CHRIS CRAFT COMMANDER FORUM ®
.......A photo-intensive technical reference file and ongoing newsletter regarding the original fiberglass Chris Craft Commander. Our mission at this not-for-profit non-commercial web site is to "have fun and share information" for your individual personal use. Our main reference feature is the ever expanding MASTER INDEX Files which contain exhaustive photo and technical information on the Chris Craft Commander line (like these 38' Commander brochure scans) , (an awesome collection of Chris Craft 427 tuning and specification information), and a few words about how to use the information in the forum, etc. Be sure to look at the information about the 2008 Lake Erie Chris Craft Commander Rendezvous !! If you're a Commander fan, this will be an event you won't want to miss.
Port engine overheating on a 427 that has been converted from FWC to RWC
New (rebuilt) circ pump.
Pulled t-stat, tested, working fine
Pulled PRV's...good shape and working
The engine will cool if I restrict the water flow coming out of the back of the oil cooler to the PRV's with a vice grips. If I remove the vice grips, no water comes out the top of the t-stat housing and the temp rises.
Good water flow out the top of the PRV's at idle.
The impeller was supposedly replaced 1 year ago, but that was only 25-30 hours on the engine, however I am thinking there might not be enough flow although it looks like the same amount of water through the exhaust on both engines.
From the photo documentation, it looks like you need to pull the pump off the engine to get to the impeller, correct? If so, I doubt the marina changed both impellers last year for a 1 hour labor charge!!
If it's not the impeller, do I have clogged exhaust manifolds?