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Post by bacon100 on Jul 23, 2008 5:36:56 GMT
Hi i wonder if any one has any idea? my boat has a aq130 motor it is raw water cooled it has a new impeller and thermostat.It will run fine up to 2500rpm over that it starts to get hot can any one help PS I have cleaned out the oil cooler holes thanks. Darrell
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Post by michael1923 on Jul 23, 2008 10:36:11 GMT
Take the thermostat out and try,or check the new thermostat. I know it's new but could be faulty.
Otherwise not really sure
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Post by Dave.S on Jul 24, 2008 23:08:00 GMT
Hi Darrell Whilst checking the thermostat, see if you can see any build up of salt corrosion. As it is raw water cooled you may have to run some SaltX around the engine to help clear some of the waterways. Also check the hoses to see if any are collapsing internally. Do you have a raw water filter? Is it blocked or partly blocked? Water intake is this clear? It is worth checking the simple things first. Good luck Dave  |
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Post by bacon100 on Jul 25, 2008 17:02:03 GMT
Hi thanks alot for your help, I have cleaned out the manifold walls and found some rust and salt build up around one off the inlet pipes so hopfull that should do it now. Dave s it did not have a strainer/filter on the raw water side so I have now fitted one thanks again .
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Post by BrianR on Jul 25, 2008 17:50:25 GMT
Have you fitted the correct thermostat, as it's raw water cooled it should be about 54 degrees C?
The correct thermostat for a raw water cooled volvo is double acting, when the thermostat opens, the top bit closes the bypass. If the bypass isn't closed off there will be no circulation through the engine and it will overheat. You can't run without a thermostat for the same reason.
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Post by bacon100 on Jul 28, 2008 7:43:26 GMT
Thanks for that Brian I will check that as well. I know volvo like to charge alot for everything on that motor now,I have bought a cheap raw water strainer that says it can take 120LPM but when I bring the rpm up it starts to empty. Iam running a 5/8 sea Cock do you think that should be able to provide enough flow.thanks for your help Darrell.
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Post by BrianR on Jul 28, 2008 18:13:57 GMT
Darrell
I would have thought 5/8 would be ok. Mine is done with 15mm copper.
Mine's an AQ110 which is an earlier 1.8 litre version of yours.
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Post by bacon100 on Aug 1, 2008 6:15:05 GMT
Hi again one more thing, do any of you know what temp the aq130 should run at as I am going to fit a new gauge with up to 110degrees on it. The one on my boat now just says normal and now runs around the A or L of the word,thanks again Darrell
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Post by BrianR on Aug 1, 2008 12:21:17 GMT
As it's raw water cooled it should run at about 54 o C, any hotter and the salt in the water will cause problems. That's why I asked if you had the correct thermostat. Just checked the owners manual for the AQ130, it is 54 o C. The owners manual is HERE it's a large file so will take a while to download. |
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Post by bacon100 on Aug 4, 2008 15:41:06 GMT
thanks again Brian ,now its to ruff to get out to test it .I will let you know how it goes. looks like the spare motor in my garage will be geting a rebuild over the winter,do you no anyone thats not to dear??
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Post by BrianR on Aug 4, 2008 16:48:09 GMT
Where are you located?
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Post by bacon100 on Aug 5, 2008 11:33:38 GMT
sorry mate christchurch
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Post by BrianR on Aug 5, 2008 18:14:33 GMT
I had my AQ110 rebored, and the head converted to unleaded at Magnum Engines on the Nuffield Estate at Poole.
I've just been back and had a Ford 2litre SHOC (Pinto) head converted to unleaded and the exhaust valves refaced, cost £143.35.
Their phone number is: 01202 683328
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