Dannyru89 Posted November 17, 2004 Share Posted November 17, 2004 So I change the T-belts and drive a 1000mi round trip. I get there and I hear what I thought was a failing ball bearing. I guess it was a tensioner going bad after the change in pre-load fron the timing belt change. (both tensioners 25000mi old) Nope. Now I've changed both tensioners and the idler cog thing and this wirring sound is still there. No change in pitch or anything from these repairs. It just sounds like a failing idler. If I idle the car w/the timing covers off and stethascope the oilfilter and housing I can hear it now. I couldn't in my initial diag. This pump has 44,000mi on it, Castrol GTX 10-30/10-40 EVERY 2500-3000mi and Wix filters.. EXCEPT prior to my trip I used a purolator Pure One. I doubt that has anything to do w/it but who knows. I guess I'll throw a pump at it this week. I know there isn't a ball bearing in the pump this is why I'm in such disbelief and why I went for the other three pulleys in the housing first. It was just so hard to hear, even with the V-belt off just the T-belt idling. AHHHHH! Any thoughts folks? History, Stories? Danny. 89' 4xWag EA82T 5spd 225,000mi. really, I love walking to school while waiting for parts, or the for Ru to stop running. Quote Link to comment Share on other sites More sharing options...
Ross Posted November 17, 2004 Share Posted November 17, 2004 Not sure about noisy oil pumps, but i have heard some pretty strange sounds coming from water pumps before. Are you sure the water pump is good? Quote Link to comment Share on other sites More sharing options...
Dannyru89 Posted November 17, 2004 Author Share Posted November 17, 2004 Yes, during Diag I isolated the noise by removing the V-belt for the W/P, P/S, and crank. Idling the car w/ T-belt covers removed in this condition is not recommended but for less than 10-15 sec for diag purposes it worked. (put crankpulley back on to keep RH belt from walking) I concluded that the noise was indeed comming from a t-belt related pulley. I thought it was the cog thing first. (nope) Since the LH idler felt good off the car freewheeling in my hand, but I couldn't test it under load so I replaced it since it was next to the cog and well that wasn't it either. Again, reason for my dismay in that it could be the pump. PSI is good and unchanged and it's not that old. Danny. Quote Link to comment Share on other sites More sharing options...
idosubaru Posted November 17, 2004 Share Posted November 17, 2004 forgive me if the details aren't exactly right, this is all from memory. there are two sprockets on the oil pump shaft. behind the last sprocket or maybe even connected to the back sprocket...again my memory is weak, but there's a *plate* of sorts. a very thin piece of metal. i'm thinking this plate may have detached and whir around, causing this sound. i'd check for a loose plate on the oil pump (with the car off). if i were home i'd check my extra oil pump, but i'm at work. i highly doubt you need to replace your oil pump. 3 XT6's 198,000 / 196,000 and my current daily driver at 204,000 miles with the original oil pumps in them. if you can't find the noise, might have to though. Quote Link to comment Share on other sites More sharing options...
Dannyru89 Posted November 17, 2004 Author Share Posted November 17, 2004 The sound increases in volume from when the car is ston cold to freeway hot. It's louder hot. It almost remindes me of the famous Ford PS pump sound. Like it's cavitating, perhaps I sucked the mickey mouse seal. But, it sounds too metalic, failing bearing metalic. Could the support sleave worn? I took apart an old pump I had and am mystified. I'll be taking it apart tommorw. Danny. Quote Link to comment Share on other sites More sharing options...
Dannyru89 Posted November 19, 2004 Author Share Posted November 19, 2004 Well, I took it apart. O-rings good. Rotor shaft worn and was .0001 smaller than an extra pump shaft I had laying around w/130,000mi on it. (sloppy) The shaft and pump assy housing were worn worse than the 130k shaft and pump assy. (flaking and galling of the alum housing from steel shaft, weird) Remember, this pump has only like 44,000mi on it. Rotor clearance was on the high side of spec, but miked out again smaller than the old rotor head. It was time for replacement. Bad pump? The block looks really good, there is a minor circular wear pattern on the block (back, not side) from the rotor head, but it looks better that some other blocks I have with less miles than this block has. New pump assy should be here Sat, keep your fingers crossed for me. Danny. Quote Link to comment Share on other sites More sharing options...
Dannyru89 Posted November 23, 2004 Author Share Posted November 23, 2004 Well , replacement seems to have taken care of the problem. I still can't beleive that was it, but the sound is gone. I'm going about 1000mi again over T-day so I'll see indeed. Danny. Quote Link to comment Share on other sites More sharing options...
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