Put wrong viscosity in my Tundra truck. Forget about it?

[Copperhead]

The reason for the 0W20 is called for in the newer engines is because of the tight engine component tolerances. Using heavier weight oil will limit the flow to critical areas in the engine. I have two vehicles that call for 0W20 and that is all I use...in fact I only use 0W20 synthetic.

Not convinced of the closer tolerances argument. There is not that much difference in component manufacture between something like a 2016 GM 5.3L engine that 0w20 is recommended compared to a 2016 GM 6.0L that has a 5w30 recommendation. Same can be said of every engine in every brand. Not like some of their engines are done on 1960's machinery and others are done on 21st century machinery. Viscosity is not thickness, it is fluid flow resistance. You need a certain level of resistance so that oil is not squeezed out of high pressure bearings and such too quickly.

 

[sixdogs]

sixdogs; It depends what year and engine size your Tundra is; '07 and later 5.7s have timing chains, not belts. The earlier 4.7s had belts as did the V6s. I'm not 100% sure, but believe the later 4.6s also have chains but I have no idea what, if anything, the chain equipped engines use for a tensioner

Oops, yes it is a double chain and I knew that. I cannot find in print what kind of tensioner it has but it appears to be a series of what I think are hydraulic tensioners but I'm not sure what I'm looking at.

In the link below, scroll to the last entry and click on any of the four chain tensioners. That's what I have for my 2011 Tundra 5.7 engine. Now, how does the type of tensioner affect things? Apparently, engine oil must play a role in this tensioner, assuming it is hydraulic?


Toyota Timing Parts

 

[Barry 1]

Oops, yes it is a double chain and I knew that. I cannot find in print what kind of tensioner it has but it appears to be a series of what I think are hydraulic tensioners but I'm not sure what I'm looking at.

In the link below, scroll to the last entry and click on any of the four chain tensioners. That's what I have for my 2011 Tundra 5.7 engine. Now, how does the type of tensioner affect things? Apparently, engine oil must play a role in this tensioner?


Toyota Timing Parts

The belt tensioner has nothing to do with engine oil. It is a separate sealed unit,kind of like a mini wheel strut.(fixed it ) Looks like chain tensioners do use oil pressure.

 

[big bubba]

The tensioner has nothing to do with engine oil. It is a separate sealed unit,kind of like a mini wheel strut.

correct, my understanding as well. have older honda w/hyd timing belt tensioners (2) and they are both sealed units independent of engine oil flow.

 

[3930dave]

correct, my understanding as well. have older honda w/hyd timing belt tensioners (2) and they are both sealed units independent of engine oil flow.

It is a hydraulic piston that is supposed to be sealed. I know about them because of friends who've changed leaking ones.

Dorman Products - 42-127

I don't know if anything equivalent exists on OP's truck. I wasn't there when the work was done; I was under the impression that these Honda ones used engine oil for pressure - doesn't appear to be the case, based on the Dorman pics.

Apologies for the non-tame goose chase.....

Rgds, D.

 

[DEWFPO]

The hydraulic tensioner for the Timing chain on my 07 Toyota FJ is fed by engine oil pressure. The higher the oil pressure, the tighter the tensioner keeps the timing chain. There's a small oil hole in the block and in the tensioner.

Timing Belt tensioners are sealed hydraulic units.

DEWFPO

 

[TomSeller]

I'd change it to the factory recommended oil and not lose any more sleep. I don't try to out think engineers that design engines.

 

[Copperhead]

But the engineers do not have the final say as to what is best. Ask anyone who has worked in R&D. And when it comes to vehicles, the Gooberment has its fingers in the game. Many of the low viscosity requirements have as much to do with CAFE requirements. A engine in the U.S. might have, say, a 5w20 recommendation, but the same engine in another country might have a 5w30 recommendation. Same engine off the same production line.

 

[Garandman]

DeereDude...Hat's off, and a salute, to airborne SF from an older, and at the time, unwilling clerk typist. (I jumped out of my chair once).

Those are guys, along with all Marines, that have earned the respect.

As a former enlisted 11B turned Airborne and Ranger qualified Cavalry officer: so have you.

We join the Army to serve the nation. The Army decides what we will do, and we do it and drive on with Life.

The "Tip of the Spear" cannot function without the diligent efforts of every single other soldier.The Army is woven into every facet of American life: always has, always will.

 

[Barry 1]

Looks like the "chain" tensioners Do use use oil pressure.Learn something new every day. Can't find much info on them.