Turbo Picture Location

I looked for the turbo and tried to figure out where it was located based on your picture but didn't have any luck. Were you under the vehicle when you took the pic? I rolled under and couldn't see much due to the plastic rock deflector.

 

I looked for the turbo and tried to figure out where it was located based on your picture but didn't have any luck. Were you under the vehicle when you took the pic? I rolled under and couldn't see much due to the plastic rock deflector.

The belly pan needs to come off and then everything is in plain view. Down low, in the front-ish part of the motor. Remember the turbo is driven by exhaust gasses. Just follow the pipes.

 

How loose are we talking here? Also, there's a thread with info on how to obtain the service manual for around $35

 

It hard to say without the correct torque specs as I didn't want break the bolt, but with tightening with a regular wrench it close to half turn and i think i can get another 1/4 to 1/2 on it. I put under 10ftlbs on it.

I'm wondering if these are the same bolts others have had issues with but not so sure, because i thought there was mention of 3 bolts. I will say these bolts didn't have any paint markings and alot of the others did. The heat cycling going probably speeds up this issue???

 

Does SOA take reports of such findings as loose bolts even if they don't have the opportunity to verify the "degree of error" before the owner corrects the situation? Or do they somehow "refuse" to take such a report?
@MAGNUMB, when you mentioned "paint markings" do you mean that the markings would have been placed for some visible indicator of correct tightness, or is that an indicator of some type of "loctite" being applied?

[pls be gentle in replies to what might seem obvious for those super-heroes who do their own car maintenance and replair]

 

It is common from industrial applications, commercial, infrastructure, vehicles, equipment, etc. that when you have bolts that need to be tightened to a specific spec, or that are very critical, that either a paint/marker or other indicator is used to show the position of the bolt or nut when it was last torqued or verified/inspected. Some bolts on vehicles are like this from the assembly line and inspection. It varies which are marked, mostly up to each OEM/plant.

 

So my previous understanding was the loose bolts were on the exhaust flange. That looks to be on the inlet.

 

That's what I thought. So this is new discovery.

 

Hopefully they remembered to torque the connecting rod end cap bolts.

 

All I'm saying is without a torque wrench you don't know how much torque was applied and you don't know what was called for. 10ft-lbs is really light. Like resting your arm while holding onto the wrench will be close to 10ft-lbs. So if you pushed or pulled I'd bet you were well over 10ft-lbs.
You could be right, they could be loose but without knowing what is needed on the vacuum side of the turbo you can't really say they were loose from spec.

 

I understand what you are saying, but resting your arm on a 5-6 inch wrench does not get 10ftlbs. Replaced spark plugs on my Legacy this weekend which called for 13ftlbs and used about a 9" torque wrench and it was a lot more than resting just your arm weight.

 

Torque Specs

So

• The three (2 sets of three) turbo stud bolts are 10.8 ft-lb torque
• The two water pipe bolts are 23.6 ft-lb torque
• The three bolts on "intake duct" #3 are 11.8 ft-lb
• The two bolts on intake duct #1 (I think that's what's on your pic) are 4.7 ft-lb

Hope that helps.

If you post a pic showing more of that area, circling the bolts again, I will match it up to the diagrams and let you know. But, from what seems like a duct on the left side, it looks like it's Intake Duct #1, and thus 4.7 ft-lbs.

 

So

• The three (2 sets of three) turbo stud bolts are 10.8 ft-lb torque
• The two water pipe bolts are 23.6 ft-lb torque
• The three bolts on "intake duct" #3 are 11.8 ft-lb
• The two bolts on intake duct #1 (I think that's what's on your pic) are 4.7 ft-lb

Hope that helps.

If you post a pic showing more of that area, circling the bolts again, I will match it up to the diagrams and let you know. But, from what seems like a duct on the left side, it looks like it's Intake Duct #1, and thus 4.7 ft-lbs.

Thanks!! I'll check these again. Maybe they were ok!! 4.7 is nothing for a bolt of that size...very odd. Does it give you bolt size?
I'll take another picture in a weeks when i change my oil and i'm under there.

 

Cool. Thanks!
My bad...they were probably ok, but hard for me to believe that they only require 4.7 being 12mm or bigger bolt. Mine are probably double that now and i feel they are still slightly loose.
I leave them for now and maybe check them again after a few more oil changes.

 

So is it safe to assume the Turbo bolts weren't lose and we can edit the title to reflect that?

and not cause a panic...

 

So is it safe to assume the Turbo bolts weren't lose and we can edit the title to reflect that?

and not cause a panic...

Fixed that for you

 

You can see a little rubber o-ring in the diagram. these would be similar to what has been used in the past on the turbo-to-TMIC joint and the BOV attachment for the EJ turbo motors. They don't require much torque. Mine are all over-torqued just as a result of me working on them.

 

Its not stretch, its "necking" -


https://en.wikipedia.org/wiki/Necking_(engineering)

 

Its not stretch, its "necking" -


https://en.wikipedia.org/wiki/Necking_(engineering)

Definitely not necking. Necking is associated with plastic deformation. We're stretching the bolts but well within their elastic deformation range. They'll return to their original size and shape.

 

Could it be that the relatively low torque spec for these particular bolts is for the purposes of accommodating thermal expansion in the parts? If yes, then if they are now over-torqued the forces resulting from said expansion will have to be accommodated somewhere else in that assembly...

 

Good question



Good question. There's no indication why the torque specs are what they are in the service manual. lain: