Quote:
Originally Posted by Mike C
Agree with the above. I have a 71 GMC with a 402 in it I got cheap and it had bad lifter noise. I put quart of MM oil in it and quieted down a bunch. Need to do T-stat now as it seems stuck open and won't get hot. Looking to get some real temp in the oil before I change it.
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I put the MMO in it and ran it for about 15 minutes tonight Wasn't clacking at the time but I believe the idle smoothed out. It idled okay before but seems smoother now. Could be my imagination.
My temp gauge or sending unit is screwy. According to the gauge in the dash it was running cold when I got it so I replaced the T-stat with a 180 but it didn't help. The gauge still only gets to the first mark.
I'm going to drain the 15W40 soon and put another bottle of MMO in it and run that for a while. Maybe the HDEO got some trash moving that wound up in a lifter.