 Ring orientation |
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| timothy_nd28 |
 Jun 8 2012, 12:10 PM
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#1
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Advanced Member  Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest 
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1.8l engine with bigbore kit. Is there an up or down position for the piston rings? If so, what faces up?
Also, what should the gap be for these rings? |
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Replies(1 - 5)
| Valy |
Jun 8 2012, 03:53 PM
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#2
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Senior Member Group: Members Posts: 1,677 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
one side of the ring should be marked with "TOP" for compression rings only.
Oil ring is symmetrical. Check my rebuild thread in my signature for gaps. The stroke is irrelevant, just the diameter. You want the gap a bit bigger than the 94mm spec. |
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| timothy_nd28 |
Jun 10 2012, 11:37 PM
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#3
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Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest
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My kit has 8 piston compression rings, all of which were not gapped, super glad I checked before installing!
Of the 8 rings, 4 were marked with a tiny "top". The others had no markings anywhere, including the oil rings. I found a lawnmower repair website, which showed some pictures of the orientation. The ring marked top, does go on top, which happens to have the inside bevel facing up. The 2nd compression ring has the inside bevel facing down. The oil rings are symmetric and doesn't matter. I hope this website was correct, thanks again for the help. My car runs nice, and pulls pretty hard (IMG:style_emoticons/default/driving.gif) |
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| Jake Raby |
Jun 11 2012, 06:47 PM
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#4
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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 |
You were assuming the rings were gapped? In engine building the only assumptions that are correct are those that assume that something isn't right. Assume nothing, quantify everything .
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| euro911 |
Jun 11 2012, 07:15 PM
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#5
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California
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 Also, don't forget the orientation of each ring (compass headings, if you will) Install the top ring @ 1:00, 2nd ring @ 7:00, top oil ring @ 11:00 and bottom oil ring @ 5:00. |
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| a914622 |
Jun 11 2012, 09:44 PM
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#6
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Member Group: Members Posts: 316 Joined: 12-August 10 From: northwest Member No.: 12,048 Region Association: Pacific Northwest |
I have always put the champher to the top, But i just got a set of svx rings from Total seal and the top ring has no champher? I called and they said it can go in both ways.
I also check the ring inner dia against the piston ring seat dia. I got a set back in the day that was .010 smaller dia on the ring than the piston ring seat dia. jcl |
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