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Any more suggestions? I have been reduced to starting it, turning it right back off, then restart; magically never a rattle when I do that series of things. And rubs perfect all day. It’s so random only at cold start, 3-4 times a month, I can’t get any reliable mechanic to hear it, or do...

Well, it made the rattle this morning. 50 degrees. However it was very short in duration, just longer ones to come. Dang, thought I had it. So do I go thicker oil? Or give up and drive till something breaks.

I have narrowed mine down to oil flow on start up. It 100% does not ever do it once we reach Spring and stays over 50 degrees. Not ever once has it made this noise from Spring through today. I mean NEVER. I still maybe wrong on this, but I have eliminated so many other things. So, after much...

So, I give up to the gremlin; haha. After almost 3 months it made the same noise (however not as loud). I give up and give in. Maybe the Mobil one high mileage 0/20 helped quiet it some, when it did do it. Who knows?? For taco lover also chasing this, the only consistent thing I noted, was when...

Secondary. Primary was checked and fine, which was weird. But it was a replacement for a stolen one a long time ago. The belt was again, me just trying to fix the noise.

I did solve it. At least it has not made the noise since January 11. Probably should have been more patient, as advised. But it sounded so bad. I swapped out other things, just chasing it. Noise was still there. The last 2 things solved it. I’m sure it was just one, but since both were done at...

It does this very random grinding rattly noise on start up. It can go more than a week without making it at all. If it’s longer induration, I can turn the key off and immediately restart without it making any noise at all. I’ve been all over it and about to give up. Sticky starter bendix??

I’m really leaning towards a stuck starter or solenoid trying to engage again. It’s exactly what it sounds like. Anyone have this issue? Or Tacoma’s prone to this?

Ok. Still very random and even seemed much better and further apart until this morning. Not cold (50 degrees). Last week I Changed my VVT oil solenoid / control valves as a last ditch effort and also switched to a “Tacoma oil forum” recommended Mobil 1 Extended Performance along with staying...

Ok. Still very random and even seemed much better and further apart until this morning. Not cold (50 degrees). Last week I Changed my VVT oil solenoid / control valves as a last ditch effort and also switched to a “Tacoma oil forum” recommended Mobil 1 Extended Performance along with staying...

And, I appreciate everyone’s guidance and opinions. Thanks everyone!!

I would love to step up oil weight by one notch, as it actually seems to be better when it is very cold. Could just be coincidence. Although I see all kinds of guys saying thicker oil is horrible for the VVTI cam / gear set up (which is what I think I’m fighting). Toyota says only use 5w30 for...

Don’t really know, it’s the one part I haven’t investigated 1000%. I will check that out. Only noises I’m finding people report is just fan roar. Could it pop or rattle on very random start ups. It’s tight, no wobble. But I do believe it turns on start up and I can spin it a good rotation or...

O god, does my OCD run me down the fan rabbit hole now?Could a faulty fan clutch make that noise? It does spin quite freely.

I hate to keep beating a dead horse, but something should be able to be fixed. This noise in my start up video, started just 3-5,000 miles ago totally out of nowhere. I have researched every forum, YouTube, been to my local mechanic and Toyota. Nothing. However it only does it on cold starts and...

2019 2.7: Any thoughts on Oil System Cleaners? Which is best?

Any reason a loose shield rattle would only last a few seconds on a cold start though?

Thanks, I will crawl over it today.

Same. Mine is 2019 2.7 4 cylinder. Random rattle on cold start. Been through a lot, can’t figure it out. Any thoughts?

Same. Mine is 2019 2.7 4 cylinder. Been through most obvious things. Still with this intermittent noise. Any thoughts?