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Engine Specific Info and Questions => IDI Engine => Topic started by: paolomarks on September 08, 2012, 07:42:57 pm
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What grit ball hone should be used to deglaze my AAZ's bores. ? thanks paolo
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Ball Hone =No No..
Use a Bar Hone only.
And I'm old so I can't remember the grit, I think the last one I did I used 400.
I will admit though I really don't remember.
I have 3 sets for the Hone so confusion is easy.
Sent from my SGH-T879 using Tapatalk 2
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i learned in the engine shop that bar hone for final hone after a bore job...but ball hone for a rering...trust me ya wanna run the drill sort of slow...ive used m cordless dewalt on low,and pump that sucker up and down at the rate of about,well lemme describe: from the top to the bottom and back up within about 1 second...yes run the drill slower than you may think,and pump that sucker up and down rapidly like a crazy tug of war....perect 'hatch every time :)
i think i/we used 320 grit or thereabouts
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My bores are round and even and the cross hatch pattern is still visable from a rebuild 20,000 miles ago. I,m rebuilding again due to a thrown rod. New rings on the cylinders will need to be seated, so I figured a balll hone would be the ticket. So 320 grit is what to use? And what about a lubricating oil? THanks, paolo
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yea we used to use 320,and for oil we would have a bucket of diesel fuel to dip the hone into.and also a squirt bottle with diesel in it to keep it really wet when running the hone.wear nasty clothes cause it gets all over.do it outside if you can,no need polluting your shop with diesel stank...i like diesel too and will have been known to mix some in a drink every now and then but the lingering stink inside is no fun. :)
does anyone else put oil and vinegar on their salad using diesel and a nice balsamic?
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Just went through the process with a Flex-Hone ball hone. The mfr recommended the 3", 240 grit ball hone for my app. 30-45 sec per cyl @ 5-600 rpm did the trick. Make sure you wash, wash, wash the block when you are done or the lingering grit will eat your engine from the inside out.
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My bores are 80mm(3.149 inches) How exact does it need to be? Can I use the 3 inch hone? Is 240 grit preferable to 320 for diesels? I've heard that diesels need deeper hatchmarks. What do you think? Thanks, Paolo
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I cant remember but i know the tdi has chrome rings,cant remember the idi's
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I bought the 3 1/4" hone and it worked perfectly. The flex built into the hone has a lot of range. The 3" hone is slightly oversized, but I don`t know if it would be enough to get a good bite.
I also used the 240 or so grit but really wished i`d have gotten something more aggressive .. I feel the extra oiling provided by a deeper cross hatch would have been OK.
I drove my engine about 7500 miles after the ring job and it had excellent compression the entire time (3 checks during the time).
Also worth noting that my replacement rings gap was barely within spec, possibly as little as .001" from being too large for Bentley to be happy ... i`m sure a rebore would have been better.
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I did the ball hone recently myself. My parts guy somehow sent me one way too large, so I called Flex-Hone's tech support for their recommendation for my 1.6: they said 3", 240 grit. I questioned the diameter, they said "3 inch" is the cylinder size it's recommended for, the actual diameter is oversized for proper bite. Worked OK for me, though time and mileage will tell...
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I bought the 3 1/4" hone and it worked perfectly. The flex built into the hone has a lot of range. The 3" hone is slightly oversized, but I don`t know if it would be enough to get a good bite.
I also used the 240 or so grit but really wished i`d have gotten something more aggressive .. I feel the extra oiling provided by a deeper cross hatch would have been OK.
I drove my engine about 7500 miles after the ring job and it had excellent compression the entire time (3 checks during the time).
Also worth noting that my replacement rings gap was barely within spec, possibly as little as .001" from being too large for Bentley to be happy ... i`m sure a rebore would have been better.
so, now, being set in the engine, the rings are likely out of spec..
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I asked my machinist he suggested 3.25 so that's what I bought