Rod knocking after pulling trailer up steep hill

sounds like my honeymoon good times.

 

i worked at jiffy after school, please never let them touch any machine you own, please

 

I find this thread like a very bad accident - morbid curiosity keeps me coming back. Though the stress that surges through my entire body seeing the pulled engine reminds me how little I want to ever do that. Glad others can - NOT for me. Especially one of the first pics with the wires and pipes all hanging off of it.

 

if jiffy lube was really as bad as people say, there'd be way more issues with cars.

 

Did you learn nothing from the Tacoma World wisdom of ALWAYS performing a thorough test drive?

 

no complaints here, sir. I struck gold +1 on the test drives

 

Can somebody summarize the damage? Spun a bearing? Or cracked a piston?

 

Okay, here are the rod bearing/caps, they actually look sort of okayish? None of them look horrible.





Next we're pulling the main bearing caps, then get a picture of the crank journals, etc.

I don't think I see a smoking gun yet, I've seen hammered rod/main bearings, these aren't those.

 

I saw a video/ read a post where a guy took his new Tacoma up a steep hill off roading and he had a similar outcome. The one answer that they came up with is that the oil drain holes from the head to the block/pan are too small and they filled the valve covers with oil and nothing was getting back to the pickup screen. How do you prove this, I dont know.

 

This truck has been off highway more than most, not hammering up rock piles, but it's where it lives, so there's dirt. If we need something more serious we grab the Land Crusher, but this truck does surprisingly well.

I'm hoping to find a smoked bearing on one of the rods, haven't found it so far. Keep in mind, the rod wasn't knocking like it was coming through the block, but it was definitely a rod knock type sound, and what we've seen thus far justified tearing it apart. Hopefully it will help others who want to do it know what they are in for.

 

Give the wrist pins a good wiggle too.

IIRC, the PCM should have allowed you to kill injectors individually to isolate the cylinder…

 

Plastigage check?

 

I have to deal with Quick Lube Services shenanigans more than I should..

Guess who's responsible for this motor, and who had to pay for the customers Rental, Parts and My Labor to install a complete Long Block and Turbo?

 

Will plastigauge it when we're trying to spec out new bearings, but a rod knock bearing should be pretty obvious.

We'll pull off the cam journal caps and take a look after the crank.

Did you go through a lot of pain trying to get the lube shop to pay?

 

If all of those rod bearings look as good (or at least as "not horrible bad") as what you showed above, them I'm thinking there was another cause for the noise you were hearing.

 

Very much looking forward to seeing those pictures. The rings and cylinder walls will hopefully fill in the blank pages of the story. Based on what we've seen so far, I'd expect to see that the rings are gunked up and probably stuck, and scoring on the cylinder walls.

 

wow I've seen a lot of messes over the years.... but: wow

 

OkieDokie: Promise!

 

Wouldnt it suck if this was the knocking bad vacuum pump, instead of a rod knock? There is a TSB for the vac pump noise. But, even so, there was something going on with the oil quality, filter replacement, and service intervals, in this motor. Ski

 

Okay, first culprit located, piston scoring bore in #6, guessing some variant of piston slap was what I was hearing. Can you bore these blocks with normal shop stuff? I thought they had some weird custom bore coating or something and needed a hyper precise bore tools, meaning few shops set up to do them? My finger nail catches on it, but only barely. Don't think it will hone out, but maybe it will? Now that we actually located part of the badness, probably time to talk to the dealer about the issues, since clearly oil failure was a contributor, and they did all the oil.



Wrist pin was pretty tight too. Here's one of the mains that had some scoring:


And a little on the crank journal. I'm guessing the machine shop can fix the crank, not too bad.