Tundra piston slap?

The one big question I have: Is the 2UZ-fe in Tundra/Sequoia developing piston slap?

I heard this is the case from a well respected mechanic in Boulder CO.

I'd like to hear what Tundra owners have to say on this!

 

I haven't heard of that, but I have heard (once) that if over-heated the rings can burn up. No idea if any merit to this. From what I understand, it is a very reliable engine.

 

My 5.7 has piston slap. It can be heard at the 4 minute mark while idling after a cold start. After it’s up to normal operating temp it settles down.

 

Hmmm, I wonder if trying a different brand of oil might help with this. No idea though.

 

Is this the same guy from ih8mud? That forum was full of... I'll be nice... misconceptions.

 

I highly doubt any mass produced engine from a reputable manufacturer will have piston slap, especially only from normal wear and tear

 

Hes been pushing this idea that American made 4.7 motors develop piston slap but the Japanese made 4.7 doesn't. Based on comments from a few mechanics. My truck has 230k on it, no problems and I don't baby it.

 

What is this ‘piston slap’?

 

Worn pistons and/or cylinders creating a rocking movement instead of up and down. Too much space for the piston in the cylinder and the piston skirt is hitting the cylinder wall.

 

Could be false / negative info. I've only heard good things about this 4.7L engine (extremely reliable, high mileage, powerful, etc.).

 

I think the OP is secretly a Ford guy

 

Piston slap in a Toyota V8? Maybe, plausible, possible.....but very rare. I've known several friends, co-workers, and had 2 company trucks, all Chevy's, that sounded like a Farmall until they heated up. Once warm they were silent. This all has to do with the tolerance being taken up as the piston expands. My last Chevy 5.3 company truck sounded like my Ford 7.3 .

Chevy V8's seemed to be plagued by this for years, I believe it's actually still a problem. But Chevy doesn't call it a problem, it's "inherent to their design and manufacturing practices". The Ford 5.4 was also hit-or-miss for slap.

Some high performance MX bikes with very short-skirt pistons have slap. But this is accepted and it's considered normal. These are also bikes that are pulled apart every 50 hours for rebuilds. I wouldn't accept any amount of slap in a modern vehicle engine.

 

I've had two gm 5.3 engines with piston slap. One developed early the other later. First one had 150k when I sold it and the other 226k. Neither burned oil or had issues related to the piston slap. I've known several others with 5.3 and piston slap along with a few fords. Never heard of it being an issue, but not saying its acceptable either.

 

Supposedly only the 2005 and the 2008 5.7 engine had cold piston slap, but I have a 2010 that has cold piston slap that lasts about 4 minutes then fades away. Different weight oil does nothing, I moved up one weight in the summer because I tow, but it the slightly heavier oil did nothing to stop the noise. By the way, if you move to a heavier oil only move up to the grade listed in your owners manual, DO NOT go any higher because you could cause the engine to fail prematurely.

My truck does burn a little oil, about a quart to a quart and half between oil changes, but todays modern engines are all burning oil, with a lot of them burning a quart of oil every 1,200 miles! Acura MDX's were burning a quart sooner than 1000 miles but those that were got new rings. Todays cars use what they call soft piston rings to lesson friction, combined with 0 or 5 weight oil and that oil easily runs past the rings

I don't think that cold piston slap is anything to worry about because I know people who have the same "problem" that still got over 300,000 miles on that engine, with reports of over 500,000 miles, so I doubt the noise is problem that will make the engine die prematurely.

 

i've never heard a 4.7 have piston slap. the 4.6 or 5.7s yes. but the 4.7 doesn't have the issue (unless its severely neglected) since they don't use those half skirt pistons

 

My 2005 GM 5.3 had some piston slap on cold starts in cold weather. I’ve never experienced or heard that with my 4.7 Yoder.

This is what it sounds like m.

 

My 4.7 doesn't burn oil. Not sure how modern you mean by modern, my Honda Element doesn't burn oil either. Only car I have that burns oil is my turbo GTI but all VWs burn and leak oil.