volvo aq170a press test

[boaterinsd]

OK, so as it goes the water in the oil continues. I have removed and cleaned the Eng oil cooler. Put on new end gaskets and resealed it. Now it still seems to leak. I am trying to figure out the best way to test the cooling system since its NOT( sorry for the typo) a closed system like a car that you can pressure test from the radiator. I was thinking to put a water hose to the intake line near the exhaust manifold near the filter. And I'd remove the filter to see if i have it coming out of the oil filter adapter. If anyone knows a better way to do this please let me know. I haven't pulled the plugs yet to ck for a head gasket problem. Could i also try putting air to the same line/ hose to ck for a leak at the filter adapter or in the Eng oil fill in the valve cover. TIA

 

[boaterinsd]

Re: volvo aq170a press test

have i got everyone stumped??? i hope not

 

[captmello]

Re: volvo aq170a press test

did you pressure check the oil cooler while it was removed?

If the system is a sealed fresh water system, then pressurize it and see if it holds. 5 - 10 psi max. See what happens...

Do you have antifreeze in the engine? or water? What is in the oil, antifreeze or water?

 

[boaterinsd]

Re: volvo aq170a press test

did you pressure check the oil cooler while it was removed?

If the system is a sealed fresh water system, then pressurize it and see if it holds. 5 - 10 psi max. See what happens...

Do you have antifreeze in the engine? or water? What is in the oil, antifreeze or water?

It's an open system, i did ck it over but with it being an open system without antifreeze i am trying to get a good way to test it. I have i am thinking water in the oil , on the dipstick it is on the very bottom of it. So i did a drain of it this weekend and did a top off of new oil. Going to look into things now, will advise.

 

[boaterinsd]

Re: volvo aq170a press test

ok, pulled all the plugs, the middle 4 look fine, the # 1, 6 and wet, fouled. I cant say if its gassy or not it isn't a milky color either. I am going to press test engine with pressure tester, or with a CLT, to get the answer i need. I am really thinking now its more than the oil cooler.

 

[captmello]

Re: volvo aq170a press test

in your first post, you said, "I am trying to figure out the best way to test the cooling system since its now a closed system like a car that you can pressure test from the radiator."

Now you say, "It's an open system, i did ck it over but with it being an open system without antifreeze i am trying to get a good way to test it."

It's one, or the other......

Did you pressure test the oil cooler or not?

 

[boaterinsd]

Re: volvo aq170a press test

in your first post, you said, "I am trying to figure out the best way to test the cooling system since its now a closed system like a car that you can pressure test from the radiator."

Now you say, "It's an open system, i did ck it over but with it being an open system without antifreeze i am trying to get a good way to test it."

It's one, or the other......




Did you pressure test the oil cooler or not?

Fixed typo in 1st post, its an open system. No i haven't cked oil cooler by pressure testing

 

[PiratePast40]

Re: volvo aq170a press test

Most any radiator repair shop can do a pressure test on it for you. The manual says to test at 14 pounds.

 

[boaterinsd]

Re: volvo aq170a press test

Most any radiator repair shop can do a pressure test on it for you. The manual says to test at 14 pounds.

Do i bother with the # 1 & 6 spark plugs being wet and fouled? And the other 4 being dry. You think i have 2 problems then?

 

[PiratePast40]

Re: volvo aq170a press test

If you have a way to pressure test the whole system, then by all means do it. More water in the oil would indicate that the oil cooler is the problem. If not the oil cooler, then, it wouldn't be unreasonable to pull the head to check for a bad head gasket or obvious cracks in the head, block, or exhaust manifold. Testing the oil cooler separately is an option if you don't have a way to pressure test the whole system.

 

[boaterinsd]

Re: volvo aq170a press test

I found last last night that the cyl head HAS to be retorqued after 20 hours. I bought this used the cly head isnt painted at all of isnt the color of the block and valve cover. Leading me to the conclusion that someone has had it apart right befroe i bought it, or about 25 hours of use ago. So tonight i am going to ck the torque on the head and then readjust the valves as per the manual. I hope to see a positive outcome. And then will go from there. But ill press test before and after, and BTW i had done a compression test this spring with good #'s.

 

[boaterinsd]

Re: volvo aq170a press test

I found last last night that the cyl head HAS to be retorqued after 20 hours. I bought this used the cly head isnt painted at all of isnt the color of the block and valve cover. Leading me to the conclusion that someone has had it apart right befroe i bought it, or about 25 hours of use ago. So tonight i am going to ck the torque on the head and then readjust the valves as per the manual. I hope to see a positive outcome. And then will go from there. But ill press test before and after, and BTW i had done a compression test this spring with good #'s.

I checked to head bolt torque tonight, all in spec. I did have the bad luck of knocking 2 push rods out of place, are these a bearcat to right??? Also is there only the 2 places for the water & oil to combide?h gasket and cooler.
puller the cooler off for proper pressure ck.

 

[boaterinsd]

Re: volvo aq170a press test

I checked to head bolt torque tonight, all in spec. I did have the bad luck of knocking 2 push rods out of place, are these a bearcat to right??? Also is there only the 2 places for the water & oil to combide?h gasket and cooler.
puller the cooler off for proper pressure ck.

oil cooler was dropped off and he did a quick ck, and it passed. hes gonna get it fully clean and reck monday. So if its good my head is gonna have to come off.

 

[PiratePast40]

Re: volvo aq170a press test

Also is there only the 2 places for the water & oil to combide?h gasket and cooler.

The other options are cracked block, head, or manifold.

 

[boaterinsd]

Re: volvo aq170a press test

The other options are cracked block, head, or manifold.

which manifold has water? both or just exhaust?

 

[PiratePast40]

Re: volvo aq170a press test

Page 35 of the manual has a really good cooling water flow diagram and explanation. A cracked exhaust manifold could explain water droplets on a few spark plugs. But realistically, if the oil cooler isn't leaking, theres a good chance you have a cracked block or head.

 

[boaterinsd]

Re: volvo aq170a press test

ill ck it out, thanks. so are you saying water can and is in contact with the exhaust in the manifold?

ok, my next item to check then will be the exhaust manifold, it thats true

 

[boaterinsd]

Re: volvo aq170a press test

ok, got the engine oil cooler back and the pressure test passed, at 29lbs. I had him make sure all was well. And now is it the exhaust manifold to pull and ck or is there no way for it to get oil milky? and the #1 & 6 plugs wet fouled? Thanks Jeff

 

[RogersJetboat454]

Re: volvo aq170a press test

It's a bit of a long shot, but another thing to consider is the condition of the shaft seals for the raw water pump. Is the raw water pump dripping at all? The pump is driven by the end of the cam shaft with a shaft that goes from the cam all the way to the cover the the raw water pump. Like I said, a real long shot, but if you find nothing else, theoretically water could be pushed from the raw water pump into the timing cover and end up in the crank case if you have some bad seals.

 

[boaterinsd]

Re: volvo aq170a press test

It's a bit of a long shot, but another thing to consider is the condition of the shaft seals for the raw water pump. Is the raw water pump dripping at all? The pump is driven by the end of the cam shaft with a shaft that goes from the cam all the way to the cover the the raw water pump. Like I said, a real long shot, but if you find nothing else, theoretically water could be pushed from the raw water pump into the timing cover and end up in the crank case if you have some bad seals.

I didnt see anything dripping from the pump,i will recheck it closer will if be to the outside if it is leaking at the seals? Also would it leak oip out if the seals were bad on it?