2004 Volvo XC70 "expand head bolt" Questions

...when the engine is started. The noise disappears when the engine is warm b/c the gaskests have expanded and there is no longer space in between the exhaust manifold and the cylinder head. he

...Head Bolt is typically overtightened at the factory distorting the Cylinder Head and causing Gasket Failure directly around that bolt. I have had to resurface cylinder heads and replaced gaskets on ...

...expand the aluminum and back it out? This bolt is near where the head attaches. Do I run a chance of warping the block? I can get to the bolt with a cutoff wheel, so I can get the transmission off. ...

...to changes in head expansion (the bolt expands more easily with the head) while the engine is running creating a better seal against the block. just follow the directions and all will be

...are require and the use ones if reuse already has no mechanical properties once the head heats and

...out what the problem is? Uses about a quart a week. Longer runs use less after engine heats up and expands. Sound like a head gasket or worse case warped head The head bolts are tty "torque to yield

head to use a wrench on (preferably a strong socket wrench). If you do weld another bolt onto the original bolt, make sure that you let the bolt cool down completely because when you get the bolt hot,

...matching bolt. When this base insert is in the head, it expands when the bolt is turned in. This helps keep the bolt from backing out. I hope my solution is very helpful to you in fixing your

...or block may actually be cracked... and the crack only appears when the engine get hot (the metal expands and allows the pressure to force the leak to happen)...Is this when the leak starts?? If

...bolt, except has a hole drilled through the center and splits cut in the threaded portion creating an "x". there is a small hex head screw set in the hole which expands the threaded portion ...