[Delemorte]

head gaskets(Update pg2)

I dont know if i blew one or not but im gonna be poking around there and want to know symptoms of what im looking for...


if i blew a head gasket and got oil in my water would i be guarenteed to see water in my oil? Im not smoking or anything but im tracking down a water leak and oil in the water would explain the oil i saw in my bildge. A leaky valve cover gasket or pan gasket would also explain but i want to cover all my bases while im there.

Gonna be pulling the pan this weekend. Replacing headgaskets is no biggy but did not want to do it if it was not required. When i pull that pan, if i dont see any signs of water should that eliviate any concerns I might have for my head gasket? any other things to check with out pulling the heads off?

 

[058]

Cylinder leakdown test.

 

[Delemorte]

Cylinder leakdown test.

Im lacking compressor so thats kind of hard.

 

[H20MOFO]

Im lacking compressor so thats kind of hard.

If it blew between cylinders, I would think that would show on a compression test.(2 dead holes)

 

[IMPATIENT 1]

Im lacking compressor so thats kind of hard.

you're not lacking a water hose though are ya? block off the outgoin water to the motor, pull all the plugs, hook up the water to the block and let it build as much water pressure as it can on the hose. look for water coming outta 1 of the plug holes

 

[Delemorte]

you're not lacking a water hose though are ya? block off the outgoin water to the motor, pull all the plugs, hook up the water to the block and let it build as much water pressure as it can on the hose. look for water coming outta 1 of the plug holes

Well damn.. Are you a smart mofo...

 

[Jetaholic]

Depends on where the head gasket blew. Yes, a blown head gasket can cause water in the oil, but not always. Typically if they blow between the cylinder and the lifter galley you will definitely have water in the oil.

A common place for water to get in the oil is the intake manifold gaskets where the water crossover in the intake manifold is.

 

[IMPATIENT 1]

Depends on where the head gasket blew. Yes, a blown head gasket can cause water in the oil, but not always. Typically if they blow between the cylinder and the lifter galley you will definitely have water in the oil.

A common place for water to get in the oil is the intake manifold gaskets where the water crossover in the intake manifold is.

sbc don't usually blow there lotta bolts on a sbc intake, i say its a headgasketbulb

 

[IMPATIENT 1]

Well damn.. Are you a smart mofo...

i try if i have a leak on a jetboat i can't find with air pressure, i always pressure up the coolant passages in the block with water, it usually shows me what's up.

 

[Delemorte]

and lets not foget. I have not found water in the oil. The actual question is "If i DONT find water in my oil, should i even look further at a possible head gasket failure?"

oil is leaking some where and it could just be a shitty valve gasket or pan gasket or could be something internal. Hoping not to pull the heads if not required. I dont mind doing it but dropping the jack on another head gasket and bolts pisses me off if it aint required. then again i could allways pull the engine and if i am still loosing oil after putting it back i can replace the head gaskets then with out removing the engine from the boat.eh


now if i do find water in there ill pull the heads regardless...

 

[obnoxious001]

hook up the water to the block and let it build as much water pressure as it can on the hose. look for water coming outta 1 of the plug holes

I would never run full line pressure from the hose, as it can be 80-90 lbs in some areas.

It's also unlikely that the heads gaskets would normally leak oil, since oil only drains back from the heads, nothing pressurized though the head gasket except water.

 

[Jetaholic]

and lets not foget. I have not found water in the oil. The actual question is "If i DONT find water in my oil, should i even look further at a possible head gasket failure?"

oil is leaking some where and it could just be a shitty valve gasket or pan gasket or could be something internal. Hoping not to pull the heads if not required. I dont mind doing it but dropping the jack on another head gasket and bolts pisses me off if it aint required. then again i could allways pull the engine and if i am still loosing oil after putting it back i can replace the head gaskets then with out removing the engine from the boat.eh


now if i do find water in there ill pull the heads regardless...

OK, to answer your question, no water in the oil does not mean that the head gasket can't be blown. They can blow between cylinders, or between the cylinder and the outside of the cylinder head, etc etc.

 

[H20MOFO]

I can't remember the name of it...but the other day on tv I saw a product you add to your oil. Then you run the motor, and check for leaks with a black light. Or just pull you motor out and paint it whitegrn

 

[Delemorte]

OK, to answer your question, no water in the oil does not mean that the head gasket can't be blown. They can blow between cylinders, or between the cylinder and the outside of the cylinder head, etc etc.

OK but would those two scenarios be condusive to oil in the water?

 

[obnoxious001]

OK but would those two scenarios be condusive to oil in the water?

Are you talking oil in the water in the bottom of the boat,, or oil exiting the boat with engine water?

If oil is leaving the engine via the water jackets, could be a cracked block (ask me how I know about that,, with a Merlin II block), or perhaps a problem with an oil cooler if you have one.

 

[pump squirt & BAIL!]

Maybe.... the dipstick tube???

 

[Delemorte]

Cool.. all good suggestions.. I think ive speculated enough.. Ill start pullin this engine and see what we got...

 

[IMPATIENT 1]

I would never run full line pressure from the hose, as it can be 80-90 lbs in some areas.

It's also unlikely that the heads gaskets would normally leak oil, since oil only drains back from the heads, nothing pressurized though the head gasket except water.

sure, but if they can't hold that, they were shit gaskets to begin with 90 psi would blow pcv lines apart,lol

 

[Delemorte]

sure, but if they can't hold that, they were shit gaskets to begin with

I think my house water pressure is only like 30 PSi.. However hooking up some pressure into my water jacket will tell me for sure if i got a leak in that SOB.... Ill definately be doing that. thanks guys!!

you never fail to deliver.

 

[Widetrack]

I saw this happen this year. The guy that bought my old boat ran it with a popped freeze plug and loaded the boat with water! (above crank) Then he called me asking about a block! Milkshake big time thought busted block! Turned out that water had worked it's way back into block through crank seals! Changed oil a couple times and and no milkshake! Just info. WTdevil