[Ramblin Fever]

Oh man, ouch, that really doesn't sound good.

Under the VERY very slight possibility a timing belt tensioner can sound like a rod knocking when they go bad. However, it would just be too coincidental to go out at the same exact timing as doing the sea foam.

I did seafoam 1 time, 1/4th can in a full crankcase of already thick 10w-40 oil, only drove 3-5 miles then changed it.

I will NEVER do it, or ANY oil flushing fluid again.

I did not have any bad sounds, bad reactions, etc. but I have read that it can loosen up a LOT of crap too fast and plug your pickup oil screen, along with internal oil passages, which can obviously starve the engine of oil.

Not only that, but if a lot of dirt/crud loosens at once, it can wreak havoc on your bearings big time.

The best thing one can do, if they feel their engine has extra crud built up, is to keep very precise oil/filter changes and shorten the intervals once or twice every couple of years to help eliminate crud a little sooner then every 3k miles. And change the oil while it's hot, or real warm.

I can tell you that I haven't a clue what a rod knock sounds like on the Rodeo, but when my waterpump, followed by the timing belt tensioner went out almost 2 mnths ago, it sounded HORRIBLE. You could hear it knocking miles away - the tensioner gives off the same sound as a rod knocking.

It might be something else to consider, if you have over 100k on the original tensioner. But, I might be stretching here, I don't know.

One thing you can do, to see if it is a rod knocking, get yourself some thicker oil then you normally use, i.e. 10w-40 or even 15w-40, if your daily temps are above 30F. Change your oil, if the sound is somewhat softer, it's most likely an internal issue.

I wouldn't be driving it til you have more of an idea of what's going on.

I'm not quite understanding what you said though, did you use seafoam on two separate occasions? The 1st time having driven one or two days, then changed the oil and put it in a 2nd time?

Or did you add Seafoam on 2 separate occasions, but in the SAME oil just on different days?

Nevermind, just reread your post, you were going to drive it for a day or so after putting it in last night?? You didn't drive it today did you?