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Youre taking a big chance there Im sorry to say. Aside from the fact that you can skip timing and all that stuff when the tensioners fail, the motor really should come apart and needs to be flushed. That grinding noise you heard, that sounds like someone using an old muffled chain winch insie your motor is actually just that, the chains dragging along the ramps and case casting. Its grinding it up, its ground it up. Do yourself a favor, pull off your oil filter, cut off the outer metal shell, pull the filter element out, carefully put off the end caps that hold the folds together, and spread out the filter element like your reading the dead sea scrolls and look at how much filings are in the filter. Thats whats passing through your motor now, its going through the pump, through the mains, through the spray bars, etc. You really cannot rely on the filter to catch it all, they bypass half the time, so the filter doesnt do as much as you think. The only way to really be safe, is to pull the motor apart, inspect and replace the bearings, pull all of the case plugs and clean the **** out of everything. I had the same thing happen to mine and I actually had a pressure fed tensioner fail on me. Even those can go bad, the little check valve in them can go and they collapse just liek the old hydraulic ones do. It can be a mess. Ive seen it a handful of times back when I was working on porsches. Didt mean to ruin your day. But check the filter at least so you can see if there is debris in there. Chances are there is, esp if you have been hearing that noise
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