Any toyota techs on the board?

Mark m. · Jan 4, 2012

I'm having issues with a 3.4 taco engine and need some help.
Replacing a 3.0 with a 3.4 Started with a known good running low mile 77,xxx engine that ran great. Got everything done and go to start it and it will run for 15-20 seconds and die. Did this 3 or 4 times figure its the fuel pump relay. Change the relay and go to start it and the engine will not turn over its locked up.
So we pull the plugs drop the pan take off all the belts and still will not even move with a 3' breaker bar. Going to check the timing belt today.
The only thing I changed on the engine before the install was adding a supercharger.
When it did start it made no funny noise at all and just shut off like it was out of fuel.
This ****er has me stumped. Any idea's.

WA-Wheeler · Jan 4, 2012

Is the harness and ecm out of the same engine? Did the taco you stole it from have the factory security bullshit. Im no yota tech but that is just my best educated guess.

Although the not turning over has me stumped..... Interested on what you find after checking t-belt..

nowires · Jan 4, 2012

Mark m. said:
I'm having issues with a 3.4 taco engine and need some help.
Replacing a 3.0 with a 3.4 Started with a known good running low mile 77,xxx engine that ran great. Got everything done and go to start it and it will run for 15-20 seconds and die. Did this 3 or 4 times figure its the fuel pump relay. Change the relay and go to start it and the engine will not turn over its locked up.
So we pull the plugs drop the pan take off all the belts and still will not even move with a 3' breaker bar. Going to check the timing belt today.
The only thing I changed on the engine before the install was adding a supercharger. When it did start it made no funny noise at all and just shut off like it was out of fuel. This ****er has me stumped. Any idea's.

I am no tech but it doesn.t sound good :booo:

Is the super charger disconected from the crank?

Glenn · Jan 4, 2012

I think Rix is a Toyota tech.

crash2 · Jan 4, 2012

Whoops....

Mark m. · Jan 4, 2012

Found it. Spun main bearing

zukkev · Jan 4, 2012

Mark m. said:
Found it. Spun main bearing

Well ****, that explains that...anything to do with the supercharger (oiling issue due to this is my thinking), or is it a 'standalone' type....

nowires · Jan 5, 2012

Mark m. said:
Found it. Spun main bearing

Dam it... Hate it when that happens. I had a motor on a dyno for 38 seconds and it went boom. That was $500 a second out the door

stealthrunner1 · Jan 5, 2012

zukkev said:
Well ****, that explains that...anything to do with the supercharger (oiling issue due to this is my thinking), or is it a 'standalone' type....

It's a stand alone blower!! Has it's own oil in the housing..:;

nowires · Jan 5, 2012

stealthrunner said:
It's a stand alone blower!! Has it's own oil in the housing..:;

Still brings the total suck to the project

CHOP SHOP · Jan 5, 2012

Good thing the 3.4 is way more reliable than a 3.0! :haha:

Thats shitty bro. :booo:

Mark m. · Jan 5, 2012

Well I guess thats the chance you take with a rig that had been rolled at freeway speed. It must of ran for awhile upside down. In about the 30 minutes I ran it it ran and sounded good but I guess it was really just about ready to die.
The good news is in the long run I will know for sure what I have when I'm done and that's pretty much a new engine.
It will be worth it when its all done. I think:haha:

CHOP SHOP · Jan 5, 2012

Mark is that bearing that failed also the thrust bearing for the crank?

Ive had rigs kill the engine after a collision cuz the endplay/thrust bearing was damaged in the wrecks impact. Only on SBCs tho.

Mark m. · Jan 5, 2012

It was the # 1 main bearing the trust washers are on # 2

zukkev · Jan 5, 2012

Mark m. said:
Well I guess thats the chance you take with a rig that had been rolled at freeway speed. It must of ran for awhile upside down. In about the 30 minutes I ran it it ran and sounded good but I guess it was really just about ready to die.
The good news is in the long run I will know for sure what I have when I'm done and that's pretty much a new engine.
It will be worth it when its all done. I think:haha:

Yup, all shiny new!

CHOP SHOP said:
Mark is that bearing that failed also the thrust bearing for the crank?

Ive had rigs kill the engine after a collision cuz the endplay/thrust bearing was damaged in the wrecks impact. Only on SBCs tho.

Have also seen this...but not just on SBC's...

Mark m. said:
It was the # 1 main bearing the trust washers are on # 2

Is #1 the furthest from the pump? I know on the Suzuki motors this is the case, as almost always the first rod or main bearing to go is at the front of the motor...although I have seen other cylinders fail due to a plug in the block's oil galley coming loose and falling out...

Mark m. · Jan 6, 2012

zukkev said:
Yup, all shiny new!

Have also seen this...but not just on SBC's...

Is #1 the furthest from the pump? I know on the Suzuki motors this is the case, as almost always the first rod or main bearing to go is at the front of the motor...although I have seen other cylinders fail due to a plug in the block's oil galley coming loose and falling out...

# 1 is right next to the.
Its toast :booo: Anyone got a 3.4 for sale?