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Flushing a raw water system

D

dennis

Contributing Member
Are the water jackets in the

Are the water jackets in the block sepparated from the left and right banks possibly causing overheating in one bank?
 
" Dennis,
There may be a rest

" Dennis,
There may be a restriction caused by part of the head gasket covering a passage or you have cloggs in your water passages.
Before you tear into the engine can you give me a flow pattern into and out of the engine? I presume from previous discussions there is a "Y" connection in your hoses. Are there one or two hosses bringing water into the engine? How many hoses leave the engine. Are there any "Y"/"T" connections leaving the engine?

Eddie "
 
" The flow is from pump to fro

" The flow is from pump to front of manifolds by way of a y after the pump.Then to the gear box into the intake and out to the riser and then out the exhaust ....I Think! Thats how i have routed on both sides. I,m gonna pull the heads again and pop out the freeze plugs and flush .There has to be some sort of clogged water way on the starboard side to make it heat up that fast on one side only.I'll be qualified for a inboard pit crew when i'm done with this engine . I appreciate the feedback .keep it coming and maybe we'll stumble on a sollution. One other thing .I put new water hoses on and they are heater hoses from NAPA. they aren't as stiff as the hoses i took off .Could they be collapsing? "
 
" Dennis,
The hoses may have

" Dennis,
The hoses may have started delamanating on the inside. This is one of the reasons hoses of all kinds should be discarded in time. Stiffness is an indication of age, one of the clues. The "Y" connection is a troublesome situation because any restriction on one side will tend to channel the water to the other side as seeks a path of least resistance. That is the reason it might help to position valves/valve AFTER it leaves the engine. This creates a back pressure, similiar to a tuned exaust, that can be controlled.

Eddie "
 
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