I had a knock around 50,000 miles, missed the warranty by 4 miles....ended up being a main bearing....ended up at the dealorship and 4000 dollaz in da hole....sad year for turbo'd dreamz...but at least it's like a got a fresh engine for a turbo now...woohooo

 

This is similar but simultaneously off topic...my "knock" sound went away today. biggest change is a drop in humidity and temperature of about 60 degrees compared to 80-90.

What could this be? I'm thinking possibly a timing /knock sensor issue thats temperature related? anyone?

 

Sigh... So i brought it to the same dealer that replaced my blown transmission (@45k). Had a tech drive with me and he cant pinpoint exactly what it is but he told me its major. Considering Ive now burned through 2 1/2 quarts of oil in 2 weeks and it seems to be getting worse, id say its major too. Since I have the TRD supercharger, the service writer told me the car is TRDs problem and not toyotas. One of the TRD guys needs to come down and check it out before we can get the ball rolling. Looks like i need a new engine but it should be covered under warranty.

I'm very disheartened towards my scion and its name. At 45 my tranny blew, at 46 my first SC blew, and now at 55k my cat and engine have died. Doesnt make sense too me. How can my weak a$$ supercharger destoy my tranny and engine when there are plenty of you guys out there running 10-12 psi on stock internals. Why do i always get the lemon. The car has been meticulously maintained since i drove off the lot in the summer of 05 with only 2 miles on it. This is strike 3. Ive lost all confidence in scions reliability.

 

Honestly u statistically might have got the bad apples. Supercharger never had a good rep, and might have messed up motor. What was deal with trans though?

 

im about to get a new trans at 120k but it needed it at like 60k just too much money

 

The tranny always had a loud "whurrrring" noise in all gears. Right around 45k it was making a horrific grinding noise going into 2nd gear both upshifting and downshifting. It got so bad it eventually refused to let me into the gear all together so i would just 1st to 3rd it. Took it to the dealer and they said it was the synchros. They dont fix trannys they just replace em. Got the new tranny under warranty, shifting is smooth with no "whur".

 

Hey at least it's under warranty.

 

Official word: PISTON SLAP

So the manager took it for a ride again today and said he heard the noise loud and clear. No question its piston slap. Apparantely theres too much clearance between the piston and the cylinder wall. This explains the oil consumption, the noise during acceleration and why the pre cat failed. He's gonna warranty the short block. That brings the total for warranty work done on my car to a staggering $14,000!!! Almost the price of the car it self when new. I mind as well switch the odometer back to 0 at this point. He doesnt think hes gonna need oil recipts because the oil was in decent condition when he last checked. Recently he had a Camry come in with the same problem so that gives me a glimmer of hope that maybe its not the SC causing all this havoc.

 

...but what could have possibly caused such a debacle?

 

the SuperCharger you had, that's what killed it. That's why Toyota got rid of it later on, it was causing way too many engines an early death. They quietly discontinued it.

Glad you're getting it fixed!! That's GOOD news!

 

Yea i'm glad too. The powertrain is essentially brand new now.

...but im just not gonna put any blame on the supercharger. Ive never heard of a 2AZ engine blowing because of a properly tuned (TRD reflash) and properly installed supercharger. There is absolutely no proof to say the supercharger caused the piston slap and the dealer doesnt think so neither. After diagnosing my engine i went to the web and was amazed to find how many NON FORCE INDUCTED vehicles have the same problem. Its widespread with GM and subaru and itsbeen known to happen in 2AZ Camrys as well. The only reason TRD superchargers get a bad rap is because you only see threads from the people with the issues. There are PLENTY of happy supercharged owners out there that have had NO problems (and i was 1 of them until a dealer reinstalled my old 1 wrong when replacing the tranny and it blew a day later) but you wont hear from them. There are alot of dudes on here that will back my defense of the supercharger (TourqueTC, BlueMeanie, ect...). TRD only stopped making SC because the 1st gen tC was reaching the end of its life cycle. Trust me man... I GOT A LEMON.

 

i think im having the same noise. my 07 has 53k on it, very strict regular oil changes, fresh tranny fluid (5 speed), and im getting the noise on the right/ passenger side. it almost sounds like a heat shield rattling but they are all tight and i can kind of "feel the noise" with my hand on the oil pan. im planning on dropping my oil pan and checking the rod caps, ive also read that the water pump bearing goes bad quickly and starts to wallow out the hole its in. looks like im also pulling my head off and doing some top end work. ARRRGH!! my engine hasnt destroyed itsself yet so im parking the car for now. i have raceland cold air intake and megan axle back and dont have the oem stuff cuz im an idiot so my warranty is effed. anybody know roundabouts how much its gonna cost me to fix? i have no problem replacing the parts as long as theres no machine work required if anybody can hook up some info on anything here it would be much much obliged!

 

i think someone is selling a oem intake in the classifieds. and an axleback shouldnt affect u at all unless you bought ur car from hitler... oh wait...

 

the service guy i talked to at the dealership i bought it from sounds pretty cool on the phone but i cant rely on that obviously. i bought the platinum warranty (7years/ 70k) with the car, and i have receipts with mileage from all the oil changes, so im hoping they might be kind of leniant as far as the bolt ons go. im heading to a different dealership in half an hour to have a tech take it for a spin and give a listen. i will let yall know what he says!

 

so i had a tech take it for a ride. about 30 seconds later he comes back and pulls it right in the garage and pulls the belt off and tells me that the waterpump bearing is shot. like it was leaking pretty good but it wasnt dripping underneath the car so i didnt see it. still under warranty and it will be back on the road tomorrow!

 

oh and the service manager told me since my intake or my axleback were not directly related to the incident they didnt void my warranty. so thats also a thing to take note of. he told me if i would have had underdrive pullys or something like that i would have been effed.

 

whew! at least it was JUST the water pump dying on you! and not the engine itself like the crank, bearings, etc. You're not alone in the water pump failing dept, you can search the forum.. there were others that had this issue. We never did figure out what batch was affected, it was just hit and miss. Glad you're getting it fixed. Might want to get a new drivebelt while you're replacing it. That way you won't have to mess with the belt for a long, long time.

glad everything is working out for you! always nice to hear good news

 

yeah i did some searching around on here and basically had narrowed it down to piston slap or water pump... soooooooo glad it wasnt option 1 lolol