Question about 1995 Toyota Tercel

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Excessive oil compsution engine has good compression all cyc. ck. appx. 180 lbs. could this be bad valve guides or seals? the engine runs very smooth has 150 thousand miles on it smokes a lot when cold & smokes much less after warming up

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Oil Rings time for rebuild

Posted on Aug 24, 2010


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Oil leaking on spark plug

If the spark plug is oil fouled, you either have leaking valve seals, or bad piston rings. Bad rings would be accompanied by excessive blow-by. With the engine running, remove your oil filler cap. If there is air pulsing out of the filler tube, it your rings. If not, it is your valve seals.

Jun 15, 2016 | Cars & Trucks

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1988 suzuki samurai . checked compression # 1 180 # 2 140 #3 180 #4 180. #4 plug was gummed up. Engine sounds good.could it be valve stem seals or head gasket.Has 2 barrel carb.and header smokes bad

the compression is not bad however #2 is a bit low. what did the plug look like on #4. was it oily in appearance or chalky white. if it has an oily appearance then that cylinder is burning oil. it could be valve seals or valve guide clearance is too much or oil rings for that cylinder. the other colour is carbon meaning the cylinder is not burning properly. could be a weak ignition component that affects that cylinder or the cylinder has a lot of carbon build up in it. if it was white in colour then your burning coolant. not sure what you mean by header smokes bad, do you mean at the head if so then you may have something leaking onto it and its burning off.

May 03, 2015 | 1988 Suzuki Samurai

1 Answer

2012 250 etec. Excess oil coming out of the exhaust ports

Run the engine for several minutes at idle. Turn the engine off and let it sit for about 15 minutes. Restart the engine and immediately increase the engine speed while observing the exhaust. If a heavy billow of bluish smoke is exhausted then disappears and the exhaust remains relatively clean, the most likely cause is excessive valve guide wear. In this case, the valve guides or valve guide seals require service. If the above test only produces mild smoke and the smoke remains at the same level during all operating conditions, the piston rings will have to be tested. This is done by performing a compression test on the engine. The first test is referred to as a "dry test" and the second test is referred to as a "wet test". The dry test consists of measuring the engines compression using a compression tester installed in the spark plug hole and the ignition system disabled. The engine is then cranked and the pressure is measured and recorded. A few teaspoons full of oil is then poured into the spark plug hole and the compression is then measured again. If the reading increases more than 15 PSI, the rings are worn and major engine service is probably required.

Apr 12, 2012 | Cars & Trucks

1 Answer

Oil in #1 spark plug tube, plug wire popped off changed valve cover gasket and the upper tube seals. It ran fine for about an hour then started missing again

Was the plug fouled again after you made repairs? Did you install a new plug and run it? If the plug itself is fouling you probably also see blue smoke in the exhaust pipe. Get the engine warm, check compression and do what is called a cylinder leakage test, it puts a volume of air into each cylinder with the valves closed and how much air leaks out determines the over all health of the engine. Does the engine have excess oil consumption? The oil entering the cylinder and fouling the plug can enter from a worn valve guide or guide seal, a worn or damaged oil control piston ring or a worn or damaged piston bore or piston, none of which are going to be inexpensive to fix.

Good luck, i hope this helps.

Jul 01, 2011 | 1995 Honda Accord

2 Answers

Excessive oil burning

bad piston rings or a gasket is blown - try a compression test on the cylinders
Best regards

Mar 06, 2011 | 2002 Nissan Altima

1 Answer

Just had head gasket done escort van 55 still burning oil

Hello, there are many reasons for an engine to burn oil. Replacing a head gasket will stop leaks in the head, but it is not a cure all. You can have bad compression, bad oil rings, and valve guides that are worn. A new head gasket can fix compression leaks between cylinders and oil and antifreeze leaks.

Overall bad compression means both the oil rings and power rings are worn out. You can have bad oil rings and still run reasonable well if the power rings are okay. The valve guides are the small seals on the stems and with an overhead cam they are in the heart of the engine. Sometimes when the valley of an engine is plugged up, the oil can not return to the crankcase fast enough. The pooling oil is more apt to lay by the valve stem seals and be drawn into the combustion chamber.

Also check the PCV valve which may snorkel up oil into the induction system. Another sign of bad rings is blowby on the vent pipe.

Jan 20, 2011 | 1998 Ford Escort

1 Answer

Oil in coolant system and all over under carriage and engine.

it seems there are some o-rings or seals which leak oil into the cooling system via the oil cooler. its a common problem. you can do a compression test, al cylinders should be 130lbs or better. then re try the test but add 1/2 ounce of oil to the sparkplug hole before testing each cylinder. if theres alot of increase in compression, your rings are geting bad. if theres little or no change, its likely valve seals. if theres little change on one or 2 cylinders, its a gasket or cracked head or maybe a burnt valve. if the change is between 20 and 40 lbs thats about normal for a 40K engine

May 28, 2010 | 2003 Saturn VUE

2 Answers


Oil consumption.

Bad rings,valve guides

May 15, 2010 | 2004 Nissan Altima

2 Answers

90 honda accord with excessive oil smoke. All cylinders have 180 psi compression,valve seals have been replaced. please help

It could be a oil control ring on piston or oil control valve on head or valve guides to worn or improper valve seal replacement or head gasket cracked head etc

Nov 12, 2009 | 1990 Honda Accord

2 Answers

Low compression in a 1999 sunfire. will not start, does fire

There can be several causes for low compression.
Chck the obvious first. the spark plugs must be checked that they are all in good condition. not burnt, the gap must be good( for your engine).Check the wires and coil so that good spark is obtained. Blue spark , not weak yellow spark. After everything is good. Check the cylinders to see if they have compression. To test the cylinders do the procedures shown below.

If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

compression test will help you determine if the oil is getting past the valve guides or the rings. If the cylinder shows little leakdown or holds good compression when a little oil is squirted into the cylinder (wet compression test), it would tell you that the engine needs new valve guide seals and/or guide work. Most late model import engines have positive valve guide seals. Often, the guides are fine, but the seals are worn or cracked. The seals can be replaced on some engines without too much effort and without having to remove the head.

finally if the rings on one or more of the pistons can caus compression leak. It must be located and fixed.

Mar 03, 2009 | 1999 Pontiac Sunfire

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