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351w oil leak when engine cold 351w oil leak when engine cold
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Old 06-22-2013, 02:17 PM
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Location: Keller, TX
Cobra Make, Engine: Lonestar Classics LS427. Self-built 408W, AFR 195 heads, Performer RPM Intake, Quick Fuel 750, 407rwhp, 479rwtq
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Default 351w oil leak when engine cold
1000 miles on a recently rebuilt 351w. I've noticed that when the car sits, it drips oil. Not much - maybe an ounce. It appears to be coming from the front of the engine, but I cannot tell where exactly. It does not leak when the engine is running or when warm - only after it has cooled off.

I recently changed the oil after the car sat for a few weeks. Drained the old oil, then put in Royal Purple. I noticed a small oil puddle on the floor after filling the oil. This was before the motor was run with the new oil. Looked around the engine but couldn't find a source.

Yesterday I put the oil dye in the system and drove it around for 10 minutes. Didn't see any oil (or dye under the UV light) after the drive. I will look again tonight to see if anything has dripped and see if I can find a trail with the dye.

Any thoughts?
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