Upper oil pan fit between 1FZ-F & 1FZ-FE

[thebill]

94 FZJ73 with the 1FZ-F

I was poking around what looks like a leaky lower oil pan gasket today and checked the tightness of the bolts to find that 3 or 4 bolts’ threads seem to be stripped out of the upper pan.
There is a remanufactured upper and lower pan from a 93-97 Land Cruiser with a 1FZ-FE on ebay for a decent price that I’d like to confirm would fit on my 1FZ-F. I don’t know what year and model they are from specifically but have a note in to the seller.
Can anyone shed some light on wether these are interchangeable between the -F and -FE?

thanks!

 

[SNLC]

What exactly is a remanufactured upper oil pan?

There is nothing to the pan to reman. It has a windage tray, a pickup, some holes in it and that is it.

I would pull your upper pan and just fix any stripped out holes vs buying some ebay whatever it is.

Cheers

 

[thebill]

What exactly is a remanufactured upper oil pan?

There is nothing to the pan to reman. It has a windage tray, a pickup, some holes in it and that is it.

I would pull your upper pan and just fix any stripped out holes vs buying some ebay whatever it is.

Cheers

Thanks for chiming in. Per the description, it’s been pulled from a wrecked truck and probably blasted clean. You’re right; remanufactured is probably an ambitious choice of words for what the part is.

The growing trend and theme of this project has become one of “what else?” Essentially, for every one thing I’ve identified needing to be repaired or replaced, there are several others attached or associated which also need to be dealt with, replaced, or added to the list. In short, my assumption is that it’s never seen any regular maintenance and I’m now atoning for that. Given this, to be able to replace something for a reasonable cost looks better to me than fiddling with rethreading or inserts.

So, are the pans the same?

 

[SNLC]

The only difference I could imagine would be oil level sensor port or not. Never worked on a carbureted 1FZ or one in a 70 though.

Do you have an oil level sensor in your pan?

Cheers

 

[thebill]

The only difference I could imagine would be oil level sensor port or not. Never worked on a carbureted 1FZ or one in a 70 though.

Do you have an oil level sensor in your pan?

Cheers

Thanks, and sorry for getting a bit passionate with that response.
I don’t know the answer to the sensor question, but the block diagram doesn’t show a sensor, and there isn’t any wiring coming off my pan.

 

[SNLC]

If you have no port in the upper pan then you don’t have the sensor. The LX pan has the port.

Cheers

 

[JuanJ]

Hello,

The 1FZ-F and 1FZ-FE engine blocks are different. The latter has provisions for EFI sensors, among other things.

When Toyota designed the 1FZ engine, they chose to divide the oil pan into two pieces. Furthermore, they made them in aluminum. They did so because the 1FZ block's alloy has a different behavior under load than its predecessors. A divided oil pan bear load stresses more efficiently than a single pan.

It is quite common that abuse causes the bolts to loosen. The average SA mechanic overtightens to compensate, breaking bolts in the process; torque wrenches are rare over there.

If the other bolts are tightened to specification, and the gasket is in good shape, there should be no leaks.

The refurbished part may not fit in your engine without modification. Keep in mind that it is intended to fit a different engine block.

It is better to use 1FZ-F specific oil pans, both of them.






Juan

 

[thebill]

Hello,

The 1FZ-F and 1FZ-FE engine blocks are different. The latter has provisions for EFI sensors, among other things.

When Toyota designed the 1FZ engine, they chose to divide the oil pan into two pieces. Furthermore, they made them in aluminum. They did so because the 1FZ block's alloy has a different behavior under load than its predecessors. A divided oil pan bear load stresses more efficiently than a single pan.

It is quite common that abuse causes the bolts to loosen. The average SA mechanic overtightens to compensate, breaking bolts in the process; torque wrenches are rare over there.

If the other bolts are tightened to specification, and the gasket is in good shape, there should be no leaks.

The refurbished part may not fit in your engine without modification. Keep in mind that it is intended to fit a different engine block.

It is better to use 1FZ-F specific oil pans, both of them.






Juan

Thanks, Juan. I discovered some stripped-out front hub bolts over the weekend, so I'm coming around to the reality that helicoils are a much more reasonable solution especially in low-torque applications. Thanks to @SNLC for the initial nudge in that direction. Practicality and ambition unfortunately won't intersect on this particular fix.