| Hey guys I started my 2nd rebuild after some questionable machine shop services. The first failure was due to what appeared to be coolant in cylinder #5 and #3 and I suspected the machine shop work (or should I say lack of) which was later verified by the new machine shop. Finally got her back together....
{sorry cant get the pics linked, will try later} and after the initial break in of the engine, tps, and timing adjusted I changed the oil. When I started draining the oil it looked very strange but I thought (wishing) it was my zinc additive that changed the color. {sorry cant get the pics linked, will try later} After the oil was drained I left the oil pan plug out and started a pressure test on the cooling system t see if there was coolant seepage into the lubrication system. Within minutes I had the coolant flowing out of my oil pan and the pressure tester gauge had dropped from 18 psi --> 0 psi. At this moment I don’t think it is the machine shop services as I went to another shop that was high recommended and had very good recommendations from around the area. I assembled the engine the first time without any issues for over 6000 miles. This time due to my busy schedule I let the machine shop assemble the short block and I took it from there. The head was milled (not exactly sure how much) and new head bolts were used. When I asked the machine shop about thicker head gaskets he stated he didn't think they were required. For a point of reference these guys build 1000 hp V8 for tractor pulls and drag racing and the owner has personally built a couple of our VG30s. When I get off work today I guess I will do a leak down test to see if I can isolate this issue to a particular cylinder. Anyone else have some recommendations or test procedures for items to inspect/test? Any thoughts or comments would be greatly appreciated. Cheers,
Sammy
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