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Showing results for tags 'motor mount'.
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Good evening, gentlemen! (or morning to everyone in the land of Oz) Welcome to another round of diagnose the noise! If you're keen to humor me feel free to read on Here's the context : The outer boot of the original passenger CV axle broke, and was driven on for probably longer than it should have been, plus I currently live in an apartment where I am not allowed to work on my own vehicle, so I had a local Subaru specialty shop put a new axle in for me. I couldn't find an OEM axle so I had an import direct axle from Oreilly put in (and have the old axle in the closet so I can rebuild it for a spare). On the drive home I noticed a new noise and went back to the shop the next time I was in the big city, they said that their best guess is the noise is from my engine "slapping around" due to not being completely mounted and that they would install the two missing motor mount bolts for the low low price of $450 to see if it helped, and that they would not diagnose the noise further until I had the bolts installed. It's true that I only have the front bolt installed on each motor mount bracket, but I've now driven over 25k miles like this without issue so I'm pretty dubious about their diagnosis. Here's the noise : (Pretty similar description to this other recent post I found digging through the search today) A rhythmic/speed related, knocking/ticking, it gets louder and faster as you move from 5-25mph, then continues to get faster and never really goes away, but disappears into the blur of road noise from 35mph and up, the pitch doesn't change ..just the speed. It seems to match tire rotation speed. Once the car is warm it quiets down a bit, and so far has just been a noise, no drivability issues. After about 1200 miles now it's starting to get noticeably louder and worse. And the conditions: -It only happens when the engine is under load, if you're coasting down hill, or foot off the gas, or the second you take it out of gear, the noise is completely gone. -It gets a bit worse making right turns, and almost completely goes away making left turns I have a pretty good guess that my problem is a crap aftermarket axle that's been noisy from the day I had it put on, and the shop that put it on just doesn't want to deal with my old Subie anymore, (not sure why because I love this old thing) but I figure I should post here and see what you all think - if you're not sick of guessing at my old '87 GL's quirks yet. The only reason I'm not totally confident about it being the inner joint of the CV axle is that it completely goes away if the engine isn't under load and I have a hard time imagining how an axle that sounds that bad under load could somehow be completely quiet just because it's coasting. Any thoughts are welcome, thanks as always gents.