Started violently shaking at 70mph. Cyl#5 broken valve spring

It is much more simple

Just need the vin # and you can have a Toyota dealer pull the history corresponding to the vin # showing all service and warranty work done by any Toyota dealership.

I sold a Toyota Tundra and provided any prospective buyers with the vin # so they could contact a dealer and obtain all the history of the vehicle prior to purchase.

 

In for certification

 

Yep......some are more certifiable than others.

 

You are right. He is the coolest gramps on the planet. Was rolling around in his STi calling people 'bro'. Probably had a flat billed hat on as well. My thinking is what makes him the most angry with this is that he can't lower the back for that squatted look which is so popular with the grey hairs these days because his truck is in the shop.

 

Haha well at least he’s being irate over a Tacoma having an engine failure after 4 days, not getting all jacked up over some post on TW.
Carry on boys

 

Okay, I will pipe down a bit. BUT, I at least want to see footage of OP going into the service manager's office with flames coming from his eyes and lightening bolts from his arse. Only way your coming with a Pro is with some eye ball flames

 

Now THAT was funny!

 

Show me your internet credentials.


SAY IT!



SHOW ME YOUR INTERNET CREDENTIALS!



Congratulations, you're still allowed to post to Tacomaworld.

 

Nawwwww, you looking at it all wrong. the OP came to TW just to start a dumpster fire. Literally he made an account and started this thread and has had zero interaction anywhere else in the forums. We are merely indulging the intentions of the “old guy” (he’s probably in his 20s)
It’s nothing short of TW entertainment.
Ps, a broken valve spring is as much a engine failure as a failed CPS sensor or the fuel pump failures/recall going on now. It’s just 1 part of a working engine. Change that 1 part and it runs again.

 

You got a point there

 

lol....the irony here

 

Well we all have our opinions haha. But a broken valve spring is not equivalent to a failed sensor bud.
https://www.wilhelmautomotive.com/car-care-tip-how-broken-valve-springs-can-affect-your-engine/

 

What the OP forgot to tell everyone is that the valve spring broke because he was experimenting with high lift cams and didn't upgrade the valve springs to accommodate the aftermarket cams. Maybe the valve started to float a bit at high rpm due to stock valve springs, nicked the piston crown and boom!

Just adding some comedy OP..

Also, if one valve spring can easily break and they are all the same, that means there are 24 potential disasters just waiting in side that Atkinson cycle double cam 3.5 V6.

Atkinson-cycle engines originated in the 1800s and used complex mechanical linkages to adjust the length of the connecting rods; today it's done with variable valve timing. The 2GR-FKS uses Toyota's variable valve timing-intelligent wide on the intake camshaft. The controllers are actually in the hubs of the cam gears and are actuated by oil pressure through solenoid valves operated by the powertrain control module. The system can change valve timing within a range of 80 degrees. Variable valve timing-intelligent on the exhaust camshaft changes valve timing as much as 51 degrees. During cold startups, the intake valve defaults to an intermediate position, while the exhaust valve is advanced. During partial-load Atkinson operation, both valves are retarded. As the engine transitions to higher load, the intake valve timing is fully advanced and the exhaust stays retarded.

 

Over 121K on my truck and no engine problems in the more than 11 years I've owned it!

 

If this is something that is truly affecting the #5 cylinder, I'd spend less time looking at the springs and more time looking at the machines that put the springs for the #5 cylinder on. I could see an intermittent problem with one of the engine building machines where for some reason the spring on #5 cylinder gets damaged during the install process. Not damaged badly enough to be readily visible but damaged enough to fail shortly into its service life.

 

@Louisd75 If your statement is accurate, then there would be a consistent issue with #5 cylinder on all the engines that were built by that assembly line.

You can have faith that Toyota knows which engine was built on which assembly line and the date built. Standard manufacturing practice.

 

It wouldn't be consistent if it were intermittent It could be an issue where most of the time it grabs the spring correctly, but for whatever reason it sometimes grabs it just the wrong way and it gets damaged on install. I have zero doubt that it would take long to narrow down the machine that caused the problem, though it might take a while for Toyota to pick up on an issue. The problems have to have a chance to manifest themselves. I think it's much more likely than a bad batch of springs somehow all getting installed into the same cylinder, if indeed there is a cylinder specific issue.

 

You are correct, my opinion is based off of my experiences as a machinist and engine builder many years ago. I won't guess where your opinion is based off of but I was the guy that the people in your article would send the head to to get fixed
Didn't say they were equivalent, I said none of those things failing would be considered a lunched motor. His valve spring broke (but didn't drop) while driving so it quit running and he pulled to the side, not an engine failure.
If a CPS fails (Tacomas had a recall for this already, I changed mine proactively) guess what happens? Engine quits running and pull to the side of the road, not an engine failure.
Fuel pump fails (current recall going on) engine quits running and you are on the side of the road, not an engine failure.
All of these things have a dead engine while driving creating a very dangerous situation but none of those scenarios have a failed engine.
Fix for all of these issues? replace the part and the engine runs again. That's the similarity
Glad to see you getting all jacked up in this thread too Welcome to the fray my friend

 

Haha nothing to jack here. A sensor failure vs pulling heads and replacing valve springs.. and potentially other damage... hmmm I’ll do the sensor job, you can take that minor spring replacement haha.
I’m the guy who rebuilt his engine and pulled the heads off to have them machined.