The 3.4L TRD Supercharger Thread
- Thread starter SCRunner12
- Start date
Rjsimeon
New member
Can someone please help diagnose the problem? Getting a weird knocking/rattling sounds like in the nose cone. Just reinstalled it after rebuilding (put new bearings in and coupler). Took the belt off and I can spin the pulley without too much force. No sounds when spinning by hand that I could hear. This is when the engine turned on...
https://vimeo.com/138149258
Tempted to remove and check the inside out again to see what's going on but would like to hear suggestions first. Disappointing when you think you've done a good job rebuilding but ends up with more problems than before. This was just a peace of mind thing now it's become a head ache!
https://vimeo.com/138149258
Tempted to remove and check the inside out again to see what's going on but would like to hear suggestions first. Disappointing when you think you've done a good job rebuilding but ends up with more problems than before. This was just a peace of mind thing now it's become a head ache!
MTD
New member
You will see about 6 typically at the higher Rs and 7 under load and at wot on a hill. 5 max is a little low, but if the blower isn't making noise it is fine.
MTD
New member
It is the straight cut gears loading up when you start making boost, not the belt lol.Random fluff question, from you guys who know more about these things:
If you're driving gently, up and down through the RPM ranges, you don't hear much from the SC. But when you get it on it and load the engine, you get that lovely whine while the SC is doing work.
Why does that happen? What's making that sound?
It can't be RPM (can it?) since it's driven off the belt and spinning faster or slower regardless of engine load, and the compressor is always engaged (right? Or am I underestimating the complexity of this lovely device?)
I assume it must be because boosting pressure when you goose it, and I'm interested in the difference between normal operation at 2500 RPM and loaded operation at 2500 RPM (ie. when it's whining.) Is it just simple mechanics of the pressure difference? Is the pressure regulator involved?
opcorn:
Google a video of a sequential gear box in a racecar if you don't believe me
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Rjsimeon
New member
Rjsimeon
New member
Positive it's coming from the SC. Only thing I could think of is when I pressed the shaft in, I pressed it in too far, far enough to press the seal with it just a tad so I backed the shaft out. I'm wondering if the bearing got pushed back with it.
tx_shooter
New member
Anyone have any thoughts on this "weird noise"? I replaced the nosecone tonight for the 200k mile service. When I was taking off the old nose cone the assembly came out a little bit; but not much. Once I put it all back together I have this almost rattling coming from the supercharger. It makes solid boost still and gets a little quieter with RPMs; but I still feel pretty uneasy about it.
tx_shooter
New member
tx_shooter
New member
Maybe; but at least you know it isn't supposed to be church-mouse quiet. Since mine has ~160k miles on it I plan to go ahead and rebuild it. Looks like I will have a busy day in a few weeks.
Rjsimeon
New member
True. Thanks for the info. Makes me at ease a little bit. Gonna check it out this weekend but if everything checks good when I reinstall it then I don't think I'll worry too much about it.
MTD
New member
Idk if my post got deleted, but I would advise not doing the rotor pack bearings yourself.
tx_shooter
New member
lhsoulrebel
New member
It sounds similar to what mine sounded like...I changed the coupler to no avail... It ended up being that my pulley egged out a bit, and was rattling on the key. If you take off the belt, and rotate the pulley back and forth and you can feel slack or hear the rattle, that's what it most likely is (after you rule out the coupler). It fixed my rattle.... But unfortunately I had to buy a performance pulley which leads to a whole other set of issues...
MTD
New member
not that I can think of. If you have any gouging on the case were the rotors were contacting you can clean that up with some 4000 grit sandpaper. Other than that there isn't much.
shootmymime
New member
tx_shooter
New member
Yeah; 4000 isn't in my stock of normal sandpaper. I keep 2000 on hand for when something needs some finesse; but not 4000. lol
oakraider09
New member
So I have a quick question that id like some honest opinions about I recently bought a 96 Trd runner supercharged and what not its running great other than a check engine light due to knock sensor which I will be fixing tomorrow. The engine is original with 267k miles and I am wondering if that's too many miles to expect it to make a long trip of 400 miles and 7 hours I am moving and would like to take it with me but I definatly don't want to end up on the side of the road broken down, I understand everyone says these 3.4s are bullet proof but I need a little more confirmation on if any of you would do something like that, and if so what precautions would u take thanks!
