3 935 kr
Standard dimension with 3.18mm oil ring width, this piston ring kit fits Cadillac original standard dimension pistons
A complete piston ring set in original design for 1 engine
Please note that this piston ring kit only fits Cadillac original standard dimension pistons with 3.18mm oil ring groove width.
So if you have the standard diameter of the pistons and the width of the oil ring is 3.18mm, then this is the right piston ring kit.
Before installing the piston rings on the piston, slide the piston rings into the cylinder bore one at a time using a plunger so that they come straight. Check that the end gap is the same on all rings. If you want to measure the end gap use a blade gauge, the Cadillac workshop manuals say there should be an end gap of at least 0.33mm. The max end gap according to Cadillac is 0.73mm, if the gap is bigger it means you get a little worse compression, if the gap is less than 0.33mm then something is wrong.
In order to get a good contact surface between the cylinder bores and the piston rings, these must be worn against each other.
The cylinder wall must be cross-honed (slightly roughened surface) when fitting new piston rings. The tops of this surface are cut down by the piston rings during run-in. In order to get a good seal between the ring and the cylinder wall, you have to create a proper cylinder pressure so that the entire circumference of the piston ring is forced out against the cylinder wall.
When you have refurbished the engine, do not let it idle. Let the engine run at a slightly higher speed for the first half hour and you will get better speed of the oil pump and water pump, thus better lubrication and cooling. Load it a little at regular intervals and you will get a higher pressure behind the piston rings and break-in will be easier.
Here you get the measurements of the most common cylinder dimensions. Scrape off the soot and then measure at the top of the cylinder in the engine block, don't measure on the piston as it could be wrong. It is fine to measure with an ordinary caliper if you are accurate
STD 4.13” = 104.90mm
+020” 105.41mm
+030” 105.66mm
+040” 105.92mm
