 Motor is tight when turning by hand |
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| Jake Raby |
 Nov 9 2004, 09:34 AM
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#41
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Engine Surgeon  Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States  |
At their biggest point, which varys..
Grab a mike and start measuring. |
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| swood |
Nov 9 2004, 10:12 AM
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#42
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
Biggest point...meaning...the widest part of the skirt? compared to what, the ID of the top or bottom of the cylinder?
And what should the clearance be at one or both of those locations? Aren't we talking about the clearance between the widest point on the piston to the narrowest point on the cylinder? |
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| Jake Raby |
Nov 9 2004, 01:26 PM
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#43
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
If the cylinder is honed correctly it will have no taper and will be round no matter where it is measured. Junk cylinders are not..
The widest point on the skirt is where to measure. Normally found toward the bottom of the skirt on a KB, but they vary.. The measurement you will see should be around 3.7785 Want you guys be glad when you can buy these parts with no guesswork and just drop them right in????? |
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| swood |
Nov 9 2004, 01:40 PM
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#44
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
3.778 - That is exactly what the skirts were. I even mic'd them myself when I got them back.
So if the cylinder ID is 96mm...that should give .002" right? |
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| swood |
Nov 10 2004, 07:15 AM
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#45
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
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| Jake Raby |
Nov 10 2004, 09:56 AM
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#46
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
But you measured them at the wrong place!
Trust me, the bottom corners of those skirts are wider than the area you measured. You cannot go on the spec from the machine shop on the cylinders! You must either use a big snap gauge, or a bore gauge to measure the ID of the cylinder.... |
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| swood |
Nov 17 2004, 10:53 PM
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#47
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
Alright...got the P&C's off again. (IMG:style_emoticons/default/headbang.gif)
Good news is that I put the flywheel on and some paper towels under the ends of the rods and the crank ass'y spins nice and smooth. I took out the 3 spacers under the flywheel and I've got .040" or so play. I'll re measure with the 2 spacers to see what I got. Going to Rimco tomorrow to recheck and have them check the boring of the cylinders and the skirt clearance on the KB 96mm's. I'm not sure what it should be or where to check it but I"m sure they can figure it out. What should the gap be on the piston rings? |
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| swood |
Nov 18 2004, 03:53 PM
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#48
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
Ok. Got them mic'd and the skirt clearance is uniform for all 4 jup&c's a little over .003". So the skirt wasn't too tight, I think it was just the rings.
Anyone know what the gap should be so I can double check that when I re-re-assemble tonight? They're Hastings. I'm thinking it's .0035" per inch of bore. Measured loaded at the bottom end of the jug. Sound right? |
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| swood |
Nov 18 2004, 10:17 PM
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#49
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
Oh yeah, does anyone know where to get the flywheel shims in different sizes? I'm not sure I've got enough play with the three stock ones.
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| swood |
Nov 20 2004, 06:22 PM
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#50
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
(IMG:style_emoticons/default/icon_bump.gif)
What's the limit on how many times you can respond to your own thread continuously?? Is there a record? (IMG:style_emoticons/default/chairfall.gif) |
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| redshift |
Nov 20 2004, 06:30 PM
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#51
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
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| swood |
Nov 20 2004, 06:41 PM
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#52
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
LOSER ALERT!! LOSER ALERT!!
I did get a big compressor today though. 6.5 hp 60 gal. Buzz Buzz. (IMG:style_emoticons/default/mueba.gif) |
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| skline |
Nov 20 2004, 08:24 PM
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#53
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Born to Drive Group: Members Posts: 7,910 Joined: 26-December 02 From: Costa Mesa, CA Member No.: 17 Region Association: Southern California |
I have some of them spacers if you want them, I have no use for them and there are 3 different sizes. You can mix and match to get the desired results.
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| swood |
Nov 20 2004, 08:35 PM
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#54
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Senior Member Group: Members Posts: 1,839 Joined: 6-February 03 From: Strong Beach Member No.: 251 Region Association: None |
QUOTE(skline @ Nov 20 2004, 06:24 PM) I have some of them spacers if you want them, I have no use for them and there are 3 different sizes. You can mix and match to get the desired results. Hey Scott thats cool thanks. I'll take you up on that. |
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