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Not all modern engines need you to set the valve clearances. Most engines use oil filled 'tappets' that self adjust the clearance as the oil temperature changes. Depending on which engine it is yours has a lot of the time you can only check the valve clearance but not adjust it.
The valve tappet clearance for the Mazda Bongo Brawny can vary depending on the specific engine model and year. Here are some general specifications for the different engine types:
2.0L FE engine: Intake valve clearance - 0.18-0.22mm, Exhaust valve clearance - 0.28-0.32mm
2.5L WL engine: Intake valve clearance - 0.20-0.25mm, Exhaust valve clearance - 0.30-0.35mm
2.5L RF engine: Intake valve clearance - 0.20-0.25mm, Exhaust valve clearance - 0.30-0.35mm
It's important to note that the valve tappet clearance should be checked and adjusted by a qualified mechanic using the correct specifications and tools. Incorrect adjustment can cause engine damage and poor performance.
you haven't mentioned if it is a 4 cyl or not. However bring no 1 cylinder up to tdc and watch the tappets of the next cylinder to fire. when that cylinders rockers are in valve overlap situation ( exhaust starting to close and inlet starting to open) then that will be maximum clearance on no 1 cylinder and is when you set the tappets turning the engine until the next cylinder is at TDC watch for the next cylinder again to be in valve overlap and repeat as for no 1 cylinder
Three sizes of pistons are available:
1. Std.
2. Over size 0.010 in (0.25 mm).
3. Over size 0.020 in (0.50 mm).
Over sized pistons and rings are widely used in all automobiles with no trouble at all. They last for more than 200,000 km, provided if the engine oil, oil filter and air filters are replaced at the recommended intervals.
The most important point to consider here is to maintain the oil clearances between the various parts during the machining process.
For example piston to cylinder clearance, crankshaft to main journals and big ends clearance, valve to guide clearance, at room temperature. Then comes cleaning process and the engine assembling process.
As a rule of thumb most valve clearences are .010" inlet and.012" exhaust ( hot) but I suspect yous will have hydraulic tappets which take up the clearence as soon as the oil pressure comes up
Depends on many variables, such as, make, model, engine, type of transmission, year of manufacture, type of valve tappets or cam followers, (solid or Hydraulic). Solid lifters in an old hot rot Ford Depends on cam size. So a .010" intake clearance and .012" exhaust clearance is a good starting point for a 289 - 302 cid carb. engine. If you have a hyd. type of lifter, with engine running you loosen the rocker until it starts ticking and tighten it back down till it stops then 1/2 to 1 whole turn more. Repost with more info about your engine, car setup. Hope this Fixya up.
The tappet clearence should be in the owners handbook but it's a bit early a tappet noise from the engine (2006) ! Check oil level and change if it's overdue a service is definately worth a look ! Good luck
New adjustment shim =Removed shim thickness+ measured valve clearance- STANDARD VALVE CLEARANCE (0.26 mm or 0.010 inch)
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