When should a semi engine be rebuilt? Best practice says that trucks with more than 700,000 miles, should have an engine overhaul performed. If your truck is nearing that mileage marker (or possibly even double that) and has never been taken apart, it's time to consider an overhaul. How much is a new semi engine? Class 8 engine overhaul prices can vary greatly depending on factors such as engine make, overhaul level, and the shop that will perform the engine work. Typically, certified engine overhauls range anywhere from $20,000 to $40,000. How long does a semi truck engine last? Engines...

Where can I get a Porsche 944 valve replaced? Heater control valve replacement (944time.com) Removal (clarks-garage.com) Information and replacement (clarks-garage.com) Idle control motor (idle stabilizer) replacement (clarks-garage.com) Ignition switch replacement (clarks-garage.com) Where can I find a Porsche 944 flow diagram? Flow diagram and description – Turbocharged 944 (clarks-garage.com) Cooling system draining, filling, and venting (clarks-garage.com) Fan operation and troubleshooting (clarks-garage.com) Troubleshooting cooling system problems (clarks-garage.com) Front oil seal replacement (clarks-garage.com) How to repair rear hatch of Porsche 944? Rear hatch strut replacement (clarks-garage.com) Cylinder head and head gasket installation (clarks-garage.com) Cylinder head and head gasket removal (clarks-garage.com) Cylinder head tightening...

Why does my engine make noise when I Turn on the engine? Hydraulic lifters allow the valve lift to increase with engine rpm by filling up with oil as the oil pressure rises. The oil inside pushes the rocker arms further away from the camshaft, which causes the valves to open further. Oil pressure failures are usually at the root of lifter tapping, also known as lifter collapse. Check the oil level. What does the 4.3 Vortec engine noise mean? 4.3 vortec engine , engine noise, knocking or tapping on top of engine, not when cold , but starts noise...

What is a pinion leak? The pinion seal, also called a pinion shaft, is designed to keep oil in and any water, dirt or debris out. A failed pinion seal can result in a minor leak where fluid seeps out, or a major leak that can ruin the differential bearings and gears. When to know if you have a pinion seal leak? If you notice fresh oil, you have a pinion seal leak. As soon as you notice this, contact the professionals at YourMechanic to have the pinion seal replaced. 2. Differential has low fluid If you notice your differential...

Can the O2 sensor cause a car to smoke? Can the O2 Sensor Cause Smoke? When operating properly, the O2 sensor cannot cause your engine to smoke. If the sensor is defective, however, it can cause your car to run either rich or lean. If your car is running excessively rich, you may notice black smoke coming from your tailpipe. When operating properly, the O2 sensor cannot cause your engine to smoke. If the sensor is defective, however, it can cause your car to run either rich or lean. If your car is running excessively rich, you may notice black...