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post #1 of 12 (permalink) Old 12-15-2018, 07:11 AM Thread Starter
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Whine After Startup

I've had my Elise for about 9 months now and it's always had a whine for the first few minutes of driving. It starts up fine and sounds fine at idle but once you get going above 2k rpm, it starts whining from the passenger side. It continues in sync with engine rpm for a few minutes and then goes away. Once hot, it's gone. I'm getting ready to replace the serpentine belt but I was wondering if anyone else has had this happen. Should I be taking a close look at the pulleys and if they have much play?

1970 Europa S2 Carnival Red
2005 Elise Krypton Green
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post #2 of 12 (permalink) Old 12-15-2018, 05:04 PM Thread Starter
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Well I think I found my problem. After removal, I noticed the inner rib of the belt was worn way down so I went looking for the culprit. I also noticed the idler pulley that sits in place of the power steering pump was wobbling. Then I saw this...

The idler looks to be spinning on a long bolt. Before I mess something up, can someone confirm that this is standard right hand thread? Will I be able to loosen the bolt, slide it back a couple inches, and remove the pulley?

Lastly, is there a source for this pulley?
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1970 Europa S2 Carnival Red
2005 Elise Krypton Green
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post #3 of 12 (permalink) Old 12-15-2018, 05:44 PM
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Appears to be part 4 and the associated bolt, nut, and spacer in the diagram here https://www.lotusgarage.com/index.ph...uct_list&c=131 . You can probably get it from a dealer too, no idea if there's an alternative Toyota part number or not.
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post #4 of 12 (permalink) Old 12-15-2018, 06:34 PM Thread Starter
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Thanks. It is part 4. I found this thread which showed me all the parts and I was able to get it off. Apparently, in '05, the bolt is assembled from the inside but in '06, it comes in from the outside which means you have to undo some engine mounts and jack up the engine enough to clear the frame while sliding the bolt out. Glad I have an '05. But, alas, I will be ordering a new pulley.

1970 Europa S2 Carnival Red
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post #5 of 12 (permalink) Old 08-03-2019, 04:29 PM Thread Starter
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Putting this thread back at the top...

I've long since replaced the pulley and the belt is wearing evenly but it didn't fix the noise. I had some time today so I pulled the serpentine belt again and ran the engine for a few minutes with no belt to diagnose whether it's coming from an accessory or inside the engine. It still made the noise. I took
after putting everything back together. I was holding my phone up by the passenger headrest. Shortly after the coolant reached 180F, the noise went away.

1970 Europa S2 Carnival Red
2005 Elise Krypton Green
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post #6 of 12 (permalink) Old 08-04-2019, 03:25 AM
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It's hard to hear in the video, does the noise occur when you are decelerating?
At 180f your coolant thermostat opens any chance this is related to your coolant system?
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post #7 of 12 (permalink) Old 08-04-2019, 04:41 AM Thread Starter
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Yes, accelerating and decelerating but it's not gearbox dependent. It also occurs when sitting still and revving. I thought it might be the water pump or alternator but it can't be them if the noise still occurs without a serpentine belt.

1970 Europa S2 Carnival Red
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post #8 of 12 (permalink) Old 08-04-2019, 05:01 AM
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I would guess that if the noise is dependant and on engine rpm and temperature, and not dependant on transmission gear or road speed, it almost has to be the water pump. My guess is that as time goes on it will become louder and then it will do it regardless of engine temperature.

You might think about picking up a mechanic's stethoscope to help pinpoint the noise to confirm. They're cheap (<$10) and pretty easy to use, just be careful using the probe around a moving belt, when I was about 16 I had a set yanked off my head when I was checking an alternator; that gets your attention quick...

2005 Ardent Red Elise, Gut Sport wing & splitter, custom diffuser, Sector111: DSBrace, gPan3, subStuffy2, Larini Sport muffler, decat pipe, Schroth Racing 5 pts, wheel studs, Team Dynamics 1.2 with Hoosier A6s, Koldflash 200 ECU flash, BOE rear clam hinge, BC Racing single adjustables, Hawk pads, SS Brake Lines, HID lights, custom tail and high mount brake light...and much more...
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post #9 of 12 (permalink) Old 08-04-2019, 10:54 AM Thread Starter
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I'm with you but it makes the same noise without the serpentine belt which means the alternator and water pump are not spinning. Is there a failure mode to the timing chain guides or tensioner that could cause this noise?

1970 Europa S2 Carnival Red
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post #10 of 12 (permalink) Old 08-04-2019, 11:37 AM
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Idle control valves can make a whine if they are leaking. Since theres a change when you get to temp maybe thats influencing it.

Do you get the whine after its warmed up with everything installed as normal?

I wouldnt expect the whine to be as loud as what you have though.

Try un plugging it. It should then always be there
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post #11 of 12 (permalink) Old 08-04-2019, 11:26 PM
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My 111r whines from the brake servo while accelerating or starting up (building up vacuum and releasing through the servo drum). If i accelerate or start the engine while pressing the brake pedal a bit the whine isn't there. Small chance but you may try to rule that out. (Replacement servo on the shelf already)
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post #12 of 12 (permalink) Old 08-05-2019, 03:08 PM Thread Starter
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OK, I'll give the idle control valve and brakes a try this week.

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