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Thread: Mercury 1994 2.0L 150
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03-20-2018, 11:07 PM #46
Yes on the bolts - I do reuse them. I apply 1 drop of Red Loctite to the threads of the rod/cap bolts and follow the torque steps mentioned after being absolutely sure the caps are aligned. A word of caution, I pulled/destroyed all of the threads out of a motorcycle engine's right case and then my jetski pump by using Red in aluminum threaded holes. Only use Red when it steel to steel and you don't plan to take it apart any time soon. Keep it away from soft aluminum - it is tougher than the threads are and your bolts will have a layer of aluminum when you try to remove them. I learned what and how to use Timeserts to fix my mess.
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03-21-2018, 06:22 AM #47
Some heat applied to "dreaded red" will allow removal of fastener without thread damage.
James H. W2F a V-King... Want 2 Fly a V-King
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03-21-2018, 07:26 AM #48
Technically speaking, not supposed to reuse bolts, because they are a torque to yield design. Buuut, you won't have any problems reusing them from my experience in a stock application. If hot roddin go to SPS or ARP non torque to yield type bolts. When reusing them torque them at 30 ft/lb and that's it, no additional rotations. If you use new bolts, then do the additional rotation as described in manual. Reason being, the bolts have already been tightened beyond there elastic stage near their yield point once and likely will not be able to take that additional rotation again before giving up the ghost.
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03-24-2018, 11:33 AM #495000 RPM
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Thanks... Think I got it:
1) Use a drop of red locktite
2) Make sure the cap is aligned
3) Torque in increments (e.g. start with around 10 ft/lbs)
4) Final torque to 30 ft/lbs (if reusing the bolts)
5) NO final 90 degree twist (if reusing the bolts)
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03-24-2018, 12:32 PM #50
There are two red Loctites. 262, permanent, and 271, high strength. Use the 271.
RockTeam Junk
No sparkling wiggles in here, only dump truck grinches.
"Screamin Heathen"
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03-24-2018, 05:50 PM #51
Rod bolts are like $2.00 a piece. Don't reuse them.
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03-24-2018, 08:09 PM #52
Uhhh, $5.80, but who's counting?
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03-26-2018, 09:24 PM #535000 RPM
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Took out wrist pin of #3 piston to put in a new piston kit. I count 29 needs bearing. I don't think I dropped any. Is that the correct number?
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03-26-2018, 10:48 PM #54
Yep 29. Shouldn't have any room to put another in rod when all in place, should fill all the space up.
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03-28-2018, 12:56 PM #555000 RPM
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Just noticed that the new piston pin is a bit tight in the new piston. I can get it in by rapping it, but that won't work when trying to put the needle bearings in. Should I loosen it up with emery cloth or by just working the pin back and forth and turning it inside the piston? There are no obvious bad edges.
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03-28-2018, 02:25 PM #56
Try putting the pin in the freezer. It will shrink and it should slide right in...
Josh Peterson
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03-30-2018, 08:07 AM #575000 RPM
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Good idea, didn't think of that. So I tried it; it helped a little but still too tight as I'll still have to rap it to get it in and am concerned about needle bearings going all over the place.
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03-30-2018, 08:15 AM #58
Sumpin ain't right. Got a bur, been dropped on its head, machined cross-eyed or sumpin. Generally new piston and pins will easily glide in, kinda normal for used ones due to build up that would have to be cleaned and dressed up to move freely again.
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03-30-2018, 08:18 AM #59
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03-31-2018, 02:58 PM #605000 RPM
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It probably does make sense to go back to the vendor on this, although thought I’d give this a shot: some 1500 grit then 2000 grit paper inside the hole. Then washed it out good with soap and water and then gave it a dousing of WD40. It seemed to work OK.
Got the (29) needle bearings back in place now. Used the grease method (i.e. using Lubriplate #105 Motor Assembly Grease). I might have tried the dry method, but I don’t have a spacer or a lathe/machine to cut one from the old pin in order to attempt it. The grease seemed to work fine, although I can’t say that this was one of my favorite things to do, thinking I might forget or lose one of those tiny needles with my clumsy fingers. Probably 30 years ago my fingers were not so clumsy.
Now for the wrist pin retainers. I shot one somewhere on my back patio. If not for the leaves and other yard debris around I might have had a chance to find it. Guess I’ll have to use an old one. Also, I wonder if there is a good tool to help with these clips. To me it seems hopeless using a screwdriver without scarfing up the piston or my fingers.
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