Quote:
Originally Posted by arpad_m
I think 20 psi is only a precursor when the pump is only cracked but not yet completely broken, so if you stop driving the car and get a new pump installed, there would be zero damage.
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Thank you. Makes sense. When I had my 920 mile oil change I noticed a fine metallic presence in the oil. Sent it off to Blackstone. That was 100 miles ago. I didn't notice any in this change, But it scared me that the pump was going. I never noticed a change in pressure Idles ate 29-32 PSI when warm. Cold it's in the upper 30's to low 50's. I have been keeping an eye on the pressure.
Here's what Blackstone said:
We noticed some very fine metallic glitter/debris in the sample bottle this time, so that'ssomething to pay attention to. The microscopic wear metals look good -- that's the scale on which ourspectrometer reads metals, so visible metal usually goes undetected in testing. In any case, the visiblemetal may not necessarily signal an issue for your V-8, especially if it runs well. Maybe it's due to lingering
products of break-in since the engine's still got very low miles on it. No immediate issues stand out in thecurrent data or emerging trend. Just check back in ~100 miles.
After 100 miles as they suggested:
We've got nothing but good things to say about these results. It's not clear if it's 10 hours or miles that were put on this oil, but either way, metals are reading just about as low as could be, so there isn't any sign of poor wear or more serious mechanical trouble. For reference, the universal averages show typical metals for an LT-4 that's put about 2,800 miles on the oil. No fuel or coolant contamination was detected, and the viscosity is in spec for 0W/40. Insolubles measured at only a "trace" level, which is acredit to effective oil filtration. Nice report!