Position of 2 studs/nuts vs 10 bolts in bottom oil pan

The bottom oil pan has 12 attachment holes, 2 torx driven studs with nuts (picture left) and 10 bolts with gaskets/washers (picture right). It's been awhile since I took it off and the 10 mm socket when applied to the nuts actually removed the studs also so I don't remember where each one went. Does the position matter or can I just randomly distribute them? I looked in the manual and it doesn't provide detailed enough a diagram.

Also, should I first torque the studs with a (size 6?) torx socket and then torque the nut over separately with a 10 mm socket or is it okay if I just torque both with a 10 mm socket all at once?

 

You are correct, the manual doesn’t say.
But it does show 2 different one pictured.
Notice the 2 circles in the bolt head? If I were to guess, that’s where they go?

 

What he said ^^^^

Properly you should install the stud Then install the nuts when doing the pan to engine assembly.

 

Yes sir

Those studs help you “guide it on straight”.
Since you FIPG or RTV.

 

Took me a few mins.
But these pictures seem to confirm the diagram above
https://www.tacomaworld.com/threads/oil-pan-leak-help-questions.255284/#post-6192231

 

What does FIPG/RTV stand for?

 

FIPG = Formed-In-Place Gasket = the gasket you buy from the store

RTV = Using RTV sealant only to "make" your own gasket and not using the factory gasket.

 

FIPG = Form In Place Gasket.

RTV is the goop in a tube. It needs to be compatible with oils.

Install the 2 studs as guides. Place a bead of the RTV on the pan flange. Slip the pan into place, install bolts & nuts, hand tight. Then torque up in a couple steps. Use a skip or cross pattern when torquing.

Remember to clean the mating surfaces as best you can.

 

Room Temperature Vulcanization (RTV)

 

Oh but there is a gasket and it came with 3 tubes of RTV sealant

 

Choose one. Not both.

 

I think the factory had both. It was the first time I took it apart. There was a gasket AND remnants of the sealant. Also, why would the package of the replacement come with both if only one is needed?

 

I could only make a guess as to "why?".

Is either gasket surface nicked or scratched? If so, then RTV is probably the better choice.

Sometimes the RTV is used to hold the gasket in place during assembly.

 

I mean, can it hurt to use both?

 

Interesting, as I see no gasket listed/shown on parts.toyota.com. Furthermore, looking at the FSM I see no mention of any gasket in the IPB nor in the removal/install procedures (only the FIPG is shown).

 

I don’t think Toyota uses a gasket when replacing the lower pan.
Would it hurt to use a gasket? No, probably not.
If I were replacing in the pan with an after market pan, I might consider using the gasket and the RTV. MAYBE

I bet @Bishop84 knows? He’s probably done a few.

 

RTV.

The 2 studs are for installation, they don't matter where they go, just make sure they are spaced opposite each other.

I don't torque oil pan bolts. I gently install them with a 1/4" and snug up evenly. Then re-tighten again after its cured for a few hours, then run for a few minutes.

 

Thanks buddy.

BTW, OP

He is serious on those bolts.
See here for what could happen.
Plus other info - https://www.tacomaworld.com/threads/replacing-oil-pan.289616/#post-7266921

 

So a Victor Reinz gasket with Fel-Pro RTV. This seems like a gasket/seal kit for imperfect sealing surface repair. Where exactly did you get this? Did it come with any kind of instructions?