1996 Collector Edition Corvette

Update your progress on your various car projects.

Moderators: Basement Paul, MostMint, Fred32v, ttamrettus, wxo

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wxo
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Location: Raleigh, NC

Re: 1996 Collector Edition Corvette

Post by wxo »

In the past, I have cut the tubing at the fitting on the exhaust header and used a socket to remove the fitting. Then I just screwed a plug in place of the fitting to close the hole. I've tried to remove the fitting on this engine and it wouldn't budge. It's rusted in and I can't get a wrench on it that will move it.
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wxo
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Re: 1996 Collector Edition Corvette

Post by wxo »

I just realized that what I've been calling EGR plumbing is really Air Injection Reactor plumbing. This car does not have EGR.
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GMJohnny
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Re: EGR or no EGR?

Post by GMJohnny »

wxo wrote:I'm on the fence about the EGR plumbing that is always in my way when I'm trying to fix something on this car. I'm tempted to rip it out, but I don't want to regret it later when I decide to sell it. Comments/votes?

It depends on on how hard it is to take out and re-install. If it’s a huge job leave it, if it can be
reinstalled easily, take it off. If you hate it and its function is nothing,I would take it out and
save it if that’s a possibility. I always like a clean look, removal gives you that.

GM
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wxo
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Re: 1996 Collector Edition Corvette

Post by wxo »

I'm going to think about removing this plumbing while I work on getting the intake back on and the engine running again. Thanks for your comments and advice. One thing at a time. I have to refocus.
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wxo
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Re: 1996 Collector Edition Corvette

Post by wxo »

Minor update: I'm ready to move in a positive direction once again. Intake is clean, gasket surfaces of the heads are clean, and bolts are clean.
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wxo
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Re: 1996 Collector Edition Corvette

Post by wxo »

Maverick stopped over today and we were looking over the current status of the LT4 project. I pulled out the new intake manifold gaskets I had bought and lined them up on the heads see how everything looked. The gaskets lined up and sat nicely in place on the heads, but I noticed that each port opening is not tall enough and intrudes on the airflow at the top of the intake port and would not have provided the proper seal in that area. It turns out that the FelPro gaskets I bought were listed to include LT4 engines, but they obviously did not fit correctly. I searched and found that GM has a special intake gasket for the LT4 (Part #12367777) along with Edelbrock (#7244). I have a set of the Edelbrock 7244's coming from Summit. I believe I have just dodged another bullet. No telling what kind of symptoms I would have to tackle with leaking intake gaskets.
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wxo
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Moving forward again

Post by wxo »

From my last update, the Fel-Pro intake gaskets didn't fit, so I ordered some Edelbrock 7244's for the LT4. They were better, but still not good enough to use. Finally, I ordered some GM 12367777's and they fit perfectly. They were of very high quality gasket material with locating pins that placed the gasket precisely on the head and held it there. Now, finally, I am ready to move in a positive direction again on this project. This morning, I spun the engine with the starter to circulate the oil and mix it with any residual gasoline in the engine internals. Then I changed to fresh oil.
Finally, I installed and torqued the intake.
IMG_3929.JPG
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wxo
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Re: 1996 Collector Edition Corvette

Post by wxo »

Another issue has popped onto my todo list. Maverick reminded me about this old recall https://www.corvetteactioncenter.com/te ... d-516.html that applies to my Vette. It's a very serious issue where the LT4 roller rockers can come apart and cause engine mayhem.

I have looked into ways of verifying if the work has been done, but a local dealer told me that I would have to find the dealer that sold the car originally and maybe they could help me. That's an old trail to follow and it will be much easier just to pull a rocker cover and check the P/N on the rockers. I did some research on the availability of a set of the GM rockers with the correct GM P/N, but, they too, are not to be found. I don't want to get too far out in front of this, so I'll just wait to see what is under the valve covers on my next garage workday...after the snow melts...when it warms up a bit more.
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