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Old 09-12-2011, 02:22 PM
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Oil Leak---for The Life Of Me I Cant Find It :(

Hey everyone, ive got a 1959 chevy apache truck with a 1980 454 engine. Its been leaking around the oil filter area.

I put a new filter on it-no go

I removed the filter and the piece that the filter screws onto and sealed the mounting surfaces with auto grade silicone, then put on a new filter-still no go

Is there something im not seeing or something possibly next to it thats leaking?

Every time I look under there the drip is dripping down off the side of the filter but im almost 100% sure the filter or filter thread piece is not the cause of the leak.

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Old 09-12-2011, 02:26 PM
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Start looking above the filter for oil running down from the top or side.
I don`t know if BBC`s have the oil sending unit beside the HEI as the small block does, but if they do it can run from there down the bellhousing flange off the side of the block on the oil filter.
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Old 09-12-2011, 02:28 PM
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I looked on the driver side of the block and I dont see any leaks on the side of the block, I thought maybe it was the oil pressure line going to my gauge but thats not leaking either. I really dont see any leaks above it.
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Old 09-12-2011, 03:17 PM
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Back of the intake , valve cover gskt. , dist base gskt. , oil pressure gauge/ sending unit ? take a clean towel and wipe locations seperatly [ small section at a time , usually works for me .


dave
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Old 09-12-2011, 05:53 PM
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What the number on the oil filter cartridge that you have on there?
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Old 09-12-2011, 07:00 PM
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There is a pipe plug just above the filter housing on the block that is a secondary oil pressure sender location. It is possible that the plug is seeping past the threads...
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Old 09-12-2011, 07:06 PM
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ill check on that pipe plug.

as for the oil filter part number im using an STP this time.

I dont remember the number but this leak has been a 4 different brand filters and I compared all brand filters in the store and the STP had the thickest rubber seal so im almost positive its not the filter itself.
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