2020 sr cold start rattle
- Thread starter Vbaraj3625
- Start date
billssr5
Well-Known Member
you bought it from a Toyota dealership?
billssr5
Well-Known Member
bought mine at 49k, i had alot of gremlins i had to iron out and still have a lingering cam bolt that loosens up and creaks till i torque it down, drives me nuts, i think maybe the cam bolt or nut got striped out by a overzealous air impact wrench or something, the cam tabs got rolled and really dont have the money for a full LCA arm replacement, this was done at a Toyota stealership
billssr5
Well-Known Member
that dont sound right mine makes all kinds of noises with a below freezing soak till the oil circulates maybe a minute or lesss, no rattles above 32 degrees maybe its a bad drive pulley or waterpump, mine are all original with about 156k miles
VVTI makes a classic noisy ratching clacking noise for 5 seconds, or so whenever cold started, or when the engine has been off for a few hrs. It's definitely a recognizable sound if you've heard one before. When cold the majority of oil is at the bottom of the engine, it takes a few seconds before enough oil pressure gets the oil up top. Newer engines use a solenoid for the vvti, which should be checked first....could be an easier fix. Otherwise the vvti cam gear needs to be rebuilt, or replaced. Its a fairly common failure if not doing regular oil changes. It's important to use a synthetic oil with a quality additive package.
All I can say, a number of these vvti engines, especially those 2.7's have had a history of vvti issues in the past. Just make sure your battery voltage is not getting weak, or the vvti filters aren't obstructed in anyway. A friend of mine thats a toyota tech seems to think the oils viscosity has something to do with these vvti problems if running a heavier viscosity oil than called for....says its important to run a high grade synthetic the manual calls for like the toyota motor oils that have their own additive package. At any rate once those vvti gear assemblies wear out for whatever reason they start making noise until they get enough oil pressure in them. If the vvti is the problem, and its not fixed, eventually its going to self destruct, and cause the engine to grenade.
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JayQQ97
MW surVivor ... clutched. 361k on the 0D0
Y can they Not replicate it?
JayQQ97
MW surVivor ... clutched. 361k on the 0D0
i thot you said elsewhere it could be the power steering old fluid or pump causing cold-weather startup knocking sounds ??
billssr5
Well-Known Member
i suspect it was the power steering since it was mostly coming from the front of the engine im not 100% sure although this morning after a 2 day below freezing cold soak (not started in 2 days to clarify) i did have some disturbing rattle/knock from the front of the engine until the oil circulated thru the motor, ive had 3 toyota truck 4 bangers 22,22RE,and this 2.7L and all has disturbing startup knocks and rattles with below freezing temps at startup, i had a 3.4l taco before this and really never heard this type of rattle with it, seems like this is just a 4 banger occurance to me, and after warmup drives fine and quiet too
I had the toyota 20r and 22re engines in pickups that I put a ton of miles on. The 22re had a couple of issues with shearing a crank key, and a timing chain tensioner issue, otherwise both didn't make a lot of hp, but were reliable. The 3.0 v6 in my 93 pickup was another good engine, but lacked hp. By 2001 I needed another bigger full size truck for the business like the chevy's I had, so I went with the tundra which put those gm trucks to shame.
If the vvti timing chain guide breaks, due to a sticky vvti gear that becomes locked, the broken guide pieces can end up in you engines oil causing a healthy engine to grenade. A 1 sec. rattle isn't an issue yet, its a lot different than one that can take several. Several seconds, or more of rattling tells me no oil is getting inside crucial vvti gear areas, like when you have overnight cold starts. By then the vvti gears are already pretty wasted ...your allowing metal on metal to now happen, that has allowed excess wear in the vvti gear assembly. It needs to be replaced sooner than later.
billssr5
Well-Known Member
on my 22RE had stretched chain, broken timing guides(plastic from Toyota) and had to have new timing chain plus new aftermarket metal chain guides which are whats recommended so when the chain stretches and slaps the guides they wont break and fragment like the OEM plastic versions, the truck had well over 200k miles when i had the timing chain/guides issue, on my 3.4l truck (timing belt) toyota recommended timing belt replacement at every 100k miles at $1000+ cost. depending on who does the work.
Yeah, it was over $1k for a timing belt kit that included the new belt, water pump, and tensioner for my 01 4.7 tundra every 100k miles to. When I sold the truck with over 290k miles, I let the next guy worry about doing the belt...it had about 15k miles left before it needed a replacement. That truck needed mucho other stuff done, not to mention a paint job. Only real good thing it still had was the ebc drilled, and slotted brake rotors.
Vbaraj3625
Member
Update on my 2.7 4 cylinder 2020 Tacoma. My last oil changed I decided to use mobile 1 fully synthetic oil 0W-20 and mobile 1 filter. After using this oil it has stopped making the cold start rattle and I have been starting it up in the morning for the past 7 days, which have been in temperatures under 30 degrees Fahrenheit. I have always used 0W-20 fully synthetic. The only difference is I went with mobile one this time.
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Mobil 1 0w20 extended service is all I've ever used on my current tacoma, even our prius. Although it's been as low as -11 here in the morning, when i've started my truck, there's been no rattle yet, but the truck at this temps isn't happy. This v6 sounds more like my v8 tundra did at those temps.