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The Terminator
Engine/Tuning
Eaton rattle/tick?
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<blockquote data-quote="exdeath" data-source="post: 8972933" data-attributes="member: 56343"><p>Making a new thread to follow up on:</p><p></p><p><a href="http://www.svtperformance.com/forums/engine-tuning-214/647034-supercharger-pulley-cage-assembly.html" target="_blank">http://www.svtperformance.com/forums/engine-tuning-214/647034-supercharger-pulley-cage-assembly.html</a></p><p></p><p>after isolating the noise to the blower and not the pulley cage.</p><p></p><p>Further research on "eaton" + "tick" or "rattle" reveals that it's a common problem with the Eatons, a plastic coupler disk that connects the drive snout to the driven rotor. I've not seen anything on SVTP about this, but the 3800 M90 guys seem to know all about it.</p><p></p><p>That would explain why it's so quiet and why I was unable to locate the noise source for so long or blame it on the supercharger at first. </p><p></p><p>This coupler is "floated" in the middle of the front housing between the driving and driven hubs and isn't touching the rotor or snout case at all. This is why it was so hard to find it all this time with a stethoscope even though the noise was right under my nose the whole time driving me nuts. Nor is it bolted or positively fastened, it's merely floating and held tight in the space between the two hubs by the pressure of the snout bolts.</p><p></p><p>Here is a good article describing and illustrating the elusive rattling/ticking sound emanating from an Eaton at low RPM which is otherwise in perfect condition and working fine:</p><p></p><p><a href="http://www3.sympatico.ca/aepa/blowerinstall.html" target="_blank"> How to replace an M90 snout coupler without removing the entire blower </a></p></blockquote><p></p>
[QUOTE="exdeath, post: 8972933, member: 56343"] Making a new thread to follow up on: [url]http://www.svtperformance.com/forums/engine-tuning-214/647034-supercharger-pulley-cage-assembly.html[/url] after isolating the noise to the blower and not the pulley cage. Further research on "eaton" + "tick" or "rattle" reveals that it's a common problem with the Eatons, a plastic coupler disk that connects the drive snout to the driven rotor. I've not seen anything on SVTP about this, but the 3800 M90 guys seem to know all about it. That would explain why it's so quiet and why I was unable to locate the noise source for so long or blame it on the supercharger at first. This coupler is "floated" in the middle of the front housing between the driving and driven hubs and isn't touching the rotor or snout case at all. This is why it was so hard to find it all this time with a stethoscope even though the noise was right under my nose the whole time driving me nuts. Nor is it bolted or positively fastened, it's merely floating and held tight in the space between the two hubs by the pressure of the snout bolts. Here is a good article describing and illustrating the elusive rattling/ticking sound emanating from an Eaton at low RPM which is otherwise in perfect condition and working fine: [url="http://www3.sympatico.ca/aepa/blowerinstall.html"] How to replace an M90 snout coupler without removing the entire blower [/url] [/QUOTE]
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