What is the purpose of the crankshaft journal fillets?
A fillet is a radius created in the transition from the rod or main journal to the vertical portion of the crankshaft. The radius improves crankshaft strength but requires a slightly narrower bearing compared to stock production bearings. One small point that is often overlooked is connecting rod bearing width.
What is main journal in crankshaft?
A journal is the part of a shaft that rotates inside a bearing. As can be seen above, there are two types of journal on a crankshaft – the main bearing journals form the axis of rotation for the crankshaft, and the connecting rod journals are secured to the ends of the connecting rods, which run up to the pistons.
Do crankshaft journals wear?
An outside micrometer is used to check for crankshaft journal wear. Journals wear at the ends or in the middle. Check for roundness at two or more different points; they usually wear the most at (TDC) top dead center. Make sure the oil passage holes in the block line up with the oil holes in the bearing.
Can you remove crankshaft without pulling engine?
Although crankshafts are traditionally removed after the engine has been pulled from the engine bay, it is possible to remove the crankshaft without pulling the engine.
Does my crankshaft need grinding?
Upon initial inspection of the crankshaft, with the use of the micrometer, the machinist will determine what bearings need grinding. Indicators that a journal needs grinding include if the surface has wear and make it rough to the touch.
Is a crankshaft expensive?
It is one of the most expensive and tedious problems that you can have fixed in your car. In order to avoid this, try and keep the crankshaft in the best condition possible. If not, you can expect to pay an average of around $2014 for a crankshaft replacement cost total.
What is the difference between crankshaft and camshaft?
A camshaft uses egg-shaped “cams” to open and close engine valves (one cam per valve), while a crankshaft converts “cranks” (the up/down motion of the pistons) to rotational motion.
What are crankshaft journals?
A crankshaft consists of rod and main journals. These journals are the end bearings at the bottom of the connecting rods opposite the pistons. The journals (also called crankpins) are connected to counterweights via plates called the webbing. These counterweights help balance the load of the crankshaft when in motion.
How to replace the crankshaft sensor on a Volvo?
Press the release tab (green arrow) while pulling the connector end (yellow arrow) apart. Pull the crankshaft sensor out of the transmission bell housing. Feed the harness out of the engine with the sensor. This photo shows the sensor removed from the engine.
What does DME do in a Volvo V70?
The digital motor electronics (DME) engine management systems in Volvo V70 vehicles uses the engine control module (ECM) to control fuel injection, ignition and other important drivetrain functions.
How does body control work on a Volvo S70?
On 99+ models throttle body control is carried out electronically rather than with a foot-actuated cable. This gives a smoother, easier to press accelerator pedal, with the downside of increased complexity and a greater than average failure rate.
Why does my Volvo S70 not start up?
Air, fuel, and spark. The three ingredients of a beautiful explosion that make your car go vroom. As sensors age, they can accrue buildup or fail outright due to the wide range of temperatures a car’s engine exposes them to.