Its a chevy 350 5.7 TBI. The oil leak is coming from the rear of the engine right under the rear of the intake manifold but above where the tranny meets the engine. Its for suire not the valve covers or the distributor gasket both of these have been changed and tested. I also know for sure that it is not the oil sending unit. I am not for sure if it is where the intake manifold meets the engine but I am not for sure. The oil seems to be drizzling down the engine block only on the drivers side and follows the tranny until it hits the flywheel where it slings it everywhere. The oil leak only occurs when you get done driving somewhere once it cools off it stops leaking. Here is a picture of about where it is coming from this is not my engine but it is a 350 and will help give a visual. http://i561.photobucket.com/albums/ss57/deving6868/32835479_scaled_224x168-1.jpg
Probably intake, but when replacing gaskets, do not use the end gaskets that come in the kit but rather a thick bead of silicone sealer to ensure a leak free seal
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