Leak down test results
04-24-2010, 04:25 PM
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Leak down test results These are the results of the leak down test I performed on my engine.
Rear
19% 25%
17% 27%
24% 15%
22% 25%
Front
There seems to be quite a variance in readings from the cylinders. 15% to 27% being the biggest at a 12% difference. The test was performed on a cold engine since the engine is out of the car. I'm sure that will make a difference, but I don't have a choice.
My heads are coming off to install 243 castings in their place, and my oil pan is coming off to install Improved racing's oil pan baffle as well as KaTech connecting rod bolts. The engine is sitting on a stand.
My question is, is it okay to change the piston rings, without a hone and crosshatch? This is the perfect time to change the rings since the motor will be apart, but taking the bottom end to a machine shop will be difficult for me. I'm assuming the rings wear quite a bit faster than the cylinder walls, so I'm hoping to get good results from just changing the rings, but will they seal alright with the cylinder walls as they are?
Rear
19% 25%
17% 27%
24% 15%
22% 25%
Front
There seems to be quite a variance in readings from the cylinders. 15% to 27% being the biggest at a 12% difference. The test was performed on a cold engine since the engine is out of the car. I'm sure that will make a difference, but I don't have a choice.
My heads are coming off to install 243 castings in their place, and my oil pan is coming off to install Improved racing's oil pan baffle as well as KaTech connecting rod bolts. The engine is sitting on a stand.
My question is, is it okay to change the piston rings, without a hone and crosshatch? This is the perfect time to change the rings since the motor will be apart, but taking the bottom end to a machine shop will be difficult for me. I'm assuming the rings wear quite a bit faster than the cylinder walls, so I'm hoping to get good results from just changing the rings, but will they seal alright with the cylinder walls as they are?
