Re: oil filter plumbing

Posted by prentice672 On 2017/10/10 23:28:21

Early on I suspected low oil pressure since the car gauge always showed a tad below 40 psi. So I replaced the sender with a mechanical pressure gauge and drove it at about 45 mph in 3rd gear ( out of overdrive) and the pressure was pretty close to 50 psi as advertised for the 356, so I don't think it's an overall oil pressure issue. This is something I just noticed the past month or so. I'm not 100% sure it's lifter/valve noise, I thought it might be exhaust or ignition (pinging or knock) but I replaced the vacuum advance and checked the most obvious exhaust connections and don't see any signs of leakage. It really sounds like it's coming from the front of the engine and I removed the forward valve cover and turned the engine over several revs by hand (by grabbing the fan) and watched the lifters move and tried to get a feeler gauge between the lifter and the valve stem and couldn't. they all seemed pretty tight. I then sprayed some KROIL into each of the front 8 lifters. In addition I've added a quart of Marvel to the oil. Nothing I've done seems to help. I drive the car almost daily and during the first drive of the day I can really hear the clatter accelerating in second and third. Then, as I drive for 15 or 20 minutes I have a harder time hearing it. Now understandably it's harder to hear the noise in traffic, but I've driven around town, and then returned to my neighborhood street where it's relatively quiet and I can barely hear the sound. Needless to say, it's driving me nuts.