fishingman220
Chief Petty Officer
- Joined
- Jun 13, 2008
- Messages
- 568
I have a 96 merc 5.7 it has center rise manifolds, well i am in the process of rebuilding the motor due to water getting into the exhaust and working its way into the cylinders. i have thru the hub exhaust, good flappers, and ran fine the last time it was out. i have a complete closed cooling system, so correct me if i am wrong, but antifreeze is in the manifolds and raw water is in the risers. so how would water get down into the maifolds and into the motor? it only got into the # 3,5,and7 cylinders. it looked like antifreeze in the cylinders, but it could have been anything cause i didnt see it untill i pulled the heads and antifreeze went everywhere. but as far as i know antifreeze wont rust stuff. any help would be greatly appreceated. i bought new manifolds, but now i thinking i didnt need them