People are still finding a disconnected pipe or hose of the firewall below the rear window. Sometimes it's a hose, or has a metal elbow, or just a tube on the firewall.
This originally ran from the valve cover to the air cleaner (to bottom of intake tube on some).
It seems half the recalls were done by guys too lazy to remove the hose and cap the ends of the tube (or plug hole in air cleaner housing), so they just left it hanging to suck dirty engine bay air into the air filter housing - bypassing the air filter.
This change was part of the recall kit.
A new metal tube was installed that ran from the valve cover to a NEW rubber intake tube. The tube on the firewall is no longer used.
The recall is also when they removed the decklid weatherstrip on the leading edge of the decklid.
The idea was that it would allow more hot air out of the engine bay, but removing it allowed water to fall through past the window onto the engine and exhaust manifold - and the thermal shock caused the exhaust manifold to crack in many cases.
[This message has been edited by fierosound (edited 04-13-2010).]
I still don't understand why the recall was even done on the V6s...? Doesn't make a whole lot of sense.
Anyways, carry on.
The reasons the recall was done on the V6 alot apply to the 4cyl too. The PCV hose was moved to prevent the air filter from being soaked in oil, The big heat shield that goes between the manifold and the block is there in case the block decides to let a piston go through it and make a hole and dump coolant and oil on the CAT, catch fire. The heatsheild over the manifold is to prevent heat on the wiring harness, which the loom can become brittle and break off, fall on the CAT and catch fire. The decklid weatherstrip was removed because it can become brittle, break off, fall on the CAT, catch fire.
As you can see this is where GM was going with this. The CAT is a huge plate to light things up too I have seen some of the decklid strips do just that get real brittle and break off, the CAT is straight below.
I appreciate you putting the pics and info together. When I bought my 85 it had all of them done on it so I never got a chance to see what was changed. I have always wondered what was done for the recalls.
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01:55 AM
herb_mcracer Member
Posts: 30 From: McMinnville, Oregon. Registered: Nov 2008
When I took the intake hose off to clean up my TB, the pipe that leads to the back of the valve cover feels a bit wobbly. Did I knock something loose or is this normal?
I don't think my car ever got the recall done. I have added the CRX intake and here is how I have it. Let me know if there is anything wrong. I hooke up the 2 hoses on the firewall and the sensor too.
Originally posted by fierosound: The idea was that it would allow more hot air out of the engine bay, but removing it allowed water to fall through past the window onto the engine and exhaust manifold - and the thermal shock caused the exhaust manifold to crack in many cases.
I still don't understand the water part, allow me to explain:
When the car is moving, water shouldn't get to this point - maybe when standing still and in a heavy rain. When you open the decklid the rubber pulls away from the window and water still runs down onto the manifold.
As for the manifold cracking, IMHO, I personally feel that this is due to the short exhaust system and it being spring mounted. There some weight here and it does bounce when the car is in motion and this movement is then transfer up to the manifolds and attacks the weak point. I 'think' that installing one of those flex tubes between the y-pipe and where the cat noramlly is would help solve this issue if this is indeed the case. All cars today have this flexable tube installed.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
