VAICO cam adjusters……hmmmm

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4.2 V8 40v biturbo - 480 bhp (plus)
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Nobby
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VAICO cam adjusters……hmmmm

Post by Nobby » Sun Feb 02, 2025 8:51 pm

Hi all

A couple of weeks back I had an error come up. Bank A cam adjuster solenoid short to ground etc…

Car was driving fine so had a look into things.

Believe it basically means the solenoid of the near side cam adjuster is stuck or has electrical issue. I think I chalked the signal at the plug and it’s all ok but the solenoid pins are showing too much resistance.

I’ve also been collecting parts to do my cambelt for a while and had scheduled to do it in a few weeks but now I obviously need to source something to fix the adjuster.

Genuine Audi ones are now nearer £8/900 EACH! Cheap Chinese ones are still around the £150/200 mark. Even the VAICO ones and FAI are £500!

I shopped around and found a LHS adjuster for £365 after discount so bought one.

As a temporary stop gap I unplugged the connector and connected to the new part and voila the error didn’t come back. As a quick win I thought I’d then swap over the solenoid onto the Audi adjuster in situ.

And there’s a problem. During assembly the solenoid has been bolted on and pinched the (oil) seal. :shock:

Bugger. I’ve emailed the UK supplier and they have been in touch with VAICO themselves. No word yet but doesn’t fill me with confidence in the parts.
IMG_1176.jpeg
Green o ring is squashed
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Felix2566
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Re: VAICO cam adjusters……hmmmm

Post by Felix2566 » Sun Feb 02, 2025 10:16 pm

Wow, such a lucky find!

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Shoppinit
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Re: VAICO cam adjusters……hmmmm

Post by Shoppinit » Mon Feb 03, 2025 9:31 am

It was like this when you bought it or after fitting it?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
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Nobby
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Re: VAICO cam adjusters……hmmmm

Post by Nobby » Mon Feb 03, 2025 2:59 pm

When I bought it. The solenoid didn’t look flush with the unit and when I unbolted you could see it’s not been assembled properly. Didn’t even put it near my car.

Also worth noting that thankfully this is for the NS bank which fits at the front of the engine. Much easier to see.
The OS one is at the back by the firewall and much harder to see.
Daytona RS6 Avant
Rule #36 - At least one gear shall be dropped for every tunnel travelled

** NOW AVAILABLE ** C5 RS6 Cambelt Tool kit rental (also fits other models 3.7/4.2 V8 engines)

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Shoppinit
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Re: VAICO cam adjusters……hmmmm

Post by Shoppinit » Mon Feb 03, 2025 3:02 pm

Gotcha. That's bloody annoying, but these things happen. It's not necessarily a sign to worry about the quality of the design.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Nobby
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Re: VAICO cam adjusters……hmmmm

Post by Nobby » Mon Feb 03, 2025 3:03 pm

IMG_1177.jpeg
Mind the gap
You can see the thin gap between the solenoid and rhe adjuster near the top. It was on tight but obviously could leak out hot high pressure oil.
Daytona RS6 Avant
Rule #36 - At least one gear shall be dropped for every tunnel travelled

** NOW AVAILABLE ** C5 RS6 Cambelt Tool kit rental (also fits other models 3.7/4.2 V8 engines)

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Nobby
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Re: VAICO cam adjusters……hmmmm

Post by Nobby » Thu Feb 06, 2025 10:20 pm

Just to keep you all updated - replacement on its way. Not sure about the old one yet. Hoping to do Camelot change around half term too.
Daytona RS6 Avant
Rule #36 - At least one gear shall be dropped for every tunnel travelled

** NOW AVAILABLE ** C5 RS6 Cambelt Tool kit rental (also fits other models 3.7/4.2 V8 engines)

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