Vorsprung Autowerk 3.0T Oil Check Valve Set (Timing Chain Tensioner)
Vorsprung Autowerk: 3.0T Oil Check Valve Set
Is your Audi starting to sound like a diesel tractor for those first few seconds every morning? That dreaded 1–3 second rattle on cold start is the calling card of the 3.0T engine, and it's usually caused by oil draining out of the cylinder heads and timing chain tensioners while the car sits.
Our Oil Check Valves are the essential fix to keep oil where it belongs: at the top of your engine.
The "Silent Start" Solution
On many 3.0T models (especially the B8.5), Audi replaced these valves with blank plugs. Without a functional check valve, oil pressure bleeds off when the engine is off. When you start the car, the hydraulic timing chain tensioners are "empty," causing the chain to slap against the guides until oil pressure builds back up.
Vorsprung Autowerk Check Valves prevent this drain-back, ensuring instant lubrication and a quiet, rattle-free startup.
Why Install These?
Eliminate Startup Rattle: Keeps the timing chain tensioners primed with oil for immediate tension upon ignition.
Protect Your Guides: By stopping the "chain slap" at startup, you reduce the wear and tear on your plastic timing guides, potentially saving you from a $5,000+ engine-out timing job.
OEM+ Engineering: Designed to meet or exceed factory specifications with high-quality internal springs and seals that won't fail like the original units.
The "While You're In There" Essential: Located in the engine valley, these are the perfect companion to a PCV, Thermostat, or Supercharger service.
Vehicle Fitment
Includes two (2) check valves for a complete valley service.
| Make | Model | Years | Engine |
|---|---|---|---|
| Audi | S4, S5, SQ5, A6, A7, Q7 | 2009–2017 (S5 2010-2017, SQ5 2014-2017) | 3.0L V6 Supercharged (EA837) |
S5 / A5 NOTE: 2010-2012 fitment is the S5 Cabriolet only (the 2008-2012 S5 coupe has the 4.2 V8). The A5 was never sold with the supercharged 3.0T in North America; the European-market B8.5 A5 3.0 TFSI (2012-2016) uses the same EA837 engine, so confirm your engine code before ordering.
NOTE: Stop the rattle before it stops your engine. Not sure if this fits your build? Email us at help@vorsprungautowerk.com.
Check Valve Set FAQ
What causes the cold-start rattle on the 3.0T?
On many 3.0T models (especially the B8.5), Audi used blank plugs instead of functional check valves. Without them, oil pressure bleeds off overnight, so the hydraulic timing chain tensioners start out "empty" and the chain slaps against the guides until oil pressure builds back up.
Will this actually protect my timing guides?
Yes. Stopping the chain slap at startup reduces wear on the plastic timing guides, which is the failure that leads to a $5,000+ engine-out timing job.
How many valves are in this kit?
Two (2) check valves, enough for a complete valley service.
Should I do this at the same time as other valley work?
Yes - since the valley is already exposed, these are a natural companion to a PCV, thermostat, or supercharger service.
Why Buy From Us?
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✅Enthusiast Designed & Tested: Developed by people who actually drive and modify these cars.
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✅Tested on Our Own Cars: If we wouldn't run it ourselves, we don't sell it.
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✅Continuous R&D: We continually develop and improve our products instead of relying on generic catalog parts.
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✅Supporting Audi Platform Development: Your purchase helps fund continued development of new parts for these chassis.
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✅Real Enthusiast Support: Get help from people who understand the platform, not ticket bots.
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✅Small Team, Big Passion: Every order directly supports continued product development and innovation.
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✅Performance Without the Marketing Fluff: Purpose-built parts designed to perform.
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Please read our FAQs page to find out more.
Are OEM products more expensive than aftermarket alternatives?
OEM products might have a higher upfront cost compared to aftermarket parts, but their superior quality and durability often make them a more cost-effective choice over time. Investing in OEM ensures you’re getting parts specifically designed for your vehicle, which can lead to better performance and longevity.
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Are parts from brands like Mopar, ACDelco, and Motorcraft interchangeable between different vehicle brands?
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Can I install OEM parts myself, or is it better to have a professional handle it?
While some OEM parts can be installed by DIY enthusiasts, the complexity of installation can vary. For the best results and to ensure proper fitment and performance, we recommend having a trained mechanic install the parts, especially if you’re unfamiliar with automotive repairs.
Do OEM parts come with a warranty?
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