone and re-ring, instead of a bore/hone job costing a bit more money and time. This was typically done on pistons with a full 360* skirt, not today's style skirt design, although it's possible to do.
He was sort of shocked that people were still talking about this process, since he was around rebuilding motors when they realized it was really not a good thing. He told me that I should stay away from this.
Ill agree seems way ghetto
-josh-
He was sort of shocked that people were still talking about this process, since he was around rebuilding motors when they realized it was really not a good thing. He told me that I should stay away from this.
Ill agree seems way ghetto
-josh-
03-02-2007, 01:11 AM
#19
3.0 BAR
Join Date: May 2006
Posts: 1,967
Re: Vitara Pistons too sloppy? what about trying this?
yeah, I can see doing this on simpler older motors that hot rodders and such used to but I just don't know if I would trust knurled pistons in a modern motor.
like 90dx said, knurling is done on a lathe. It doesn't really cut any of the metal away, it actually forms or presses it to fit the shape of the knurling tool, although you do get some small shavings that come off on the tool bit. It's fairly easy to do if you have a good lathe and knurling tool.
That's basic knurling in a nutshell
like 90dx said, knurling is done on a lathe. It doesn't really cut any of the metal away, it actually forms or presses it to fit the shape of the knurling tool, although you do get some small shavings that come off on the tool bit. It's fairly easy to do if you have a good lathe and knurling tool.
That's basic knurling in a nutshell
03-02-2007, 02:00 AM
#20
3.0 BAR
Join Date: Jul 2004
Posts: 4,029
Re: Vitara Pistons too sloppy? what about trying this?
I did some knurling on some tools like a bearing puller i made etc and it is great for grip but i sure as ---- would not do it to a piston for a boosted motor.Knurling is def simple so if you wanted to try it the cost shouldnt be much it would probably be one hours labour say $50 roughly.
