AQ-130C cylinder head needed

[keithmckinley]

Got a boat handed down to me and it seems the cylinder head was replaced some time ago with an auto cylinder head. as a consequence the engine AWAYS runs hot.

Looking for a crack free marine cylinder head.

contact:

keith(at)mckinley.us

 

[joe_merchant]

Might want to try a "wanted" ad on Craigslist as well as keep an eye on ebay motors. I see the 130's and parts once in awhile.

 

[haffiman37]

Check that the thermostat is in place and working.
That engine runs hot WITHOUT thermostat.

 

[hystat]

ditto.

the head isn't a probable cause of the overheating

 

[keithmckinley]

I took the thermostat out thinking it would help!! I guess I'll reinstall and get a new temp sending unit as well.

Can anyone say for sure if a Volvo B-20 automobile head will work on a volvo aq-130 (b-20) marine engine? Is there a water jacket issue between the block and the head??

 

[keithmckinley]

ditto.

the head isn't a probable cause of the overheating

I have checked EVERYTHING else....except the sending unit

 

[eastcoastitalian]

Sometimes you will have to also open the expansion tank and take the core out and back flush it with some good water pressure, also if your running an oil cooler??they sometimes get a bunch of **** clogged up in them, i had the same problem on my bb140 and could'nt figure it out for the longest time, but it was just poor circulation.

 

[boatdoc55]

His 130C is raw water cooled. I have a head if needed.

 

[tailsscales]

Another thing to check in the way of circulation is the water neck (?) on the top of the leg. I know on mine it was all corroded and pitted real bad and it leaked allowing air to sneek in. They are easily found on Ebay for relatively cheap.

 

[ssmsm]

auto b20 head will not work. The auto head has ports for the water pump on a car and the marine application does not. that is the most obvious difference. put a clear hose in the area of before your pump to see if you are sucking air. also like others said put thermostat in and see. good luck

 

[el_pescador]

auto b20 head will not work. The auto head has ports for the water pump on a car and the marine application does not. that is the most obvious difference. put a clear hose in the area of before your pump to see if you are sucking air. also like others said put thermostat in and see. good luck

Automotive heads for the B20 can be marinized.

http://www.marineengine.com/boat-forum/showthread.php?t=250552

http://www.alaska4x4network.com/showthread.php?t=37838

 

[keithmckinley]

Thanks for the input...I have gone through every aspect of the cooling system and NOTHING is clogged. The only issue is the possibility that the cylinder head is incorrect and the fact the thermostat is out...