koresample
New Member
- Mar 24, 2012
- 26
- Boat Info
- 1998 270DA 'Cloud 9"
7.4 MPI BIII
West Marine 260 dinghy
Lowrance HDS-5M Gen 2
Wet Sounds Electronic
- Engines
- 7.4 MPI
7.4 L MPI FWC motor in the 98 270 DA has started a mystery coolant leak. I say mystery becasue I filled the overflow to the 'cold' line and ran the boat for about 5-6 hours. After the motor cooled down (and for a couple of days) the coolant level in the overflow pretty much stayed at the same level. I checked on the boat last night and happened to see that the level is down a couple of inches now.
I don't see any coolant in the bilge or behind the motor or under the overflow bottle....any suggestions? There is no white smoke when I start the motor and I had the manifold, risers and gaskets replaced 20 hours ago. I double checked the bolts on top of the risers and they are torqued down correctly. All that would make sense if it was losing coolant when the motor was running...but when it's sitting?
I don't see any coolant in the bilge or behind the motor or under the overflow bottle....any suggestions? There is no white smoke when I start the motor and I had the manifold, risers and gaskets replaced 20 hours ago. I double checked the bolts on top of the risers and they are torqued down correctly. All that would make sense if it was losing coolant when the motor was running...but when it's sitting?