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low engine pressure

If you just cranked over the engine a few times with no oil in it would not cause any issues except you would not have any oil to timing chain tensioners and may have caused the timing chain to jump...

Claimed by Kevin Gainer

Hi there. If you are feeling air pressure coming out of the engine in this area then you have a problem with warpage or a crack that is not seen. Once everything is put together and torqued then you should...

Hello - yes, low oil pressure and high miles can certainly product a metallic clattering (https://www.yourmechanic.com/question/there-is-no-check-engine-light-on-but-the-car-is-making-a-lot-of-noise-it-still-runs-ok-by-nyok-m) from the timing chain set, as well as knocking noises from worn connecting rod bearings and crankshaft main bearings. If you are getting low...

Hello - there are several possible causes of low compression (https://www.yourmechanic.com/article/how-to-do-a-compression-test-by-robert-tomashek) on 1 cylinder only. Causes include: burned valve, worn piston rings (not common for a single cylinder), worn camshaft lobes (not allowing full air charging of the cylinder), valve...

The low pressure light is your oil pressure for the engine and if you loose the oil pressure to all the internal bearings can cause major engine damage. You will need to have your engine checked to see if this...

Try to add about 3 to 4 quarts of oil to bring it up to full mark and then see if engine noise goes away. You may not have damaged engine yet. If noise continues after adding oil then you...

Hi there - you don't indicate your mileage, but low compression (https://www.yourmechanic.com/question/drop-in-engine-compression) may be a normal result of a high mileage engine, or a problem due to abnormal wear. Oil breakdown can cause excessive piston ring wear. Extremely lean mixtures...

Hi there. Depends on what type of smoke was coming from the engine and where it was coming from. If the smoke was coming from the exhaust pipe, then either fuel or oil has entered into the exhaust system through...

having low compression in one or more cylinders with oil fouling of plugs will indicate a bad piston or piston rings. If the engine is more expensive to replace then the prive to repair and is over the value of...

Your 2003 Envoy seems to have quite the variety of symptoms, and these could indicate a variety of problems. The smell of gas may be due to a fuel leak or may be an issue with the EVAP system. Or...