My exhaust pipe rusted off - 1992 Chevrolet C/K 2500

Sometimes this is called an Exhaust chirp. This can happen where the main exhaust pipe meets the exhaust manifold. There can be a part called an exhaust donut, which is in between the manifold and the catalytic pipe.

Some models have a smaller pipe coming from the catalytic pipes and approaching the Pollution equipment. Some of these pipes have a flexible joint which rusts and leaks causing a chirping noise.

You can cut out the Y pipe and replace it with a flex pipe from parts store, then clamp each end of the flex pipe, the pipe diameter will be 1-7/8 or 2 inch, also for the pipe replacement piece would work from a sunfire or cavalier from 1995 and up, might need to replace the muffler strap too. as it can break from rusting, if not already rusted and broken.

NEED TO TAKE VECHICLE TO MUFFLER SHOP LET THEM FIX RUST PIPE WITH A NEW PIPE.LET MUFFLER SHOP FIX BECAUSE THEY CAN WELD JOINT SEAL BOTH NEW EXHAUST PIPE AND NEW MUFFLER SO YOU WONT GET CARBON MONOXIDE POISON LET MUFFLER SHOP CHECK ALL THE EXHAUST SYSTEM BECAUSE THE WHOLE SYSTEM COULD BE RUSTED DROP DOWN WHILE DRIVING YOU PROBABLY NEED NEW EXHAUST PIPE HANGERS.

Front Pipe REMOVAL & INSTALLATION Pipe Without Catalytic Converter

1. Before removing any component of the exhaust system, always squirt a liquid rust dissolving agent onto the fasteners for ease of removal..
2. Raise and support the front of the vehicle on jackstands.
3. Remove the exhaust pipe-to-manifold nuts.
4. Support the catalytic converter, then disconnect the pipe from the converter. Remove the pipe.
5. Remove the exhaust gaskets. To install:
   
6. Be sure to use all new gaskets when required. Assemble the system, check the clearance and tighten the bolts to about 15-30 ft. lbs. (20-41 Nm). Fig. 1: Front exhaust pipe connection common on vehicles with the catalytic converter not included
   
   
7. All clamps should be tightened to about 18-25 ft. lbs. (24-34 Nm). Do overtighten the clamps. If pipes become dented they can leak.

Pipe With Catalytic Converter

1. Before removing any component of the exhaust system, always squirt a liquid rust dissolving agent onto the fasteners for ease of removal.
2. Raise and support the vehicle.
3. On some vehicles you will need to remove the brace from the transaxle.
4. Remove the exhaust pipe nuts from the manifold.
5. Support the catalytic converter pipe bolts from the rear of the converter.
6. Lower the catalytic converter/front pipe assembly from the vehicle. To install:
   
7. Be sure to use all new gaskets when required.
8. Attach the new catalytic converter/front pipe assembly to the vehicle. Tighten the pipe to manifold nuts to 20-40 ft. lbs. (27-55 Nm).
9. Attach the bolts at the rear of the catalytic converter/front pipe. Tighten them to 30-35 ft. lbs. (41-47 Nm).
10. Connect the brace at the transaxle if removed.
11. Lower the vehicle.

yes they can be patched but if ther rusted..then the other places are not far behind...best to just get it replaced

yes, go to muffler shop and replace only it! but verify the exhaust pipe for leaks, if have leak in muffler shop repair it too.

Flex pipe will work, or if it's a straight section of pipe you can buy a universal piece of exhaust tubing with flared ends, trim off the rusty ends on your original pipe with a hacksaw or Sawzall and slip in the new section. Clamp it with 2 muffler clamps and you're set. Total cost should be under $40.

I can't see your exhaust system, but I do recommend that you have them show you the "why" of it. Generally the front pipe and the cat last a long time and generally don't need to be replaced very often. If the flanges are rusted and have failed there are "wrap around" replacements that can be used without pipe replacement. Most common is to change everything from the cat back. As I said, have them actually show you what is wrong...or take it to another shop and without telling them the original findings, have them look at it!!! Since there is very little involved except a visual inspection, most shops will not charge or will charge very little for this.

Yes you do. trust me you don't want to get that thing half way out and down and not be able to continue. Soak those rusted exhaust studs in a good penetrating oil over night. I bet they come right out. I would not recomend cutting the pipe.

Those Y pipes are very spendy and rust is definatley a bummer. I live in the desert southwest and see this problem much less as there is little or no rain. Depending where you live it might be worth it to call a yard in vegas or phoenix and purchase one salvage and try to get it ground shipped as cheap as possible. Couple of hundred for the Y pipe and 75 bucks shipping might be a way to go.Set terms and get supplier to guarantee its condition