Engine bay noise

[PradoEater]

Hi all
Been trying to chase this noise for a while now last few weeks it’s consistent, replaced vacuum lines still there, replaced belts still there.

When I actually drove the car it’s louder than stationary. Starts about 2400 rpms and goes away around 4000rpms. Tested the solenoid on top of engine bay with 12 v it clicks so it’s not stuck but can’t test it with vacuum as I do t have the tool.

One thing I noticed thou when removing vacuum hose from either the solenoid and “golden thingy” on top of the turbo it is harder to replicate but it’s still there albeit less noticeable.

I Did replace a questionable turbo side hose but it wasn’t that. Any Suggestions please share.

Keen to get to bottom of this.
Videos https://youtu.be/dcQpElpH1R8

https://youtu.be/DL7uixDwD-0

https://youtu.be/KpjMk3FD6OY

[aussieintas]

From your 2nd video showing bonnet up, to me it sounds like a bearing issue and appears to be louder at the front compared to when the camera goes to drivers side.

Could it be one of the bearings or idlers on the Air con or alternator belts

[PradoEater]

Ok so it looks like I have a missing nut and a stud from the exhaust manifold bottom side closest to radiator side.

Any suggestions and advice what’s my options here? Or best way to fix it?

This a video I found that sounds very similar to mine https://youtu.be/lybU3xnqyVM

[kblof]

sounds exhausty to me as well, no expert mind you
one of my exhaust nuts was loose on the back of the turbo making a similar sound a while ago.
where are those photos taken from with the missing bolt, just tried to finding it on mine but i cannot see where you are in your pics? lots of heat shields over exhaust manifold etc?

[PradoEater]

sounds exhausty to me as well, no expert mind you
one of my exhaust nuts was loose on the back of the turbo making a similar sound a while ago.
where are those photos taken from with the missing bolt, just tried to finding it on mine but i cannot see where you are in your pics? lots of heat shields over exhaust manifold etc?

Bolt is at the bottom closest to the thermostat housing,

It’s pain in the a** I don’t think I’ll be able to take the manifold out turbo prevents at least one bolt at the bottom to come off to take the turbo off will be also a mission by the looks of things

[kblof]

thanks - it looks to me its the bottom exhaust manifold stud and nut has come out. i tried taking a pic see below (not good) but does show a a stud with a nut same as the one above holding the manifold on.

[aussieintas]

Have a look at Partsouq.com for part numbers. And diagram bud.

Stud..........ME200011 which is M8 and 43mm long
Washer.....MF450005
Nut............ME201039 which is M8

Couple if pics below to assist. Each port on the exhaust manifold has 3 studs and nuts, so 12 in total.

Glad you found the issue, now to fix it

[PradoEater]

Have a look at Partsouq.com for part numbers. And diagram bud.

Stud..........ME200011 which is M8 and 43mm long
Washer.....MF450005
Nut............ME201039 which is M8

Couple if pics below to assist. Each port on the exhaust manifold has 3 studs and nuts, so 12 in total.

Glad you found the issue, now to fix it

I was looking at the Russian site, will be a lot of fiddling. Been looking at this kind of solution as well https://youtu.be/ypJYbKX6v5I any potential issues with this sort of fix?

[aussieintas]

Could you try a M8 bolt straight in, at least as a test or has the stud snapped off? Just wondering

[disco stu]

Not sure how the exhaust wrap repair will help your missing stud issue. I have done that to the exhaust manifolds on my NL petrol. I used different stuff available at super crap auto. I cleaned it back to bare metal, grooved it out and put the exhaust putty stuff in there. I then went over the top again with more putty stuff and some exhaust wrap, making sure it was really clean (cleaned with acetone) and back to bare metal so it will adhere properly. Engine is still out of the car, so I can't tell you how long it will last but it was a much simpler/cheaper option than welding the cracks or replacing the manifolds at $600 each or something stupid that mitsubishi wants to charge

As for your missing stud-I thought exactly the same as aussieintas. You could just whack a bolt into there instead of a stud. If you're that deperate for a stud I'm sure they aren't hard to find at a fastener place or an engine reconditioner, I'm sure they would have to replace a few. If you're extremely desperate I could probably pull one from this engine I have sitting here, but I honestly don't think its worth the effort. A bolt will likely go in just as easy

[aussieintas]

The stud being 43mm in length I was thinking if you go to local Supercheap they have those small packs of bolts, Handy Packs they're called. They have high tensile different lengths, so perhaps 40mm might do the job or even 35mm. That said the nuts onto the studs are only 30NM torque so doesn't need to be too tight using the high tensile.

[PradoEater]

Stud is snaped and half of it is inside the block will try the quick fix tomorrow I can’t see a way to take the manifold off to drill the leftover stud off

[disco stu]

Oh, that sucks!

[aussieintas]

Could you get in with an extractor set to save removing everything

[PradoEater]

Could you get in with an extractor set to save removing everything

Turbo is on the way was also thinking to remove the turbo housing to give me more room.
Anyway after revisiting the online manual I found out that one oil pipe coming from back of engine ican actually come off easier than I thought so removing the turbo and manifold if doable.
Bit late in my case as I already started the bush fix, if it works out I’ll post some pictures from the fix atm is still curing.