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How do you a cylinder compression test for a Chevy 350?

Anonymous

∙ 8y ago

Updated: 10/21/2022

get a gauge tester with correct adapter for spark plug hole, let engine run to operating temp (promotes sealing and for accurate read), pull fuse to disable fuel pump, pull all plugs (so turns over easier) now thread the tester into the holes one at a time, order not important as long as you note reading for each, crank engine for a few seconds (easier with a helper) the needle on the guage will stop moving at max comp and remain there until you push the button releasing pressure, note highest reading ea. cylinder, all should be within 10-15 percent of each other. If any below 125 or so, rebuild time will be coming soon, any below about 100-110 are already close to misfire territory since a certain amount of pressure is required to make mixture explosive. Have fun

Wiki User

∙ 8y ago

What else can I help you with?

I suspect a blown head gasket on my 1989 Chevy 1500 with the 350 motor but how can i be sure and which side its on?

You will need to do either a cylinder leak down test or a compression test.

What if Chevy 350 cylinder compression is 115 psi to 135 psi?

then youre running about 8.5:1 compression

What is the individual cylinder compression for a 350 Chevy engine?

around 80 ft.llbs. or higher is usually good.

Why would a Chevy 350 have low compression on every cylinder after rebuild?

head gaskets??? warped heads? did you have them milled?

HOW do you detect air leak small block 350?

A compression test will determine which cylinder(s) are at fault.

What should the cylinder compression be for a Chevy 350?

My truck runs about 140 psi, but was rebilt recently. 120psi is normal for a truck with normal wear.

What is Compression specs for 1974 nova 350?

Compression ratio on a 1974 Chevy 350 in a Nova was 8.5:1.

350 Chevy compression?

The compression ratio of a 350 Chevy engine usually ranges from 8.0 and 9.0 to 1. This provides a good balance of fuel economy and power.

What is the cylinder compression on a 5.7L vortec?

The ratio is 9.5.1 in the 350 vortec. Doing a compression test you should not have any below 100 psi and all should be similar to each other.

What is the compression ratio of a 1974 Chevy 350?

8.5 to 1 compression is factory stock.

What is the cylinder order on a Chevy 350?

the firing order for a small block Chevy 350 is 18436572

What is the compression for a stock 1972 Chevy 350?

About 8.5 to 1

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