brittcrowell

Found Intake leak! Lots of work to do now......

So I finally got some time to look for my intake leak that you guys said I probably had.
The hose that goes in to the throttle body had a good crack in it. Pretty easy to see after getting all the covers off and having a good bright day. So I need to order that part. Looks like a PITA to get to the bottom part of it. I was thinking about taking the throttle body off and cleaning it good while I was at it. Also the front breather hose is super soft. Feels like I could put a hole in it with my finger nail. So I'm sure I need to replace that and the other two (3) rear ones too. I also need to do a valve cover job. So I plan to tackle all of this at the same time since it is all about in the same place. I have Paul's valve cover page printed out and have read about the breather hoses. I guess at this time it would be good to replace the rear cam shaft seals? Also ordered the Bentley CD last week so I should have that shortly. Any think else I should know??

Break down of what I'm going to do:
-replace breather hoses
-remove and clean throttle body
-replace rear cam seal/covers
-valve cover gaskets
Anything else while I'm in there?

Timing belt is next on the list.

Any one know a good place to get EKTA while I'm at it???

JimR

I'm thinking about all of that, too, while doing my timing belt.

Already have the rear breather hoses, and have ordered the valve cover gaskets with the TB kit order.

Angus Beef

I ran out of time and oly got the right side (drivers) rear breather done. Need to get to the other. Also cleaned the throttle butterfly- was amazingly dirty (~140k at the time).

ex-a8drifter

Be very careful with that upper radiator hose...its a real bitch if you break the hose fitting.

escapA8

As you probably already know it breaks VERY easily. Hose costs around US$130.

JimR

I probably should order one, though.

Whiplash-Smile

Where is it located?

ex-a8drifter

I got mine for 108 at Fred Baker...with Uncle Sam's cut, it came to about 116

ex-a8drifter

<center><img src="http://pictureposter.audiworld.com/77296/breatherhoses2.jpg"></center><p>

-OvO-

there is a little one in the center, I think I used 8 mm fuel hose for that. I posted about it in this forum sometime since June.

I took the intake manifold off to get at the rear hoses. It might be possible to do the big hoses another way, but you will never get at the center one. That center one *snapped* in two on me.

If you pull the intake manifold, you must be very careful not to drop crud/sand into the cylinders, so you should have an air compressor handy to blow all the loose crap off first. I didn't have one, and it was hard to get the thing clean enough first.

I found a lot of carbon around the valves, but I was reluctant to clean it up much since I couldn't do the job thoroughly, and I had a feeling that half a clean-up would be worse than none. I just wiped off the loose stuff.

To pull off the intake manifold, you must first remove the fuel injectors and rails. Bentley's calls for replacing the injector o-rings, the dealership I spoke with said that they never do. Your call. Make sure you order the right o-rings, there is a smaller one that goes in a different place.

Getting the intake manifold on and off is a little tricky, only because it's fairly heavy and a long reach out over the engine to grab. Also, the gasket may be a little bit stuck. You don't want to ding up any of the machined surfaces! That step works well if you can find a friend to help you lift it, after you have removed all the hardware and such.

If you pull the manifold, look for a short length of coolant hose in the back of the engine, right under where the throttle body was. If you can reach it, I think this would be a good time to replace it, since it would be a screaming pita to do any other time - unless you pull the transmission.