Noise with Mobil 1

[kschachn]

Well, I think I have some major crow to eat regarding my "sure thing" that M1 was noisy in my Toyota 1MZ-FE engine. I had been having this valve noise for a while now (6 months to a year), and when I switched to Penz Plat, the noise went away. I posted that this was the fix for my car.

Well, not anymore. The noise was back despite the PP and I even tried a Toyota filter rather than the M1 filters I usually use. No difference, the noise was getting worse and now sounded like a bad rod bearing knocking. It was nasty at about 2600 RPM.

It was time to take it to the dealer and get it checked out. Bottom line? A no-charge diagnosis of a bad timing belt tensioner pulley bearing. The car has 150,000 miles on it now and when I replaced the belt 80,0000 miles ago I did not replace those two pulleys. It seems one or both is bad and I've bought the parts to change everything out (along with the water pump) this weekend.

Mind you, there is still a very small chance that isn't it, but I and the Toyota tech are about 98% sure.

The good news is that I can go back to my beloved M1 and rest easy once again...

Sorry for the noise on this bandwidth.

 

[ekpolk]

Shame, shame, shame on you!!! Go flog yourself -- 100 lashes with -- a worn out timing belt. . .

 

[427Z06]

Yes Young Grasshopper...the circle is completed.

 

[GMorg]

Why is so difficult to differentiate what we think that we from what we know that we know?

 

[goodvibes]

I know.

Might as well try them both again when your fixed.

 

[Schmoe]

alrighty then..........

 

[speedtc]

Under cold startups in the winter with mobil 1 5w20 the motor would sound horrible for a few seconds. With other syns this is not a problem. Alos after about 2-3 grand the motor would start to sound thrashy with 5w20 m1. The UOA don't show anymore wear it seems but i just don't like it.

 

[m2200b]

Seems to me you proved PP covered the noise better than M1 of lifters that were getting out of spec with a failing tb tensioners. PP did it for awhile until I assume the bearing of the tensioner got even worse.

On you own observation M1 did not cover this same lifter noise but you want to use it so much you are ignoring what you heard. This isn't rocket science - PP in my GM v6 is quieter than same grade M1. Havoline and Chevron same grade 5-30 were both quieter than M1 in my engine.

 

[302Xplorer]

Poor horsie.

 

[kschachn]

Yeah, I don't mean to start up that whole noise debate again, I was just coming clean on my earlier post. The noise was not from the engine and it was a random thing that it started/stopped when it did. As the tensioner bearing wore out some more, the sound became more frequent and I was able to tell that it had nothing to do with the oil.

Thanks.