3VZ-FE questions

[deepsun]

Hi there,

I have some questions regarding the 3VZ-FE engine, maybe someonet out there can make my day and answer some! Thanks in advance!

- I heard that people re-use the headbolts upon a headgasket swap and just torque them down more than stock. Does that hold? How much should they be torqued then? Or should one always use new torque-to-yield bolts?

- I read that the stock 3VZ-FE is seriously de-tuned due to too rich fuel management (can only be overcome by changing the ECU) and conservative cam timing. The cam timing could be overcome by rotating the distributor... Does anyone know how much and in which direction?

Thanks a lot for answers!

Cheers,
deepsun

[itlnx]

Search engine is your friend!

[renmike]

Originally Posted by deepsun

Hi there,

I have some questions regarding the 3VZ-FE engine, maybe someonet out there can make my day and answer some! Thanks in advance!

- I heard that people re-use the headbolts upon a headgasket swap and just torque them down more than stock. Does that hold? How much should they be torqued then? Or should one always use new torque-to-yield bolts?

- I read that the stock 3VZ-FE is seriously de-tuned due to too rich fuel management (can only be overcome by changing the ECU) and conservative cam timing. The cam timing could be overcome by rotating the distributor... Does anyone know how much and in which direction?

Thanks a lot for answers!

Cheers,
deepsun

I would never recommend reusing head bolts. After the first time you torque a bolt, it stretches slightly. When you use the bolt, and even if you retorque it, there's a greater chance that it'll break.

As for your second question, there are a couple of different options you could do in terms of using the timing or fuel/air mixture to adjust the tuning of these engines. You could adjust the timing via the distributor or pop the top off the mass air flow sensor and adjust the gear a few notches. I don't remember the exact direction or now many notches, so I recommend searching for these posts.

[SlammedSix]

Just adjusted my timing on my 92 Camry SE, man o' man a nice difference.

My timing was sitting at about 6-7 deg. which was a little under the factory 10 deg, but i bumped it up to ~15 deg and it definately is more peppier.

[deepsun]

thanks a lot for the info, guys!

[decrypted]

i have a question, what size are the head and cam gear bolts on the 3vzfe engine, i think its 14mm for the head and 17mm for the cam but im not sure .