Rattle from exhaust system
#1
Rattle from exhaust system
Ok im having a head scratching moment I have a full SS system racing beat header , borla catback and a racing beat race pipe/ bhr high flow cat but im getting a weird buzzing rattle noise its not that prominent with the bhr pipe but very noticeable with the RB decat (unresonated) ive checked underneath there is nothing touch any metal and ive reseated twice now so what could it be its almost like im getting transference from the engine cos the rattle/buzz can be heard all the way down I dont know where to look.
#2
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if it is distinctly metal on metal, and the BHR muffles it but does not remove it, then it should be upstream of the BHR resonator and inside the exhaust stream, so likely the header.
If a "rasp" is closer to the noise you are hearing, then that is almost assuredly the header, as the engine is naturally raspy, and the BHR resonator is the only one that effectively kills the rasp for an OEM header and whatever catback. The RB header might be making it rasp enough that the BHR can't muffle it totally.
If a "rasp" is closer to the noise you are hearing, then that is almost assuredly the header, as the engine is naturally raspy, and the BHR resonator is the only one that effectively kills the rasp for an OEM header and whatever catback. The RB header might be making it rasp enough that the BHR can't muffle it totally.
#6
ok didnt have time to record the rattle had to refit my bhr pipe ready for a track day but the rattle is still there but less noisy so its coming from the header or beyond im gonna get under and check the header bolts but I had the same rattle with the other ss header I had that gor replace so could there be an engine issue causing the rattle
#8
I was getting the same rattle, worse when i put it in reverse, none of my pipes were touching metal either. Motor mounts was the culprit. I just put in those new mounts from rx8 performance.
#10
Well finally changed my mounts but still have the rattle so tomorrow il go out and remove the Borla catback and refit it or maybe refit my oem backbox depends on weather this is just getting a bit frustrating people are now commenting on how I need a new exhaust cos mine sounds like a bag of spanners
#11
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Verify that you have no metal-on-metal scrubbing near your exhaust hangers.
I had some length fitment issues with a midpipe installed and the rubber exhaust hanger..grommet? Whatever the rubber piece is that you attach your exhaust hangars to was being squished and the hanger was tapping onto the brace on the car. Bending the protruding part of the brace out of the way fixed this problem. This was on the farthest hangar on the passenger side at the back of the car(under the trunk). Check these to see that the rubber mounts aren't wearing out and getting too squishy and allowing the exhaust hangers to tap in places they shouldn't be.
I had some length fitment issues with a midpipe installed and the rubber exhaust hanger..grommet? Whatever the rubber piece is that you attach your exhaust hangars to was being squished and the hanger was tapping onto the brace on the car. Bending the protruding part of the brace out of the way fixed this problem. This was on the farthest hangar on the passenger side at the back of the car(under the trunk). Check these to see that the rubber mounts aren't wearing out and getting too squishy and allowing the exhaust hangers to tap in places they shouldn't be.
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I have had this same rattle for a while myself. Same symptoms as well, including the changing as things get hot. If I put my foot on one of the exhaust tips it stops, so its a vibration of some kind, just dont know were.
#21
Greg have you tried using better bolts on the manifold's end? I had it happen to a friend once and that's what caused the rattle since the flanges weren't mated tight enough.
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