You are here:

Toyota Repair/exhaust manifold gasket removal

Advertisement


Question
Hi I have a 1992 Corolla with 120,000 miles. The car has an exhaust leak at the exhaust manifold gasket on both ends. The center 3 nuts/studs can be tightened but both end bolts did not seem to tighten so I am guessing the exhaust gasket needs to be replaced. Both end bolts look rusted & I am concerned they may break when I try to remove them. From your experience, do the end bolts usually come out easily or should I expect them to break off? Is there a good way or ways to prevent the bolts from breaking off? I have sprayed the bolts with penetrating oil, but since the manifold is pretty thick I don't know if the penetrating oil will go past the manifold into the head.
I appreciate any tips / help with this.
Bob

Answer
Hello, the bolts are steel and the head is aluminum, bad combination, rust and corrosion can be an issue, Arent the end bolts actually studs with nuts, the studs would just stay in the head, you can also try to heat them up with a propane torch to loosen them up.

Toyota Repair

All Answers


Answers by Expert:


Ask Experts

Volunteer


Ted Ritter

Expertise

I have more than 28 years experience as toyota technician, I will be able to answer most questions related to the Toyota product line up to the present year models,I am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for more ten years an have answered over 16,000 questions helping Toyota owners with their problems and save thousands of dollars without any compensation, some of my answers are published on many other websites including google and various automotive forums. DONATIONS ARE VERY MUCH APPRECIATED, IF YOU HAVE RECIEVED HELPFUL INFORMATION PLEASE MAKE A DONATION. AS OF TODAY (JULY 22, 2014) ALL REQUESTED GRAPHICS, ILLUSTRATIONS, DIAGRAMS, PHOTOS, WILL REQUIRE THE MINUMUM DONATION UP FRONT.

Experience

Toyota technician since 1979,expert in electrical systems,OBD systems,engine repair, driveability problems,EFI systems,ASE certified,Toyota master technician.
Certified Hybrid Vehicle technician.

Education/Credentials
Toyota master technician, ASE certified in eight catagories, Hybrid vehicle certified. Toyota technical training: Engine Automatic transmission Manual transmission Drivetrain Electrical systems Brakes and chassis Air conditioning Engine performance and diagnostics Hybrid systems

©2016 About.com. All rights reserved.