Repair And Fix it

Crankshaft pulley bolts are among the toughest bolts to break loose on vehicles, simply because they are constantly rotating, subjected to high heat and require a high torque value to stay tight. In order to prevent the pulley from turning while loosening the bolt, youll need a crankshaft pulley holding tool. This tool bolts to the inside of the crankshaft pulley using the holes cast into the steel pulley spokes. You can rent or purchase this tool from most auto parts stores.

Instructions

1

Alight the holes in the crankshaft pulley holding tool with the screw holes on the inside of the crank pulley.

2

Install the bolts that came with the crankshaft pulley holding tool with a ratchet and metric socket. Snug the bolts tight so the tool is firmly secured to the pulley.

3

Place a metric deep-well socket on a T-handle breaker bar, then slide a small diameter steel pipe over the breaker bar; the pipe will give you the increased leverage you need to break the crank pulley bolt loose.

4

Grab the crankshaft pulley holding tool in one hand, then grab the breaker bar and pipe in the other. Hold the pulley still with one hand while you break the bolt loose with the other. If the bolt is extremely tight, you may need an assistant to hold the pulley still while you focus on breaking the bolt loose.

An exhaust valve allows cylinder head gasses to escape, Expensive engine work is often necessary when an exhaust valve breaks. Though repair is needed once this occurs, having information on what caused the valve breakage might be important.

Types

There are two types of breakage to which exhaust valves can fall victim. One type involves a breakage where the head and the stem connect. A break can also occur at the point of the stem where the keeper-grooves have been built in.

Head Breakage

Exhaust valves can experience this type of breakage because of stretching that occurs due to constant heat. Thermal shock negatively effects exhaust valves, because sudden drops in the engines temperature causes them to break.

Stem Breakage

Heavy wear in the keeper grooves will cause the stem to snap off an exhaust valve. Constant sideloading can cause stem breakage if the stem height has not been installed correctly.