I asume "CFHD" means carbon fibre, high-definition something, but what? :-)
Last night I replaced the CCV, along with oil dipstick o-ring, throttle body gasket, and cleaned the throttle body and IACV. What a PITA! Removing all the parts to get to the CCV was just lots of work, but the hoses were stuck on, and the release rings are hard to reach, and getting the new manifold hose in place (the one that twists on) was really, really hard. Once that was on, it was just work putting everything back together, but I was tired and made some mistakes.
- Dropped 3 bolts/nuts, one bit and a wrench into engine bay, plus dropped a light 3 times. Fished wrench out with magnetic pick-up, light with hands, but had to remove plastic undertray to get other pieces back.
- Forgot to unclip fuel purge valve from its hanger until after struggling with removing old CCV for a while.
- Put new VC tube on backwards (upside down)! Disconnecting it from DISA was very difficult, at least 25 extra minutes wasted on that, before putting it back on right-way up.
- Forgot to install cabin air filter last night. Noticed is sitting in garage this morning.
After all that work, I didn't find anything obviously wrong with the old DISA. No broken hoses--except what I broke on the ends removing them. No oil leaks. No clogged drain tube or dip stick. The insulation on the old intake manifold equalizer tube was very brittle and broke up, but not the tube itself. I guess I could have waited on the CCV for a while longer.