scoflaw
Well-Known Member
- Aug 10, 2011
- 6,395
- Boat Info
- 1999 Powerquest legend 260 sx 502 mag
2005 Baja 242 islander 496
- Engines
- 502 mpi Bravo 1
496 mag B1
Won't be down for a few more weeks, I like the extension idea.
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Here's some entertainment....Won't be down for a few more weeks, I like the extension idea.
Maybe it's just the cheap monitor I'm on right now, or just an odd pic, but those gaskets don't look right in more than one place.Turned out I just needed a couple of taps on a screwdriver in all 4 corners, and off she came. We're making headway now.
Next is to pull the rockers, push rods and lifters to see if there's any tell-tale issues.
So far, it's just been the intake manifold bolts not torqued down as much as I thought they should be, and some obvious rust in the exhaust manifold #4. surprisingly, not much sludge either (so far). what I can see of the cam looks clean, and no scarring.
View attachment 115574
how so? Rectangular ports 454 Magnum MPI Horizon. Bolt pattern was right, but, I don't know the true history of this engine either. As loose as some of the intake bolts were, I'm thinking the top has been off before.Maybe it's just the cheap monitor I'm on right now, or just an odd pic, but those gaskets don't look right in more than one place.
1. Not my wheelhouse by any stretch, I've not found anyone who cares more than me what the end result is.Oil burner, why replace the heads and not rebuild? Is the crosshatching visible on cylinder walls? Vertical scores and shiny smooth no good.
Interestingly enough, Cylinder 5 and 6 which are both the 3rd cylinder from the front of the motor both show signs of water ingestion. There is some pitting and rusting on the valves. If you compare that to the cylinder pictures (hard to tell the exact order) the piston tops may also be cleaner. This would lend itself to some potential water ingestion (bad gasket or exhaust reverb).Valves pics same order. This stuff will be thrown away.