[Exhaust](/topics-exhaust-toyota/) leaking thru ac vents

[Exhaust](/topics-exhaust-toyota/) leaking thru ac vents Mechanic's Assistant: How old are the hoses? And what driving conditions do you most often encounter? Exhaust leak Mechanic's Assistant: What is the make/mo...

[Exhaust](/topics-exhaust-toyota/) leaking thru ac vents Mechanic's Assistant: How old are the hoses? And what driving conditions do you most often encounter? Exhaust leak Mechanic's Assistant: What is the make/model/year of your car? Toyota RAV4 2006 Mechanic's Assistant: Are you fixing your RAV4 yourself? What have you tried so far? Nothing Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? Exhaust makes hotrod like sound

Automotive Expert
Hi, my name is\*\*\*\*\*’ve been a technician on Just Answer since 2007 and I'll be helping you today. I'm sorry to hear you are having difficulties with your vehicle. I know how inconvenient car trouble is, but together, we will get your vehicle back up and running quickly. May I ask whom I am chatting with today?

Good morning Mike my name is Lucy
Automotive Expert
Good morning Lucy, it's nice to meet you. Sorry you are dealing with this. It sounds like either the exhaust pipe is broken or the exhaust manifold. It's likely up at the front of the [engine](/topics-engine-toyota/) since it's coming in through the vents. Is the car a 6 cylinder or 4 cylinder?

6 cylinderI am not sure which one of the manifolds it could be
Automotive Expert
If you can look at them, you might see which one is split or cracked. It''s possible the flange on the front exhaust pipe has broken off as well. You might want to take it to an exhaust shop and have them take a look. Even if you do the repair yourself, if they can get it up on a lift and check it, most will give you a free estimate. That's if you don't see any cracks from under the hood.

Thank you
Automotive Expert
You're welcome Lucy, have a good day.

I also replaced intake manifold rubber gasket and it came with 4 metal gasket that don't like up or fit in intake manifolddont line up
Automotive Expert
Did you replace the upper intake or the lower where it bolts to the cylinder heads?

Upper intake, how do I reach the lower one where its behind engine not the by the [radiator](/topics-radiator-toyota/)
Automotive Expert
The lower intake is under the upper intake. The gasket set you had is likely for both parts of the intake, upper and lower. To remove the rear exhaust manifold, you likely have to work from under the car.

Is the lower and upper intake attached togetherOr is the lower intake the same as rear exhaust manifold
Automotive Expert
These are 2 separate pieces the intake manifold is where the fuel and air is coming into the engine. The exhaust manifold is where the exhaust leaves the engine after combustion. They have nothing in common other then being called manifolds.

Where is lower intake
Automotive Expert
The service manual doesn't seem to have a diagram of it, so I am sending this photo, I have circled the upper intake manifold, the lower intake is below it.

Would that be the lower

Customer attachment 1/15/2021 12:54:17 PM
Automotive Expert
Yes, that's the lower intake manifold. You should or usually you will have 2 metal gaskets where it seals to the heads.

Got it thank you for your patience
Automotive Expert
You're welcome.

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