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Replace piston rings

I haven't done any work personally but a friend took my motor apart and found my piston rings needed replacing. Its been over 2 weeks and nothing has been done. so I would like to know what I have to do to do it myself.

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  • Saturn Master
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With friends like this.... If you seriously want to try it-I hope he laid everything out in an orderly way-my advice would be to buy a Haynes repair manual for your Saturn. There will be a section or chapter on engine rebuilding-read it thoroughly. Do not hesitate to consult friends or mechanics on any part or procedure you are not clear on. Engine assembly lube, a good torque wrench, acetone or brakleen- a good cleaner that leaves no residue, check out engine assembly videos on youtube, lots of rags and wipes-cleanliness of every part and fluid passage and threaded hole is absolutely essential...it's ok to give up on the engine-don't give up on the car, just swap in a used engine if it overwhelms you. Finally, give your friend a black eye, lol.
Good luck, buy the manual.

Posted on Jul 18, 2013

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Posted on Jan 02, 2017

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SOURCE: piston ring installation on 96 geo 1.3 liter 4 cyl engine.

If you are that deep into things you will do poorly without a good manual. Are the pistons new or used?If they are used you need to completly clean the ring grooves in the pistons or the new rings will stick and gall.Did you remove the ridge at the top of the cylinders? If not there is a good the top ring will either break or bust the upper land off of the piston. Hopefully you had a machine shop go through the block. Check the ring manufacture's web site. I am sure they will have tips and instructions.

Posted on Nov 29, 2008

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SOURCE: 2000 camry. blown head gasket (daughter drove car

Yes, you can, but not exactly recommended. If you are going to go that deep into it, then might as well do everything else. However, being unemployed tends to have a negative impact on the wallet....

I suspect it is more than just rings. I think that the walls have been scored badly as well. You may be able to use a borescope to take a peak into the cylinder through spark plug hole. Move the piston to bottom of stroke, and see what you can see. If scarred, much work will be needed. If hatches look alright, then you might be able to get away with just rings.

What kind of compression are you getting on #1 vs #2? This also might be a blown headgasket into an oil passage, or the head (perhaps block?) is ever so slightly warped in this area.

Posted on Aug 29, 2009

Testimonial: "Thanks for the quick response. Very much appreciated your input, all makes sense and got my mind on the right track again. Thanks"

philschneide
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The four round rubber seals are for the spark plug holes. They prevent oil under the valve cover from getting out around the spark plugs. If you pull a plug and find that it is particularly oil soaked (not the part that goes into the head, but the part that you put the plug wrench on to remove it), that will tell you that those seals are leaking.
Hope this answers your question, and is helpful.

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alicantecoli
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SOURCE: failed e test twice high NO ppm reading almost double

try changing the lambada sensor ,should be only one on this age vehicle but again i could be wrong if its a californian spec vehicle

Posted on Jun 05, 2010

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You don't replace just piston rings on a motor
with 15 years of cylinder & valve wear
The motor needs to be bored & completely
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Should never get involved with friends or
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Bummer. Usually you need to drop the oil pan, pull the rod and piston out, replace the sleeve, and use a ring comprssor to get the piston back into the cylinder and then put it all back together EXACTLY how it came apart including position on the sleeves, rods and bearings. I have not done this on a VW but I do not see this being much different than any other car that I have worked on. No matter what it will be a huge pain in the ***.

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The only way is to check the valve cam clearances. If they are correct then the valves will need reseating which means taking the head off and grinding them in or replace them if too burnt. If too tight the valves won't close properly. It could of course be worn piston rings. Pouring a small amount of engine oil in through the spark plug holes will show increased compression if it is piston ring issues.

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It could also be broken piston rings...but if your not burning or using oil, highly likely. The way to check wether it is piston rings or an exhaust valve is to put some oil(about 2 tablespons) into the effected cyclinder space by removing sparkplug and adding. **you must remove all sparkplug leads at this time to prevent it from "firing". If you then attatch a compression guage to the cyclinder, turn the engine over with the starter motor,noting the reading. If it is "broken rings" the compression will improve dramatically with engine turnover. If it stays the same the culprit is a burnt exhaust valve(s). This should ONLY be done by a competent person. Hope this helps

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IF YOU REPLACED THE HEADS WITH REBUILT/NEW HEADS:
A side effect of increasing compression when you bolt on fresh heads, is broken piston rings. It's beneficial to replace the rings & bearings and at least remove the ring ridge at the top of the cylinder wall if not re-bore when replacing heads due to the higher compression that will cause.


If you just put on a set of used heads.

There's also the chance that the new headgaskets didn't seal completely, (usually due to a problem with surface prep or a warped head/block), but if you've got high mileage, it's usually the rings.

A set of rings can be replaced, but you'll want to make sure they haven't cut into the bore so much as to cause blow-by once new rings are installed. Eliminating the ridge by carefully using a ridge reamer at the top of the cylinder to prevent breakage of the top ring from impact.
Hone the cylinder walls gently & reinstall pistons & new rings!
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Bad pistions on 94 buick centry 3.1l think engion stamp is g dont know if i have to put just pision in or rod assambly


It's rare that a piston goes bad. So, you need to determine why it failed.
Most times, the cylinder wall is damaged during a piston failure making it impossible to just replace the piston. Check the wall for score marks and out of round condition as well as actual size VS original bore size. (correcting that requires machine work) The new piston must match the cylinder bore as it is now, NOT what it was when manufactured. (same applies to rings).
The old rod can be re-used if it is not bent and providing that the big end (crank end) is still round. Again, the rod needs to be assembled by a machine shop as the wrist-pin is a press-in part.
Most times, you will find that the amount of actual work necessary to replace one piston exceeds what would be necessary to replace the engine in both time, $ and reliability.
If you want to try a replacement though, see if you can get a piston/rod assembly that is still in good condition from a blown junkyard engine, Plasti-gage the bearing and replace if necessary, clean out the ring grooves or replace the rings. Use a hand held cylinder hone and break the glaze on the cylinder walls. If you are careful and everything goes well, it MIGHT work.
Personally I would never replace pistons in an engine without doing all the necessary machine work though.

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As an engine wears the ring lands on the pistons wear also. In addition to ring land wearing on the piston, the bore in the cylinder develops a wear pattern. Has the engine been rebuilt?
If the pistons have worn ring lands and were re-used it may allow the rings (new or old) to twist in the grooves and catch on any ridge in the cylinder, thus breaking them.

When the engine is apart you must check for proper ring land wear. You need to consult the piston manufacturer for proper wear specs, typically around 0.006in.

If you're getting a visible amount of smoke/oil from the breather after the rebuild something is not right. The rings are not seating. I would definitely recommend boring/honing the cylinders and going with a new set of pistons/rings so you don't have to pull it apart again. A little more now can save a lot in the long-run.

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Any visible white smoke? If there is then the problem will be on the piston rings. If you haven't replaced the spark plugs yet then go for the replacement. If it's full of carbon the current will be block that's why it runs rough.

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