0
Oil leakage and loss of compression and power loss.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
Why does a car engine burn oil?
bad piston rings Excessive engine wear - Rings, Valve guides, Valve seals
How can you identify valve wear problems?
Valve surfaces start to wear as soon as the engine is first started... what happens is a valves will cause a loss of compression, and when one is "burned" you'll have a "dead" cylinder They almost never ALL go bad at once.. If the engine is blowing smoke out the exhaust in the morning, then the valve seals are going bad, and there are additives to help renew the seals... feel free to write with more on how its running.. dave cartalk@fastmail.fm
Why does your 1987 Corvette puff blue smoke when you first start it?
The engine valve stem seals are worn. Usually valve stem seal replacement is all that is needed, occasionally there is wear in the valve stems and/or valve guides which requires further repair.
Why is my car burning too much oil?
Oil burning is usually connected to engine wear. Valve seals and piston rings wear out and allow oil to pass into the cylinder during combustion.
Why you measure the compression pressure?
to check the piston rings and the valve seals for wear.
How long does a Chevy 305 engine last?
Practicall forever. I tore down my 87 305 at 100,000 miles and there was practically no wear at all, just some dried up valve seals.
Can a rotary pump on engine become defective?
Sure. Bearings and seals can wear out.
Why would aVauxhall vectra engine be burning oil?
The engine oil is kept separate from the combustion chamber by the valve seals and piston rings, either of these may be worn out. These are seals placed on moving parts so the more miles the car has on it the looser they become, several things like letting your oil level fall too low, or operating at too high rpm can cause premature wear of these seals. In some instances a faulty pcv valve can allow oil to enter the intake manifold when crankcase pressure is too high so check it out as well.
You own a 2002 Toyota solara 120000 k on a cold start it puffs a shot of blue every time anybody having the same prob?
Regardless of mileage or vehicle type, a puff of white or blue smoke on startup indicated worn valve guide seals. While the vehicle is sitting, oil can leak past the seals and drip onto the top of the piston. When the engine is started that oil is burned and produces the smoke. It's rare to see valve guide seals wear out as quickly as yours but it can happen if oil isn't changed often enough, improper oil is used or there's an abrasive in the engine that grinds up the seals. Cheers
Why would there be oil in the carburetor on a Chevy 350 5.7 Engine?
Oil in the carburetor can be from a few things. Check the PVC valve. its the thing sticking out of the valve cover. If it rattles when you shake it its generally okay. It could be from clogged oil drains, these are located under the valve covers towards the rear of the engine. Cleaning these can help. Bad rings and/or valve seals can also be part of the problem. Over time the rings get worn and blow-by happens. this is when the compression causes the oil to be blown by the rings into places it shouldn't go. Generally when the rings are worn you'll get smoke from the exhaust. Valve seals get old and crack or wear out. replacing those might as well help. Failure of the rings, valve stems and/or PVC can cause positive pressure which will push oil up the crankcase to carburetor breather. If your not blowing blue smoke I would just clean the PVC valve, clean the breather filter and in some high performance engines a oil/air separator is installed.
Why do engine lifters wear?
As with anything mechanical the springs or hydraulics eventually lose their ability to properly lift the valve back up quickly, which causes valve float and loss of power at the top end of the engine.
Why does your Volvo give off a bluish smoke when you let off the gas?
A quick guess is that the valve seals are worn and/or maybe the valve guides. Oil is pumped up over the top of the head to lubricate the valves. The valves allow the engine to "breathe" by letting the fuel-air mixture into the cylinders (or just the air in fuel injected models) and by letting the exhaust gas out. The cam shaft operates the valves either directly or indirectly, depending on the engine design. The whole thing needs to be lubricated with oil to keep it moving freely. Valve seals seal the stem of the valve and the head to prevent oil from going down along the guide and valve stem into the intake port. When you let off the gas, the intake manifold vacuum goes up, and this "sucks" oil past worn valve seals and along worn valve guides into the intake manifold where it's sucked into the cylinders and burned. Oil burns "bluish" under these circumstances. It is possible to replace just the seals, but it's tricky. What's the wear on the guide like? It may be time for a valve job. The head(s) is (are) pulled and disassembled so the guides can be refurbished or replaced and the valves and seats can be reground. When the head is reassembled at the machine shop, new valve seals will be put on. (They almost always come in the head gasket kit.) A link is provided to a picture of a valve assembly.
