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Results back from Blackstone not so good

4556 Views 34 Replies 7 Participants Last post by  vlamica
Hello Ford truck fans,

Just got the results of my oil sample back from Blackstone labs. The results show high iron and coolant in the oil. I have added the pdf file as an attachment so you can see what it looks like. Chuckster57 has been very helpful throughout my rebuild and hinted that theses engines have an oil cooler mounted on top of the engine. Possible that some failed o-rings area allowing coolant to find its way into the engine oil? The engine doesnt seem to use oil and I havent noticed that the coolant level dropped in the last 2500 miles. I have only had the truck for 2500 miles and when i drained the oil from the original purchase it was cold in the pan and had not started in a couple of months. I wonder if the new oil had some residual from the first poor drain. Has anyone had experience with these o-rings? Its a 94 IDI Turbo.

Thanks Vinnie


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Blackstone told me that the iron was high in a sample, I went back and found even higher iron readings years ago that Blackstone didn't comment upon so I assume that:
The iron reading of years ago didn't affect engine longevity and whoever is writing the comments on the analysis sheet is unduly cautious with the iron readings in the 7.3 IDI
12 for iron seems very low. My readings have been much higher for years and the engine is still one that I would trust for any trip. If I think of it I'll post my Iron results that I've saved over the years - the sheets are 60 miles away but I'll try to remember to post them when I'm back there.
It's a great engine, I'm glad that the coolant issue wasn't serious.
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