Compression test - need leakdown?
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Joined: Sep 2010
Posts: 3,611
Total Cats: 25
From: Seattle, WA
Compression tested my Miata today.
181, 180, 174, 180 dry.
Is a leakdown test a necessity? Or is the compression on the engine as is healthy enough to proceed with turbo'ing?
Note: The engine was replaced recently by a previous owner. Actual mileage is unknown, however, as the VIN on the engine doesn't match the car's VIN, it's a pretty damned good indicator that an engine was swapped on it. Components involved in the swap have very little wear or tear, I'd estimate at most a year or two since swap.
181, 180, 174, 180 dry.
Is a leakdown test a necessity? Or is the compression on the engine as is healthy enough to proceed with turbo'ing?
Note: The engine was replaced recently by a previous owner. Actual mileage is unknown, however, as the VIN on the engine doesn't match the car's VIN, it's a pretty damned good indicator that an engine was swapped on it. Components involved in the swap have very little wear or tear, I'd estimate at most a year or two since swap.
Joined: Sep 2005
Posts: 34,381
Total Cats: 7,504
From: Chicago. (The less-murder part.)
Are you kidding? Assuming you have confidence in those numbers, that engine is as healthy as could be! I've got > 30 PSI spread on the engine in the blue car, and even it still runs like a champ. (Granted, that would be a Special Olympics champ, but still...)
Joined: Jun 2006
Posts: 29,085
Total Cats: 375
From: Republic of Dallas
I may leak and put the compression tester on my daily today. It needs a rear main, hopefully I'm wasting my time so I have an excuse to put a 10:1, 0-mile motor in it.
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