Ok guys.... crower says there there is 2 numbers for retainers for a B16A how do I tell what teh inst ht is and Spring coil bind

87093 Titanium Retainers for B16A/B18C/B17A fits #68185, #68186 spring 5.5
grams
87093D Titanium Retainers for H22 VTEC fits #68184, #68187 spring, BSeries
VTEC w/ shorter inst ht (+.060" inst ht)

 

Spring binding is just that. In this case it means the cam lobe has compressed the spring so far, and it gets squished down so much, that the space between the coils goes away. The coils have "bottomed out." Very very bad since there is now infinite spring pressure and the cam can NOT compress it further... broken cam shaft.

Clear?

 

so does anyone have a idea where I'm to measure this at ?

VTEC w/ shorter inst ht (+.060" inst ht)

 

I don't know where you measure, but just make sure you have the 87093D retainers. These retainers are needed for the B16A head (PR3, P30). I was told by my mechanic the springs with 87093 retainers would bind up. I had to return the 87093's to Crower. What a pain in the ****.

 

The cam specs should list valve lift (separate from cam lift). The spring specs should show bind height, or you can measure it. Simply compress the spring until it's bound, then measure the height. Compare the two specs. The valve lift must be less than the binding height.