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North Central Iowa | I'm having same issues with my Bonneville SSEI also. My intake gaskets are leaking external but also I think there is some leaking internal also (Antifreeze) The mix of a hint of antifreeze in the oil make the bleed valves in the lifters not work right, so when you turn off the engine the oil bleeds from a bad lifter that has valve open in the head, giving you a wide clearance between the push rod and the rocker arm(the clatter noise) when you start it up again.
I been putting some conditioner in my oil and been getting by. The last two oil changes I didn't put any in and now I've got lifter clatter again.
I let it Idle and warm up and it eventually gets the lifters pumped back up and it quits.
Try some conditioner, worth a shot, depends how bad they are. Good Luck
Didn't really believe in the stuff but It does make a difference in my situation. I will still need to fix my intake gaskets and at that time I'll put new lifters in. | |
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Hydralic lifter noise GM 4.3 v-6
