Opinions on Rebuilding 2UZ in 2019 (1 Viewer)

[YardPig]

Used 2UZ, do the required maintenance and slide it between the fenders. End of story. You guys overthink things waaaaay too much.

 

[suprarx7nut]

Came across this today:

Didn't catch if they messed with boring at all or just cleaned up the walls with a hone. Either way, 2UZ rebuild completed successfully with a broken rod in number 8.

 

[2001LC]

Sweet! Thanks for post the video. That Tundra is the first video (or write up) I've seen of a 2UZ rebuild. Watching it I recalled a local mechanic telling me of a rod he replaced in a US made Tundra 2UZ. He said client asked him to just replace the rod and nothing else. Not even rings or bearings, nor hone cylinder. He did and after 100K miles it's still running strong and isn't smoking.

These duds in the video had shop with plenty of room & tools, so sweet! Nice holder for valves even had valve lapping tools, and I possibly saw a valve guide & grinding tools. That shops' seen a few engine rebuilds. Makes me want to rebuild one or two.

Dud, had a ton of new parts for his 2UZ. I looked a little deeper and saw the Owner of Tundra did not tack cost, just estimated $2k to $3K. He obvously keep cost down. Things that keep cost low was like only had block resurfaced. Did cleaning themselves, even sand blasted with friends SB. Also keep parts cost down, as purchased many made in China like pistons, over haul kits and Bosch o2's vs OEM. I suspect they hone cylinder themselves, based on clues in video, like a statement made, I also noticed #6 cylinder wall has pitting assemble. Machine shop general machine hones and take down cylinder wall far enough to get at mild rust pitting. I suspect rust as he stated hydro-locking broke rod.

 

[Moore80]

I finally got the bad cylinder leakdown tested, 80-90% loss coming from the bottom end. Looking through the bottom end (oil pans are off), I can see that there isn't much damage to the cylinder walls at TDC, but I do see some minor discoloration and significant bad smell. I also don't see much damage, if any, from the scope (although my scope sucks). I'm now going to valve cover and head to survey the damage.

Thanks @suprarx7nut for the step by step, and @2001LC for constantly answering my questions.

 

[2001LC]

What reading did you get on the other 7 cylinders for comparison?.

Here's what I could see with mirror on $40 bore scope.
Hone marks are gone and cylinder wall is covered in vertical lines.

 

[2001LC]

Resolution a bit better here. Trick with these $40 bore scopes is to get distance just right, mirror clean and set just right on tip of camera. My camera has threads on tip, that makes fixing distance and angle on tip a bit more precise. Had to play around a lot whit it.

Here a good cylinder

Without mirror the straight on view is not bad

2UZ-fe VVT Cylinder #6 badly scored form blown head gasket dumping coolant into cylinder

There are companies out there that sell and rents aircraft quality cameras with articulating camera tip.
VIVIDIA ABLESCOPE VA-400 INSPECTION BOROSCOPE from Aircraft Spruce

Pipe Camera Rental - USA Borescopes

 

[2001LC]

If you think my camera view better than yours. Then you can borrow or buy one of mine, I've two of them.

 

[2001LC]

This engine overheated badly. In the bad cylinders that must have gotten red hot, piston is a darker color.

Good for comparison

I was looking for one picture of cylinder wall from back. This one is oily so can't seeing wall clearly. I really don't recall seeing the bad vertical lines from the back.

 

[SF1911A1]

I’ve seen a lot of numbers thrown around for this part or that service, but just out of curiosity; what is y’alls ballpark estimate of bringing a 100 to a mechanic and having the engine completely rebuilt? Assuming I do nothing but pay the bill? I know it can vary widely based on where you go, and I know most seem to agree to just swap the motor, but I honestly have no idea what such a job would cost. Are we talking about saving ~$1,000 by swapping or more like ~$4,000 in savings...? Thanks.

 

[Moore80]

From my recent experience... all quotes are from a very fair and experienced mechanic who’s a friend of mine. $4000+ in labor to pull and replace an engine (not including cost of replacement engine). $2500+ to rebuild from the head down including the machine work.

 

[Moore80]

If you were going to pay to have the entire rebuild done starting with pulling the engine... then I would bet it’d be 9-10k.

 

[J1000]

It's Japanese. Do not "rebuild" the motor unless there is a problem like knocking or spun bearing or a damaged piston. Refreshing the head can never hurt but again unless you a measuring low compression or have proof of damage there is no point in ever opening a Japanese engine like the 2UZ. Just make sure timing belt is good, seals are happy, and you change the oil regularly.

 

[SF1911A1]

Mine runs perfectly with 250k miles so no worries here. I was just curious what the numbers looked like both ways. Looks like roughly $6k for a swap and $9k-$10k If a full rebuild was required. If/when that happens it sounds like I’ll be looking at a 200 with 150k or so miles in the $20k range for my replacement. I appreciate the input.

 

[2001LC]

I've one estimate from a Toyota Dealership for a 2007 (Unicorn), came in at ~$11.5K including radiator & hoses. It didn't specify new, used or rebuild.

Crate engine (long block) is not available from Toyota. This means short block~$4K and heads $2K ($1K ea) must be purchased separably and assembled.