Tips for Removing the Exhaust Manifold on an Old Engine

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Our expert custom-car mechanic offers tips for removing the exhaust manifold safely when replacing a car engine in this free auto-repair video.

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Video Transcript

Hi I'm Doug. I work with twenty great guys in St. Louis at Doug Jenkins Custom Hot Rods, and we're going to do some work for you today on Expert Village. One important part of pulling an engine out of a car is getting the exhaust free. It's always tough, it's not your fault. If you're doing this yourself, you're going to break things, you're going swear, you're going to burn things. The old exhaust was attached at this point, and you can see the old studs are rusty. On the other side we ended up having to break one off. On this side they came off. Breaking exhaust studs off is a nightmare. If we were to be reusing this engine we'd have to take the exhaust manifolds off, drill and tap new studs into it, it's a real headache. See here, this exhaust stud was maintained, but this one broke off inside the housing. If we were to be using this engine we'd have to remove the exhaust manifold, drill and tap, clean out that hole, and put new exhaust studs in. The old exhaust studs aren't as strong as originally, you can see the threads are smaller than they should be, because rust has taken them away. They're real sharp and real thin. It's not as strong, but removing them and replacing them is so difficult and costly that most of the time we use them if they don't break off when removing an engine.

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