Next determine which valve stem seal it is that you're going to install. A black spring around the valve stem seal means it goes on the exhaust side. A white or silver spring on the valve stem seal means that it goes on the intake side. They are not to be interchanged.
The stem diameter on the intake side is bigger than the stem on the exhaust side and if you mix them up, your exhaust side will leak and your intake side will wear faster than normal.
23) Grab your new valve stem seal and lube up the rubber part with oil or assembly lube and place it over your valve stem. I'm working on the intake side so I grab a white spring valve stem seal.
24) Placed over the valve stem and gently hand push it on, just to make sure it's seated straight and not crooked. THIS IS NOT
correctly on the valve guide, it needs to be pushed on more. Look to next step.
25) Take your 12mm deep socket with handle and place it over the valve stem seal. Then push it onto the valve guide. You'll hear it click and feel the little click when it's in place. There's no need to hammer it on and is unnecessary
Just to show that 12mm fits the valve stem seal perfectly, without damaging the rubber or spring.
Properly installed on the valve guide
26) Grab your valve spring and place the inner spring inside the outer spring (if applicable) paying attention to which end has the tighter coils, because that is considered the bottom and goes towards the valve seat.
27) Lube up the valve springs in oil or assembly lube
28) Place your valve spring(s) back into the head on the valve seat. The bottom of the spring has the coils closer together than the top
29) Place the retainer back on top of the valve spring(s)
The process to get the valve keepers to hold the valve stem and stay put is different depending on which type of valve spring compressor you use. I'm using this type of valve spring compressor so this is the way to put the valve keepers back in.
The valve spring compressor I'm using looks like
30) Carefully place your valve keeper into the retainer. This process is made easier if the valve keeper is lube up with oil or assembly lube.
31) Place the valve spring compressor over the retainer and valve keeper combo
32) Now for the hardest part, trying your best to keep the valve spring compressor straight; begin to push down with all your might until your hands, shoulders, arms and whole body start to shake. That's about the amount of pressure you need to put into compressing the spring enough to get the valve keepers to seat properly.
Now if this happens just remove the valve keeper and try again
Repeat steps 16 - 32 for the rest of the valve springs and valve stem seals. After your done give everything a once over to make sure it all looks right. Then grab your 12mm deep socket and rubber mallet and place the 12mm socket over the retainer and give the retainer a very light hit just to make sure that the valve keepers are in place and secure. Once you're done move onto step 33.
33) Make sure there's still oil in the camshaft journals, if not add some. Engine assemble lube is fine as well
34) Place your camshafts back into its respective spots, intake cam on the intake side and exhaust cam on the exhaust side. Placing the spot where the key goes at the top.
35) Place the key into its spot on the camshaft and slide on the cam gear. Hand tighten the cam gear bolt for now.
36) Place a generous amount of oil or assembly lube all over the cams
37) Re-install the cam holders onto the camshafts
38) Then the cam holder plates back into its respective side and tighten the bolts down starting from the middle 12mm bolts working your way out and then finally the 10mm bolts.
39) Now grab two 5mm punches or allen keys and stick them through the cam plate holder and cam holder into the cam
Located here on a B18C1/5 head
I'm not too sure if it's in the same place on the B18A/B heads, but you'll be able to find it if you look around for it.
40) Torque down the cam gear bolts to 41 ft lbs for vtec heads and 27 ft lbs for non-vtec heads