'85 Short Bed 4X4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**aotte1** · 04-03-2014, 10:21 PM

Looks like you have a great truck, that will be lots of fun.

A couple of answers for you, "leak down test" checks the condition of the combustion chamber process, e.g. the valves, rings, etc. It uses compressed air to check condition, two pressure gauges are used and compressed air is injected into a cylinder through the spark plug hole. Reading the difference between the two gauges tells you the condition. I will try to post a picture of one.

The "CR" and "CL" I assume means right and left sides of the engine bay, and the "C" I though means a C style truck( the is just a guess on my part).

Good luck on your truck.

Les

04-03-2014, 10:21 PM	#11
aotte1 Senior Member Join Date: Oct 2013 Location: lousiville Ky Posts: 2,637	Re: '85 Short Bed 4X4 Looks like you have a great truck, that will be lots of fun. A couple of answers for you, "leak down test" checks the condition of the combustion chamber process, e.g. the valves, rings, etc. It uses compressed air to check condition, two pressure gauges are used and compressed air is injected into a cylinder through the spark plug hole. Reading the difference between the two gauges tells you the condition. I will try to post a picture of one. The "CR" and "CL" I assume means right and left sides of the engine bay, and the "C" I though means a C style truck( the is just a guess on my part). Good luck on your truck. Les



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