Honda CBR600RR '03 Service Manual Chapter 09 - Cylinder - Heads And Valves
Specifications and Main Features
- Engine Model compression pressure of 1,226 kPa which comes to around 12.5 kgf/cm squared or roughly 178 psi which can be accomplished at an Engine Model speed of 350 rpm.
- The IN and OUT valves also come with a valve clearance as specified below:
- IN empties at a clearance of 0.008 to 0.001 inch whereas the EX clears at a range of 0.011 to 0.001 inch
- In regards to the camshaft specifications,
- As for the service limits, IN operates between 36.36 to 36.60 mm and EX between 35.34 to 35.58. The runout for the camshaft is as low as 0.05 mm. Oil clearance runs between 0.020 to .062 mm while the service limit is at 0.10 mm.
- The dimensions of the lifters are as follows:
- The upper diameter range of the lifters runs between 25.978 - 25.993 mm while the lower limit sits at 25.97 mm. The internal diameter also has a bigger range of 26.010 - 26.026 mm while the lower limit is set at 26.04 mm.
- The size of the valve is as follows:
- The outer diameter stems for valves comes at a range of 3.975 - 3.990 for IN and 3.965 to 3.980 for EX qualifiers, the service limit for both stems comes to 3.965 and 3.955 gauges.
- Valve guide I D (IN/EX): Valvule caliper inside diameter’ service limit has an outside dimension of ‘4.04 mm’ and strives to achieve range of 4 mm to 4.012 mm.
- Stem-to-guide clearance
- Figure 6-15 describes the workings of stem-to-guide clearance.
- IN: Stem-to-guide clearance has an acceptable service limit of 0.075 mm and is calculated to be in the range of 0.01 to 0.037 mm.
- EX: It is found out that the acceptable range for stem-to guide clearance is between 0.020 to 0.047 mm, while the service limit calculated has an upper range of 0.085 mm.
- Valve guide projection above cylinder head
- IN: Valve guide ceases to operate under IN settings is indicated if the 17 mm mark on the ruler is crossed, while maximum operational range is 17.4 mm.
- EX: Under EX settings, it is ensured that the working range does not exceed 13.6 mm while the ear mark on the ruler is set at 13.3 mm.
- Valve seat width:
- IN: it is found out that a functional valve has a seat width of 0.09 to 1.10 mm with a service limit of 1.5 mm.
- EX: the size and seat width of a valve are found to be in the same ranges which are found out in the previous case while the service limit remains at 1.5 mm.
- Valve spring free length
- IN:
- Inner: The acceptable service limit of 35.1 mm (1.39 inch) is found to be accurate as Outer range is set at 36.17 mm (1.24 inch).
- Outer: 39.76 mm (1.56 inch), the Ideal value settled at for free length of an outer valve spring is 38.8 mm.
- EX:
- Inner: 35.34 mm (1.39 inch), service of 34.4 mm (1.35 inch) enclose the real range.
- Outer: Given ideal and free lengths of 39.05 mm ((1.53 inch) and 38.8 mm (1.50 inch).
- Cylinder head warpage service limit: A boundary of 0.1 mm of distortion is set as an acceptable limit for working on an element.
- Torque values:
- Cylinder head mounting bolt: Range of 35 N m to 4.8 kgf m is found to be the maximum safe working limit ensuring a balance between 47 N m bolts is achieved.
- Spark Plug: 16 N-M (1.6 Kgf-m, 12 Ibf-ft)
Frequently Asked Questions
Q: What is the acceptable range of compression for the cylinder for this engine model?
A: Acceptable range of compression in the cylinder should find value between 12.5 kgf/cm² (178 psi) with a maximum of 1226 kPa at an engine RPM of 350.
Q: How much valve has to be allowance on the both intake and exhaust respective?
A: The allowance to endorsed valve for intake side is 0.009 inches (0.23 mm) and on the exhaust side should be at 0.31 mm (0.012 in).
Q: What instrument and tools do I need for measuring camshaft runout?
A: A service limit how 0.005 mm over 0.002 is how one can find out the camshaft run-out by using a dial gauge.
Q: What’s the maximum acceptable valve guide id limit?
A: They have a maximum cut off at 4.04mm and anything below that is fine since it's see through, the rest is 0.159 in(service limit on valve guide).
Q: What is the ideal torque to tighten the chm head mounting bolts?
A: Ideal terms for mounting the machine head bolts are 47ncm (4.8 Kgf-m, 35 Ibf-ft).
User Manual
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