Question about 1995 Chevrolet C2500

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Exhaust leak the donut in my exhaust manifold to pipe is leaking and the 3 bolts are there usually rusted away so will have to take the manifold off to drill them out. does chevy ex manifold bolts go into the waterjackets in the head 1995 c2500 350cc

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They don't go into the water jacket, but be careful not to drill any deeper than the bottom of the bolt hole or you can go through to the water jacket, a piece of rubber vacuum hose over the drill works well to limit the drill depth.

Posted on Feb 19, 2009

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1994 ford ranger has chirping noise coming from behind motor I replaced distributor cap and rotor still happens and i can't figure out what it is does any one know?


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.

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HOW TO REPLACE UPPER AND LOWER GASKET


This is going to be a pain, due to the age and rust. I assume when you say upper exhaust gasket. You are referring to the manifold to head gasket. If so you need to soak the stud/nuts with PB Blaster lube then back out the nuts, to remove the manifold. For the lower gaskets I assume you are referring to the donut gaskets where the pipes meet, I am pretty sure this model does not use donut gaskets.

Feb 14, 2014 | 2000 Ford Taurus

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How do i change a donut on the exhaust


An exhaust donut is basically a lead ring that mates the exhaust headers/ manifold to the rest of the exhaust. to remove it you must separate the two exhaust flanges on the mainifold and exhaust pipe. These are usually held on by a bolt and a nut going through both. after they separate the lead donut wil be between the two. Sometimes due to rust and extreme temperatures exhaust is rather difficult to get apart and may result in broken bolts. Use plenty of PB Blaster (penetrating lube) to help separate these two flanges. Good luck!!


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Apr 15, 2011 | Cadillac DeVille Cars & Trucks

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How to put an exhaust donut gasket in


Remove the body harness for the exhaust closet to the dounut. this should give you enoun slack to move the pipe. Assuming your clamp bolts will loosen. Loosen bolts on the doughnuts clamp. remove the clamp. Then pry the tail pipe away from the manifold and remove the old dougnut gasket. Spray it down with WD-40 and wire brush it clean. Insert new dougnut gasket and tighten new clamps down around it.

If the bolts on the clamps are rusted to bladly to loosen then cut off with a reciprcating saw or a hi speed cutting disc. Just becareful not to cut into the exhaust pipe or yourself.

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Exaught manafold leak


You state that car makes a loud noise when driving. Do you notice the sound more when you accelerate? If yes, then it could be either the exhaust manifold gasket or the donut gasket. The donut gasket is where the exhaust pipe connects to the exhaust manifold.

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WHERE TO LOOK FOR EXHAUST LEAK


There are several areas to check for possible exhaust leaks. i will list them below.

1. Exhaust manifold gaskets - This will be the most common area. There is a gasket that separates the block from the exhaust manifold. these gaskets can fail, thus, causing a exhaust leak at the manifold.

2. Lower manifold gasket(donut gasket) - This will be a possible leak spot as well. This small circular gasket is placed in between the upper exhaust pie and the lower side of the manifold. It basically separates the pipe from the exhaust manifold.

3. Exhaust pipe - The entire pipe can rust overtime, thus, creating small holes along the pipe structure. These holes will cause the exhaust to leak ,thus, filling the vehicle will moderate fumes and causing louder than normal engine sounds during revving.

4. Muffler - This component can also deteriorate to the point that it cannot filter out the noise. It will also cause leaks as well.

You will find the leak in one or all of the areas stated above in the list.

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2 Answers

What repair is needed to stop exhaust manifold leak and what do i need to do the at home repair


It depends on the leak. First of all - see if you can see any cracks on the manifold - telltale signs would be a visible crack and black residue around it from exhaust. If you see that the manifold should be replaced. - welding would be a possible alternative. If there are no cracks - check all the nuts and studs to make sure they are tight. Make sure the exhaust pipe is tight and not leaking at the connection. If everything looks tight and secure - change the exhaust manifold gasket. All of that could be done at home depending on your comfort leel with the tools and time available.

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Loud exhust


Hi,welcome to fix ya.
usually the ones in the exhaust manifolds where the pipe attaches go bad . there is a metal sleeve that goes inside the donut be sure to use these or the donuts will burn out pretty fast. use a generous amount of penetrating oil on the bolts first they get pretty rusted on these .

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