DNJ
DNJ Valve Guide 2012-2021 Mazda 2.0L-2.5L
DNJ Valve Guide 2012-2021 Mazda 2.0L-2.5L
Part number: VGI4309
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Listed for: 2012–2021 MazdaFitment notes & questions
DNJ Valve Guide for the 2012–2021 Mazda with the 2.0L engine. Intake valves let the air and fuel mixture into the cylinder; exhaust valves let the burned gases out. Part number: VGI4309.
Specifications
- Brand: DNJ
- Part type: Valve
- Part number: VGI4309
- Engine: 2.0L
Fitment for the 2012–2021 Mazda
- Years: 2012–2021
- Vehicles: Mazda 2.0L-2.5L
Check your year, model, engine and trim against this list before you order.
What it does
Valves are usually replaced during a cylinder head rebuild, along with guides, seals and a valve job. Using the correct part for your exact engine keeps oil pressure, sealing and timing where the engine was designed to run, and doing related parts at the same time saves taking it apart twice.
Installation & tips
- Have the valve seats cut or lapped so the new valves seal fully.
- Valve stem seals: Always new with new valves.
- Head gasket: The head comes off for this job.
- Put the new part next to the old one and compare the shape, mounting points and connections before you install it.
- Work on a cool engine with the vehicle secured, and use a service manual for your vehicle for torque specs and procedures.
FAQ
What is the part number of this valve guide?
VGI4309 (DNJ). Compare it with the number on your old part or in your parts catalog.
Which engine is it for?
It is listed for the 2.0L engine in the 2012–2021 Mazda. Check the engine code on your vehicle if it was offered with more than one engine.
Can I install it myself?
Many owners do this job at home with basic tools and a service manual for their vehicle. If you are not sure, have it fitted by a qualified mechanic.
Before you order
- Confirm your year, make, model, engine and trim match the fitment listed above (2012–2021 Mazda 2.0L).
- Compare part number VGI4309 with your original part.
Good to know
- Warranty: 12 month or 12,000 mile warranty whichever comes first. Warranty must be requested by the original purchaser and is limited to the replacement of the alleged defective part(s) only.
DNJ engine valves for the Mazda: what to know
Burned or bent valves cause misfires and low compression. Guides that wear let valves wobble and burn oil.
Fitment notes
- Listed for: 2012–2021 Mazda.
- Model years: 2012–2021. If your year sits at the edge of the range, check the details above.
- Engine: match the engine size and code to your vehicle; the same model often came with several engines.
- Specs, lead time and warranty come from DNJ and can change. The details above this guide are the latest we have.
Not sure it fits? Message us your vehicle details and we'll double-check fitment before you buy.
Ask about fitmentWhat else to plan for
- Valve stem seals. Always new with new valves.
- Head gasket. The head comes off for this job.
More for your car: Mazda Valve Guides · Mazda Parts · All Intake Valves · Engine
Questions about Mazda engine valves
Will this fit my Mazda?
How do I know a valve is bad?
Where do specs and warranty details come from?
Questions & answers
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