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International Automotive Technicians Network
Re: 79 Chev. 454
Posted to Technical Discussion Forum on 7/21/1999

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UPDATE: We did a running compression test and leak downtest the results are: 1. Idle 85 snap 125 26% 3. 85 125 26% 5. 82 125 15% 7. 75 115 30%

The test seems to point toward a cracked manifold yet t... Login to read more.