I know that the problem is caused by valve covers warping from heat build-up. This allows oil to drain on coil &plug which causes misfire. Is their a cure does Jaguar make a set of metal valve covers. Bobby
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Check your PCV valve (Positive Crankcase Ventilator). Normally located on a valve cover with a hose to the intake manifold. Remove it and shake it and if it does not have a rattling noise and is clogged, the valve is defective and not allowing pressure that builds up in the engine to be released through the intake manifold thereby forcing engine oil through any loose "exit" such as the dip stick tube or loose valve cover bolts, etc. This valve allows the engine to "breath" so to speak. No rattle...replace...not expensive as compared to what damage it can cause. Good luck...Ken
Do you notice any blue smoke out the tailpipe?
The P0301 code means you have a misfire in cylinder 1. If I were to put these two symptoms together, I would guess that there is oil leaking into the cylinder, which is causing it to misfire. The oil then burns out the back.
If this is the case, it is probably because your spark plug tubes are leaking. Replacing the valve cover gasket or spark plug tube seals (some cars have a valve cover gasket that has the tube seals included) will solve the problem.
You can check for the leak by pulling the spark plug wire out of that cylinder and seeing if it is oily. If it is, there is your leak.
This is just a first guess. Let me know what you find.
Also, let me know about whether or not your tailpipe has blue-colored smoke coming out.
if you have oil leaking that severe, chances are that one of your spark plug holes have oil in them causing your misfire..in that case it would sound that you need to replace your valve cover gasket
to check pull one by one you ignition wire up from valve cover and check for oil in hole and on boot
I doubt the oil is boiling in the sump or your engine would show signs of over heating. Change the PCV valve in the valve cover as it may be stuck closed causing internal pressure to build up and escape through the filler cap.
these cars dont really burn oil, but can. i would have the car put up on a lift and take a good look, i know they leak at the valve covers and the head gaskets ,i've done alot of them, if you are sure it not leaking then have the pcv system checked you may want to replace the pcv valve if its been a while, this valve sucks the preasure out of the oil crankcase and burns through the motor, if this valve sticks it will allow preasure build up and force oil into the combustion chamber and cause oil useage, hope this helps.
trouble code 0305 is for cylinder misfire.misfire code for cylinder #5 which is what a P0305 code represents. There will have leaking valve cover gaskets allowing oil to contact the boots of the ignition wires and short the high voltage to ground causing the misfire.in this case check whether plug wires, sparkplugs and valve cover gaskets are in good shape .this will help you to determine the cause of your check engine light on.This will help. Thanks please keep
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possible bad rings, i would put some motor tune-up in oil will clean carbon off rings, its made by company called seaform and is called motor tune-up, put hole can in oil and drive for about 30 days ,its good stuff can also use in fuel to clean injectors, could also have worn out valve stem seals causing oil to leak pass valves into cyl
what this sounds like is that your engine is starving for oil and the tapping noise is yuour rocker arms. this could be due to sludge build up on the intake screen of your oil pump or the pump itself is weak and no longer is providing the needed oil pressure. another place for sludge to build up is the valve covers and until the engine heats up very little oil is circulating to the push rod,rocker arms, and lifters. my suggestion is to clean the valve covers, drop the oil pan and remove the pump to look at the gears to see if there are missing teeth. also clean the screen of the pick up tube. replace the oil filter and put in new oil also use lucas additive this will do a good job of keeping the sludge build up to almost nill. if the problem persists then i would say that one or more of your hydraulic liftyers is weak and then they will need replacing.