ScrubyMcBubble
Probationary Member
- 20
- 7
- Apr 25, 2013
-
Winnipeg,
MB, Canada
I'll start with the question: The leak is small and isolated to Cyl 1, since it is at the end of the motor is it worth trying to tighten the head on that side of the motor? Ive never opened up my motor so im unfamiliar with how accessible the head bolts are or if i might as well do the gasket and have the head reconditioned or flattened.
It all started with a bad waterpump which caused the engine to overheat a few times before diagnosed and replaced.
I was fairly certain i had a gasket leak when my reservoir kept overflowing on me with multiple new caps but i wanted to prove with certainty. After inconclusive tests with Block tester fluid and compression tests i finally found the leak with a leakdown test (named for good reason!). My compression was solid within 158 -160 psi across all 4 cyl. Not convinced i tried the block tester fluid 3 times on the car but it always came back inconclusive steering me further away on the gasket theory. Finally on my leakdown test which also performed very well at 4-6% leakage i was able to get my rad fluid to move/bubble on cylinder 1 at 50psi with only ~7% leakage.
Short video attached
Im guessing with such a small difference in pressure on the leakdown test that the leak is small/slow which is why my coolant seems fine until the cars been running for over 20 minutes. Also likely why i never detected the gases in the coolant on my 3-5min block fluid tests as the bubbles hadn't risen to the surface yet and the slowly rising coolant gave off the appearance of coolant expansion from heat.
It all started with a bad waterpump which caused the engine to overheat a few times before diagnosed and replaced.
I was fairly certain i had a gasket leak when my reservoir kept overflowing on me with multiple new caps but i wanted to prove with certainty. After inconclusive tests with Block tester fluid and compression tests i finally found the leak with a leakdown test (named for good reason!). My compression was solid within 158 -160 psi across all 4 cyl. Not convinced i tried the block tester fluid 3 times on the car but it always came back inconclusive steering me further away on the gasket theory. Finally on my leakdown test which also performed very well at 4-6% leakage i was able to get my rad fluid to move/bubble on cylinder 1 at 50psi with only ~7% leakage.
Short video attached
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Im guessing with such a small difference in pressure on the leakdown test that the leak is small/slow which is why my coolant seems fine until the cars been running for over 20 minutes. Also likely why i never detected the gases in the coolant on my 3-5min block fluid tests as the bubbles hadn't risen to the surface yet and the slowly rising coolant gave off the appearance of coolant expansion from heat.
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