Ticking noise after oil change.

[peby14]

Hi Everyone, thanks for reading my post. Once again there is something wrong with my P38. I have a 2001 30th Anniversary (4.6HSE) and i went to get my oil change today. I bought Mobil1 Extended Performance oil and Filter. The oil is 5W30, which after hours of looking online this was the best for cold and heat since i live in Massachusetts. 2 hours later I noticed i heard a constant ticking noise that increased in intervals the more i accelerated. I have been looking for the past 3 hours the problem/ solution to this. I have read and read that it could be The exhaust Manifold or something to do with the exhaust with could be because my exhaust silencer is corroded and leaks. Another post i read in a 02 Disco ( same engine as mine) that it could be the lifters. I also read that it could be the oil, someone had put 5W30 and had the same noise, he changed to 10w something and it stopped making the noise.

Does anyone have experience with this? What should I look at or where should i Be looking? My last resort is to take it to my mechanic but the bill is always over 1K.

[leftlanetruckin]

I run 10w40 myself in Missouri year round.
Sounds like lifter tick if it happened after an oil change.

Martin

[peby14]

Is it ok to drive it like that? At least to the mechanic? Or should I tow it? I just got an engine swap a few months ago and dont want to re-live that experience again.

[leftlanetruckin]

IF it is a lifter sticking a bit, no big deal.
I will tell you now though, that the book time to R&R all lifters is not going to be cheap. Be much better to replace them yourself and learn the engine IMHO.
Basically...
Intake all off.
Valley gasket off.
Valve covers off.
Rocker shafts removed.
Pushrods removed.
Then you can pull the lifters out with a magnet etc.
Totally nothing that is brain surgery, and no easy way to screw it up unless you are a gorilla with tools. Just a little time consuming is all. Allow a day for a first timer and then take the missus out with the $6-700 you saved yourself!

Martin

[Jos Geuze]

Hi

The ticking comes from the pushrod hitting the rockerarm when the pushrod is pushed upwards by the cam.
Normally there is no clearance if the tappets do their job, and the cam operates the valve via the tappets, pushrods and rockerarms. If the tappet is not working, the cam start moving the pushrod upwards where it runs into the pushrod when the clearance is bridged.
It will not be a huge problem to drive it a few km like that, but if left unattended the pushrod and rockerarm will get damaged.

Stuck tappets can be a sign of carbon build up and the dirt has blocked the supply of the oil, or has lodged between the non returnvalve build into the tappet leaving it open. If you decide to change the oil add engine flush to the old oil to dissolve and remove as much sludge from the engine as possible and run the engine for as long as described on the bottle before draining and refilling.

Regards

Jos

[peby14]

Here is a video of the noise. I haven't started her since I heard the noise, the first time I started it today it made no noise and little by little it got louder. I shut if off and this recording was the second time I started her up.

[leftlanetruckin]

Barely hear it?
I would investigate that ASAP, as it isn't like any lifter noise I have heard on these motors. More like a timing chain or broken rocker arm than a lifter IMO.
Have you checked for any exhaust leaks by the manifolds etc?
You need to pinpoint the noise then tell us where it is, and then maybe we can help you some more.
It is always hard to tell over the internerd though, so YOU will have to do some digging on that, but I would refrain from driving it until the source is found.

Martin

[Jos Geuze]

Hi

As martin mentioned this does not sound like lifter noise at all, but like one cylinder leaking combustion gasses.
I would try running with one cylinder disconnected (Sparkplug) and see if the noise will disappear and do this for all cylinders one by one. I have a faultmate to reset any faults that might come up so you may look for an OBD2 reader to reset faults before you do this.

Regards

Jos

[WayneB]

It sounded to me like you actually have a sparkplug that is loose and backing out.


Just check they are all tight when the engine is cold.

Hopefully If it is that , someone hasnt ruined the thread in the cylinder head.

[Hemi]

Change the oil for 10/40 first and see f that cures it,5/30 is a bit thin for that engine.....it's cheaper than changing the lifters for no reason....

[rhino_ed]

Sounds like headgaskets

[peby14]

So I tried to pinpoint where the sound was coming from and from what I could hear It was coming from the right side of the engine around cylinder 3.For some reason the microphone in my cellphone made the sound much louder than it actually sounds. The manifolds look good. My engine had over heated in the summer and I had a slipped liner so I went to a recommended Rover mechanic and did an engine swap, the current engine in my Rover. 2,000 miles later one hose leak causing an air bubble or I forget the term used for I took it back and they ended up opening up the engine to find a bent valve and a little piece of metal in one of the cylinders or somewhere in there. Now I have the following codes as well so im just going to tow it to the mechanic and fix it. Unfortunately where I live I'm not allowed to work on my car.

P0135- Oxygen O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

P0155- 02 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)

P0154- 02 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)

P0455- Evaporative Emission Control System Leak Detected (no purge flow or large leak)
^ This one has come on multiple times over the year but sometimes wont come back for a month or two)

P0306- Cylinder 6 Misfire

[wreckrunner]

Looks like when you originally slipped the liner the engine was burning coolant, this coolant in the exhaust could have killed your oxygen sensors, P0455.... find the vacuum leak, may be a vac hose off or split, may have been missed during the engine replacement. As for the 0306, do the basic plug and wire inspections, maybe even swap a plug from another cylinder and see if the misfire moves..... if the miss is detected on the cylinder you swapped plugs with, its the plug, if it stayed on cyl #6, try changing out the wires.

[peby14]

Looks like when you originally slipped the liner the engine was burning coolant, this coolant in the exhaust could have killed your oxygen sensors, P0455.... find the vacuum leak, may be a vac hose off or split, may have been missed during the engine replacement. As for the 0306, do the basic plug and wire inspections, maybe even swap a plug from another cylinder and see if the misfire moves..... if the miss is detected on the cylinder you swapped plugs with, its the plug, if it stayed on cyl #6, try changing out the wires.

Thanks I'll try that tomorrow. Another problem I have been having is my trip computer. Before it used to say my Average MPG was 99.9. Not it says my average is 23.5 (If only!) I have tried to reset it multiple times but it goes back up to 99.9. Does anyone know what the cause of this is? Or how to fix it.

[RRToadHall]

MPG resets just like dist to empty etc reset. You have to give it time to calculate an average based on your driving.