Question about 2001 Hyundai Accent

2 Answers

Installed new piston rings and gas is getting inside oil

Hi i installed new piston rings and i also got my cylinder head rebuild. after complete installation of engine i started the car and it was running rough and jerking hard with no power when pressing the gas pedal. So i took the cylinder head off and found one of the valve not closing and all the valves was black. what is causing the car not to run smooth and leak gas in oil?? do you think it's the cylinder head since i have new rings installed.?? Please help

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  • Colin Stickland
    Colin Stickland Nov 15, 2014

    rings ? what you do is slip a ring into the bore and measure the gap after honing the bore of course but assuming all this is ok which i wouldnt lose sleep over ,take the head off again and i do feel you should be able to use the head gasket again and take the valves out yourself ,its easy to do not difficult ,put them in a electric drill and spin them up you will soon see if thay are bent or not ,right time to hit the old interweb thingy to see if i can find any software floating about for the old jam hars ,failing which i will try DC++ file sharing where of a weekend a lot of mechanics leave the firms computer on ---- and as i can key search their sharing files i often manage to get some dealer only software not that i can do a lot with it unless i can download the digital signature as well ,yes its complicated for a old dinasaur like myself but hey!!! its winter and the dark nights and all that

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  • Hyundai Master
  • 22,095 Answers

I think you have bent all the valves rebuilding the engine,possibly 14 valves out of the 16 valves are bent ,piston ring gaps are 4th per inch diameter of the piston so hope you got this right and the wear in the piston ring grooves wasnt excessive either ,but when fitting the head make sure all four pistons are level halfway down the bore before fitting the head then align the timings marks on the engine then turn the crank by hand to align the crank shaft mark and if its on the end by the flywheel then a spot of white paint on the front end so when your underneath you do not have to keep moving around checking the flywheel,All this damage you have done yourself although i will give you full marks for trying and commend you on this its just you need a bit more experiance modern day engines are all out of square with valve overlap unlike the old long stroke engines of yesteryear where you could start them with a starting handle .And the cars where made of metal and no IT university course on decrypting encoded software was needed .enough said rebuild the head and try again but full marks for trying

Posted on Nov 15, 2014

Testimonial: "Ok so the piston rings should be fine since they are new right? Just take the head back to the shop to be rebuild again.?"

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  • Hyundai Master
  • 40,710 Answers

Valve not closing is from a bent valve. Black soot is from over fuelling and incomplete combustion. Oily chamber is oil from the rings. It si possible that more than one valve is bent as it occurs from turning the engine over without letting of the rockers when adjusting the valve timing.

Posted on Nov 14, 2014

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Posted on Aug 18, 2014

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Piece of @#$%


I'm afraid the only advise I can give, is to overhaul the engine.

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When bearings are worn, this increases clearance between the bearing surface, and the object the bearing is installed on. Oil squirts out, and is thrown up on the cylinder walls, making it's way to be burned along with the fuel/air mixture.

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Audi 2.8 Avant burns oil


hi kieran,
ur problem is very easy to solve, but its an expensive fix..........($$$)

i dont know how much u know about cars, but every car with en engine(other than the Wankel) which has pistons......the pistons run in the cylinders of the engine block......at the top of the engine is where all the work is done, at the bottom part(just below the pistons), there is a lot of oil to lubricate all of the fast moving engine parts.....when a car burs oil what usually happens is that the oil goes up from the crank case, squesses between the piston and the cylinder walls and gets burned with the gas......and vise versa, at the power stroke the exhaust gasses enter the crankcase and slowly burn the oil that way.......so oil burns every 2 of the 4 strokes......there is 4 strokes in one rpm......idling is about 1500 rpm for ur audi....u do the math.......and the oil slowly burns........when the car heats up the oil burns even faster bacuse the temperature of the oil is already high.......
the pistons are equipped with piston rings to prevent oil from getting into the combustion chamber and exhaust gasses getting into the crankcase.......and the tolerance between the pston and the cylinder is also very important for the car not to burn oil......
tehre are a few ways to fix it.........the best and the most expensive would be to: bore out the cylinders, get new pistons (v6...) and get new rings, and u also might need to get the block and heads faced off(if there is any warpage....the heads are aluminum...).......
this process is called and engine rebuild and could cost u well over $2000 depending on what kind of quality u are looking for.......(its not worth it.....especially for this car, they are very cheap)...

the cheapest way to fix the problem about 75% would be just to get new piston rings.......but as soon as u take those heads off....shaving them is a must if they are warped.........and while u still have them off u might need to do the valves, which could also help the problem......and while u have the pistons out, might as well change them too...right???? so its spendy......

u might also have another problem,......a faulty gasket or o-ring, and the oil might be leaking from that faulty spot right on the exhaust, and might burn the oil that way...........that would defently explain the smell getting into the car.....if this is what is wrong, then the fix could be very easy, fast, and cheap...

if ur burning too much oil, it could be both of the problems at the same time.........plus a few more on top of that......

i hope this helps.........
....now if someone could only help me.......

i know u have posted this a while back, and probably have the problem fixed by now, but if this could help anyone else, then its not a usless waste of time......

a-vtec

sanya


Jan 03, 2009 | 1995 Audi 90

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