Tools and Materials Required:
- Socket set
- Adjustable wrench
- Feeler gauge
- Oil drain pan
- Fresh oil and oil filter
- Gasket for the oil pan (if necessary)
- Spark plug wrench
- Cleaning cloth
Step 1: Preparation:
- Park the vehicle on a level surface and engage the parking brake.
- Allow the engine to cool completely before starting the repair.
- Disconnect the battery's negative terminal to ensure safety while working near electrical components.
Step 2: Locate Tappets:
- Identify the tappets on your Mazda Lantis. Tappets are usually located on the top of the engine, under the valve cover. Refer to your vehicle's service manual or an online guide for specific details about the tappet arrangement on your model.
Step 3: Remove Oil Drain Pan:
- Place an oil drain pan beneath the oil pan of your vehicle.
- Loosen the drain plug using an appropriate socket wrench, allowing the old oil to drain into the pan.
- Once the oil has drained, replace the drain plug and tighten it securely.
Step 4: Remove Valve Cover:
- Locate the valve cover bolts and remove them carefully using the appropriate socket wrench.
- Lift the valve cover off the engine, paying attention to any gasket or sealant that might come off with it.
Step 5: Inspect Tappets:
- You should now be able to see the tappets underneath the valve cover. Inspect them for any visible signs of wear, pitting, or damage.
Step 6: Adjust Tappet Clearances:
- Adjusting tappet clearances involves carefully measuring the gap between the cam lobe and the tappet. You'll need a feeler gauge to do this accurately.
- Refer to your vehicle's service manual for the recommended tappet clearance specifications for your specific engine.
- Loosen the locknut on the tappet adjuster using the appropriate wrench. Insert the appropriate-sized feeler gauge between the cam lobe and the tappet.
- Tighten the locknut while holding the feeler gauge in place until you feel mild resistance. Remove the feeler gauge.
- Repeat this process for all the tappets, following the recommended order in your service manual.
Step 7: Reinstall Valve Cover:
- Carefully place the valve cover back on the engine, making sure the gasket or sealant is properly seated.
- Reinstall the valve cover bolts and tighten them securely in the recommended sequence, as specified in the service manual.
Step 8: Add New Oil:
- Remove the oil filler cap and add new engine oil of the recommended type and quantity. Refer to your vehicle's owner's manual for the correct amount.
Step 9: Start Engine:
- Reconnect the battery's negative terminal.
- Start the engine and let it run for a few minutes. Check the oil pressure indicator on your dashboard to ensure it's within the normal range.
Step 10: Check for Leaks:
- With the engine running, visually inspect the oil pan and valve cover for any leaks. Tighten any loose bolts if necessary.
That should take care of fixing the tappets on your Mazda Lantis 1994. It's important to follow the recommendations and procedures specified in your vehicle's service manual to ensure proper adjustments and avoid further issues. If you're not confident in performing this repair yourself, it's advisable to consult a professional mechanic or have the work done at a reputable automotive repair shop.
