When I remove the oil fill cap, you can feel the pressure blowing! out of the hole. I have been told that this is common on these motors, but no one knows why. The clock reads 100k miles and it is NOT using oil.
Also it has developed a mild whine at startup when cold. This seems to be coming from the accesory drive end of the motor. Any thoughts on these items would be appreciated.
2007-12-26 06:42:45 · 5 answers · asked by Valentine 5 in Cars & Transportation ➔ Maintenance & Repairs
Just so you will understand, I am a hobby level mechanic, restoring and rebuilding non running basket cases. I know about PCV valves. This is 4 to 5 psi out of a 1.5" hole, way over normal. It is way beyond valvetrain windage.
2007-12-26 07:43:05 · update #1
Stop looking for problems that don't exist.
The pressure you are "feeling" is the oil spash and windage from the overhead cams and valve components. This is normal.
The whine is probably the power steering pump, and this is normal when it is cold outside. If if persists, you could change the oil in it, but it will still whine some when cold.
2007-12-26 07:23:49 · answer #1 · answered by Bert from Brandon 5 · 1⤊ 0⤋
When a motor is running it will have a bit of pressure. That is why there is a pcv valve in the cam cover. If the pcv valve is plugged you will have problems with gaskets seeping oil. Remove the pcv valve and shake it to make sure the check ball is loose. If it's the screw on type don't break the tube to the cam cover it's a bit fragile. Most people don't open the oil fill when the motor is running because it usually blows oil all over the motor.Just curious? The whine could be a pulley,belt, power steering pump etc. You need a mechanic to tell you what is needed when the noise is there.
2007-12-26 14:54:21 · answer #2 · answered by thebax2006 7 · 0⤊ 0⤋
Firstly, be sure that your PCV valve and it's hoses are clean, with no obstructions. These vapors should be taken in by this valve. Engine noises are the problem. Check your owner's manual to see when the manufacturer wants you to change the timing belt and tensioner pulley. If this breaks, you'll be looking at HUGE $$$$$ to repair bent valves and head gaskets and more. When all else fails, take it to dealer for opinion, get an estimate, but don't approve of any work. Always get a second opinion. The noise you are hearing may be a godsend warning you to have that belt changed before the inevitable happens. If you have a mechanically inclined friend, replacing the timing belt and pulley should cost around $150. Waiting too long can cost you BIG TIME!!! Even if the noise turns out to be only a service belt or pulley, do the preventative maintenance required by your manual! Your car will like you for it.
2007-12-26 14:58:12 · answer #3 · answered by Robert M 7 · 0⤊ 0⤋
As the engine slowly wears over time the piston rings don't seal as well and combustion pressure leaks past them in to the crankcase.This is to be expected and not a problem unless it gets so bad that the engine runs poorly,yours is far from that.Like they said,change the pcv valve because it sends the pressure back where it belongs.
The whining may be the alternator or power steering pump.At this point I would just keep an eye on it and do nothing until it becomes obvious enough to need repair.
Good luck with it
2007-12-26 15:47:21 · answer #4 · answered by wildmanny2 7 · 0⤊ 0⤋
Change your PCV valve. The PCV valve, or positive crankcase ventilation valve removes the blow-by gasses that build up inside the engine and send them back through the intake to be burned off during combustion. It is not normal for pressure to build up inside the engine the way you describe it. If the PCV valve is clogged the pressure will eventually find another way out, possibly causing major damage to your vehicle.
2007-12-26 15:01:55 · answer #5 · answered by Wayne M 1 · 0⤊ 0⤋