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Where does maximum cylinder bore wear normally occur and why?
most cylinder wear occurs at the top fo the ring travel. Pressure on the top ring is at a peak and lubrication at a minimum when the piston is at the top of its stroke
What causes cylinder taper?
Taper is the wear of the cylinder bore that causes that bore to be cone shaped or "tapered"This caused by several factors including:Fuel washing oil off the cylinder wallsThe side forces created by the operation of the piston against the crank through the connecting rodAnd many other factors
How do you determine how much to over bore engine?
You determine how much to bore an engine by how much wear is on cylinder walls if wear exceeds .003 thousands over factory specs then it must be bore to the next .010 thousands over cylinders are only bored in .010 thousands increments and every measure is using factory specs as reference point
What is the maximum cylinder wear on a Chevrolet 350 engine?
If you have to ream the ridge to get the old pistons out, you probably need to bore the cylinders and install oversize pistons. This assumes it was taken apart in the first place because of low cylinder pressure or excessive oil consumption (ie: worn rings). If there's not enough ridge to prevent you from pushing the pistons out of the bores, you can probably hone it out and re-ring the old pistons. If there is a ridge at the top of the cylinder, you need to bore it. The general consensus is that a rebuilt engine will wear out rapidly if there is any amount of taper. If you can catch a fingernail on the ridge, it's too much The upside is, if you bore it, put in new pistons and polish or turn the crank and replace the oil pump, you effectively have a new lower end and it should last 200,000 miles if properly maintained.
Is the cylinder sleeve nikasil coated on a 1995 yz 250?
The YZ250 cylinder is nikasil coated in the original bore. But, note that the cylinder is all aluminum and does not have a cylinder sleeve as an original part. The original aluminum bore is part of the cast cylinder and is then plated with the nikasil plating. If the cylinder should be damaged by wear or piston seizure, it can be repaired by boring and installing an iron cylinder sleeve. The cylinder sleeve will have the two-stroke ports already machined into the sleeve. Once re-sleeved the cylinder now can be bored to standard size and then to many overize pistons available on the aftermarket. This is a popular method for repairing nikasil plated cylinders economically. A good source for tech info or service is www.lasleeve.com
Can you put a use piston in?
no no no no no, and once again to solidify my point, no! as the engine is used your pistons, and cylinder walls wear in a certain pattern, and they have a different level of wear from car to car, what you have to do generally is send the motor to a machinist to bore the cylinders out slightly, then get new oversized pistons
What is the difference between Briggs intek and Briggs diamond I C?
Intek Pro, Vanguard, and I/C engines are for heavier duty Industrial/Commercial applications. The cylinder has a cast-iron sleeve insert. Standard Intek and Powerbuilt have an aluminum cylinder wall. These are for general and consumer use. Diamond refers to a Diamond Bore cylinder, a special preparation of the cylinder for better wear and oil consumption.
Can you use slugs in a double barrel shot gun?
You can shoot slugs in a double. Slugs are best shot through a cylinder bore or improved cylinder choke. The tighter the choke, the more they will be disrupted. There is risk of excessive wear and damage through a tight choke--tighter than Modified Choke.
What step must you perform before removing the piston from the bore to prevent damage?
Depending on the amount of wear in the cylinder, there may be a ridge at the top of it. If there is much of a ridge, the rings in the piston will catch on this and possible damage the piston. The ridge can be removed with a ridge reamer.
Does 15w40 have zinc for old engines?
Depends on the brand, if so and how much(they hardly give the additives used). Zinc is an "anti wear agent" especially it's extreme pressure qualities which aid in reducing piston ring-to-cylinder bore wear at BDC and TDC. It also protections from oxidation/corrosion. Almost all diesels oils have it in them.
What is the cause of Cylinder Taper?
Wear from high mileage.
Why do spacemen wear helmets?
spacemen wear helmets because , there is no oxygen in space. They have to carry an oxygen cylinder on their backs.
