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Kent, good idea, but I'm pretty sure it's not knock:

- it happens at Tire speed, not Engine speed. E.g., I can downshift and the noise happens at the same rate.? I'd estimate the tink sounds are happening roughly 10 per second.
- this van has 205/60 R16 tires which have a diameter of 25.7", or a circumference of π x D = about 81 inches.
- at 60mph, the tires are traveling 60 mph * 5280 ft/mile * 12 inches/ft / 3600 seconds/hour = 1056 inches per second / 81 inches per revolution = about 13 revolutions per second.
- if it were knock, it would be happening at engine RPM - and even if it were only knocking on 1 cylinder, when driving at 3000 RPM, it would be happening at least 50 times per second.
- Also, dear sir, in spite of your suggestion that I am a cheapskate, I run 91 octane gas! :-)

In conclusion, I'm pretty sure it's drivetrain-related.

Mike

p.s. where does one find 93 octane no-ethanol gas?? At an airport?



> On Jul 21, 2021, at 6:23 PM, Kent Kirkley via groups.io <kgkirkley=[email protected]> wrote:
>
> Michael
>
>
> "tink. tink, tink"?
> Would you say a 'rattling'?
> Sound like pre detonation ('knock' is another term) to me.
> What grade of fuel are you using?
> I'm betting the cheapest 87 grade you can find??
> Pre detonation can damage the engine.
> Fill it up with the highest grade fuel you can find, like 93.
> Ethonal free is even better.
> Dam the cost, you'll have no more "tick, tick, tick", better performance
> better miles per gallon.
> Kent Kirkley
> '97EVC
>
>
>
> -----Original Message-----
> From: Michael Diehr <md03@...>
> To: [email protected]
> Sent: Wed, Jul 21, 2021 7:56 pm
> Subject: Re: [eurovanupdate] Help Solve the Mystery!
>
> Revisiting an old thread...
>
> 2000 EVC with about 110K miles.
>
> Symptom: since purchasing the van at 70K miles, I've had a "tink tink tink" noise that happens under acceleration, is worse after driving a while (e.g. after things have warmed up), varies with the speed of the wheel (not the engine), and also seems worse when the van is heavily loaded.
>
> Most people have said "CV Joint" and so in 2018 I replaced the right, inner CV joint.? Problem remained.
>
> In June 2021, I replaced the entire right axle (with both outer and inner CV joints).? Problem remained.
>
> So, what's left?? The sound definitely seems to be on the right side of the vehicle, but maybe it's from actually coming the left side?? Wheel Bearings?? Half shaft?
>
> Remanufactured axles are cheap now (under $200) so I could just replace the left side to be prudent.
>
>
>
>
> >
> >> On Apr 30, 2018, at 7:17 PM, Michael Diehr md03@... [ev_update] <ev_update@...> wrote:
> >>
> >>
> >>
> >> Following this thread with interest - have similar symptoms and replaced the right inner CV joint at 70K miles, but the problem remained, and am now thinking it's the outer CV joint, and am also thinking "replacing the whole axle".
> >>
> >> It's notable that the sound (a "tink tink tink" sound that only happens on acceleration) is more prominent when the van is heavily loaded.? It also comes on only after a while (as if the CV joint must get hot first).
> >>
> >>
> >>
> >>
> >>> On Apr 27, 2018, at 7:12 PM, wli98122@... [ev_update] <ev_update@...> wrote:
> >>>
> >>>
> >>>
> >>> We have had similar symptoms. Had to replace BOTH inner and outer CV joints on both sides. Upon inspection, it was the inner ones that failed due to decay of the lubricant (dry dust) and deep scoring of the runs, whereas the outer joints were fine with nice grease and shiny runs. One thing: all the CV boots were intact, with no cuts or holes in them. Our experience was unusual, since most of the time it is the outer CV joints that fail, due to holes in the boots that let grime and dirt in. This occurred for us around 120K miles. Now have 170K and both are still silent.
> >>>
> >>> w. Li 95 EVC 5-speed
> >>>
> >>
> >>
> >>
> >> __._,_.___
> >> Posted by: Michael Diehr <md03@...>
> >>
> >>
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> >>
> >>
> >>
> >>
> >> VISIT YOUR GROUP
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> >>
> >> __,_._,___
> >
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