Antifreeze in exhaust ports

[Reming870]

Just pulled off the exhaust manifolds and discovered antifreeze in the manifold exhaust section and in the exhaust ports of the engine block.

I have tested the exhaust manifolds and there are no leaks. Liquid cooled closed system. No sea water.

Is this a sign of a blown head gasket? Will a simple compression test show if there is head gasket leak to the exhaust?

2009. 5.7 liter mpi. Closed cooling circuit.

 

[Grub54891]

Possibly..... Also a leak down test would tell you if there is a problem. You can also pressure check the block/anti freeze side of the system and see if it leaks down.
Why you removing them to begin with??

 

[Reming870]

I pulled the engine due to some wiring issues on the boat. Noticed the antifreeze when I pulled the risers off.

 

[Reming870]

What's a safe pressure to leak down test it? I would hate to make a problem that isn't there.

 

[bruceb58]

Is your manifold cooled with coolant or raw water. Could be that when you pulled the riser, it just dripped into the exhaust passage. Have you been losing any coolant?

 

[Grub54891]

With closed cooling,the cap should have a rating in it,15# or so. I go over the rating a few pounds for testing them.