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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

ROCK Piston Rings..help

Old Sep 24, 2009 | 07:28 PM
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ROCK Piston Rings..help

For the oil rings spacer...do i just put it in there and butt it up against the other side? Do i need to overlap and some how put them together? im kind of confused...the old spacer had a fastener...
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Old Sep 24, 2009 | 07:50 PM
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just put it between the two flat RINGS(1 top 1 bottom) MAKE SURE THAT THE GAPS do not line up i SET MINE TOP 12 MIDDLE 3 BOTTOM 9 O'CLOCK like this

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Old Sep 24, 2009 | 08:00 PM
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ty.. so they just butt up together..thanks.
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Old Sep 24, 2009 | 08:36 PM
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like olharleyman said, clock the rings too. If you put the gap on the top ring towards the front of the engine (12 o'clock), put the second ring at 3 or 9, and the oil ring at 9 or 3 (opposite of #2 ring). You want around 120 degrees between the gaps in the rings if possible. 180 degree clocking is option and will seal better, but they won't last as long.
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Old Sep 24, 2009 | 09:38 PM
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one more question. Haynes manual says to put the second ring in after the oil ones...obviously..but it says to put the MARK facing UP. These rings dont have a mark on them.. theres writing on the rings around the ends though, saying Rock rings, std 1.5. Im assuming the writing just faces up?

Last edited by 9o7yota; Sep 24, 2009 at 09:40 PM.
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Old Sep 25, 2009 | 12:22 AM
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From: maryland
Ya the ROCK faces upward toward the valves big deal to get them facing correctly both top rings go ROCK facing upward and the same with these make sure to clock them opposite each other at the gaps.
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Old Sep 25, 2009 | 12:30 AM
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okay. perfect. thanks guys.
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Old Sep 25, 2009 | 12:43 AM
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Originally Posted by 9o7yota
okay. perfect. thanks guys.
Not a problem just did a full rebuild myself with only info from this site so if you need a hand feel free to ask.
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Old Sep 25, 2009 | 05:46 PM
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New question, ill keep it in this thread only because its still a part of the pistons but not the rings. On the caps for the connecting rods there are the spots to fit the lip of the bearing inserts. 3 of the rods i got back from the machine shop have the caps with 1 side being no lips, and the other side having both of them. 1 rod has the lip on either side...

basically...does it matter what way the bearings are inserted...should the lips be on opposite sides or on the same side... it looks like it almost should be put on the same side with the way it kind of lines up with another small notch.

-i would upload pics of it but im sooooo lazy.
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Old Sep 25, 2009 | 05:58 PM
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From: maryland
Originally Posted by 9o7yota
New question, ill keep it in this thread only because its still a part of the pistons but not the rings. On the caps for the connecting rods there are the spots to fit the lip of the bearing inserts. 3 of the rods i got back from the machine shop have the caps with 1 side being no lips, and the other side having both of them. 1 rod has the lip on either side...

basically...does it matter what way the bearings are inserted...should the lips be on opposite sides or on the same side... it looks like it almost should be put on the same side with the way it kind of lines up with another small notch.

-i would upload pics of it but im sooooo lazy.
Not really sure it matters as long as the oiling hole lines up my machinist did mine for me so he could check his work but I do believe the really important thing is that the two oiling holes in the connecting rod and the bushing line up correctly.

I hope that's what your talking about can't picture the CAPS and LIPS in my head because you and I may have different ideas of what your describing.
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Old Sep 25, 2009 | 06:04 PM
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lips as in... spots for the small lip on the bearing pieces..that lock it into place.

Edit: My haynes manual says to put the top ring at 7:30(clocking)...second ring 180 degrees out at 2:30.
then the oil rings top and bottom staggered at 4:30 and 10:30...

Ive read to do it 12 : 3 like you said... for longer ring life.

12 : 6 would be the same as 7:30 : 2:30 ... for quicker seating of the rings//shorter ring life... what is preferrable? should i go with the haynes or nott

Last edited by 9o7yota; Sep 25, 2009 at 06:23 PM.
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Old Sep 25, 2009 | 06:30 PM
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From: maryland
Originally Posted by 9o7yota
lips as in... spots for the small lip on the bearing pieces..that lock it into place.
OK see like I said your idea and mine might be different but now I think I got ya your talking about the bottom end correct where they mount on the crank? Like these pics show?




If you look close you can see mine do the same thing and I have not had an issue with it , once they are torqued to spec they are set and will be no problem as long as you don't have any clearance issue's with the crank
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Old Sep 25, 2009 | 06:36 PM
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From: maryland
Originally Posted by 9o7yota
lips as in... spots for the small lip on the bearing pieces..that lock it into place.

Edit: My haynes manual says to put the top ring at 7:30(clocking)...second ring 180 degrees out at 2:30.
then the oil rings top and bottom staggered at 4:30 and 10:30...

Ive read to do it 12 : 3 like you said... for longer ring life.

12 : 6 would be the same as 7:30 : 2:30 ... for quicker seating of the rings//shorter ring life... what is preferrable? should i go with the haynes or nott
I did mine 1/4 off 12 ,3 6, ect. each other like all the Harley motors I have built and had no problems with them my last motor(Harley) went 50k hard miles in 2 years with zero problems other then a base gasket so when I pulled the jugs to redo them I checked the pistons and rings and they still looked to be in good shape so now it's off to do another 50k. lol
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Old Sep 25, 2009 | 06:43 PM
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yeah ur pictures are the main bearings though.. Im talking about the rod bearings. The top part has an oil hole. so i know how that goes in obviously, but the bottom cap can be put on backwards...which is the right way..if there is one?
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Old Sep 25, 2009 | 06:45 PM
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ive already put my main bearings back together...i dont have the engine out of the truck though so i didnt get to make it as nice and clean and sweet as yours
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Old Sep 25, 2009 | 06:53 PM
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From: maryland
Originally Posted by 9o7yota
yeah ur pictures are the main bearings though.. Im talking about the rod bearings. The top part has an oil hole. so i know how that goes in obviously, but the bottom cap can be put on backwards...which is the right way..if there is one?
Damn thats the one picture I seem to have forgot to take but as I remember as long as the top one is correct there should be no difference to the bottom and I did mine so that the overhang/lip was least likely to stick out one side or the other.
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Old Sep 26, 2009 | 02:03 AM
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Originally Posted by olharleyman
Ya the ROCK faces upward toward the valves big deal to get them facing correctly both top rings go ROCK facing upward
Made that mistake
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Old Sep 28, 2009 | 12:28 PM
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haha, yeah...when i was putting in the rings 2 days ago i forgot to make sure i put the top ring on 2 of the pistons correctly...turns out i did but i still had to pull the pistons to double check. The caps actually turned out to have a correct way to face, with the mark facing forward...so harley, i hope you put your caps on correctly for the connecting rods
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Old Nov 24, 2009 | 04:33 AM
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Im putting new rings in and was hopping to get input on ring gap? I have a 22r and wanted to know what gaps are exceptable. Plus the ideal gap for the rings would be nice? Thanks

Last edited by The84toyota; Nov 29, 2009 at 11:17 AM.
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