Periodic loud ticking immediately after oil change M50

[Russell]

0w30 and 0w40 do not seem to be real suitable for M50s with "advanced" miles. Mine started getting a random idle tick when warm with 0w30 castrol syntec with about 4,500 miles on the fill. I changed to a blend of 10w40 (2 quarts) and 5w50 (4 quarts) castrol syntec and no more warm idle noise.

0w40 mobil 1 was just noisy. I just did not like it. Going to stay with heavier oils, especially in the summer.

[repenttokyo]

update: today i put in 15w50. The tick was still there, pretty loud. It would periodically disappear however. I then drain about half a quart of oil and put in half a quart of sea foam - i will see if that cleans anything out. The oil I took out of the engine was quite black already....

This is really strange. Just before the oil change I installed an EAT chip. Could the advanced timing have messed up my vavles or lifters?

[Blitzkrieg Bob]

multi grades thicken as the car warms up.

I'd give it some time before freaking out.

[repenttokyo]

I've driven it about 10 km's so far. Do you think that would be enough? It's been city / stop and go style.

I really appreciate everyone's help. It's upsetting that this has occured now, as I have a cross country road trip planned for August. If this tick is just an annoying sound, that's one thing. If it's something that is eventually going to implode my motor, that's another. I need to figure out which one it is.

[Ross]

If the oil got black very quickly then it sounds like the detergents are doing what they are supposed to. Or, you could be running overly rich. Has you fuel economy taken a dump concurrent with the chip?
Is it clean inside the rocker cover when you remove the cap?
Advanced timing won't screw up your valves.

[repenttokyo]

my fuel mileage has actually improved by about 2-3 mpg overal since, so I don't think it's overly rich.

Inside the rocker cover seems to have some sludge, I keep getting black solidish oil on the tip and sides of my funnel when i pull it out / move it around while changing the oil.

[Jon K]

If the oil got black very quickly then it sounds like the detergents are doing what they are supposed to. Or, you could be running overly rich. Has you fuel economy taken a dump concurrent with the chip?
Is it clean inside the rocker cover when you remove the cap?
Advanced timing won't screw up your valves.

Ross oil won't turn black from running overly rich - if he's running retarded rich the car would reek of fuel and would have gasoline in the oil (blow past the rings). It sounds like the oil is working and he's paranoid. I do hope you are running at least 91/92 octane OP?

[repenttokyo]

Ross oil won't turn black from running overly rich - if he's running retarded rich the car would reek of fuel and would have gasoline in the oil (blow past the rings). It sounds like the oil is working and he's paranoid. I do hope you are running at least 91/92 octane OP?

well it's working in the sense that it's lubricating my car, but it's not working in the sense that i still have a loud ticking sound, which is the symptom I am trying to cure.

I am not paranoid.

I am running 93 octane.

[Jon K]

I mean you could simply have bad lifters. You are indicating 360km , thats a lot of mileage. I wouldn't be surprised if **** starts getting loud at that age.

[repenttokyo]

I mean you could simply have bad lifters. You are indicating 360km , thats a lot of mileage. I wouldn't be surprised if **** starts getting loud at that age.

there's a difference between the normal sounds of a high mileage engine, and the sudden appearance of a very loud tick immediately following an oil change. Having had the car since December, I am quite familiar with the normal sounds of it's operation.

I am aware that I could have a bad lifter. It could be many things. The diagnostic process is ongoing, which is why I continue to post in this thread.

Incidentally, the head was rebuilt at 200 000 km.