[HO455]

I pulled this engine apart yesterday and found this. From the outside I noticed the blue goo oozing from every joint around the timing cover. Photos 1 and 2. Photo #2 has blue lines pointing to the over application of RTV. When I pulled the head photo 3 shows the RTV that was inside of the water passage. The 4th photo shows the total length of the RTV that was in the passage. It is obvious that there was little to no water flow to number one cylinder.

RTV sealant must be use with discretion. Too much can be damaging. The is a reason that manufacturers like CAT no longer use RTV sealants. They now use the more expensive Anaerobic type sealants to prevent to prevent this kind of problem.