SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: sandman on September 15, 2012, 11:41:09 AM
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:banghead: ok guys hears the deal built my motor up a couple seasons back and it has been flawless. have taken it to el cap 3 times this season with no issues but decided to make a trip to the river and started blowing oil out the breather and getting warm not hot but ran up to 180 which it never does! :screwy: so i pulled up to the sandbar and took a quick look I had oil on the driver side only coming from the valve cover breather so I just decided to enjoy the weekend get a tow, trailer it, and catch a ride with friends. now im home and pulled the plugs number one cylinder got hot but all other plugs look fine can someone help shed some opinion on this. should I tear it down? it doesnt even wanna crank over now and the motor only has like 100 hours maybe!......Mike
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:banghead: ok guys hears the deal built my motor up a couple seasons back and it has been flawless. have taken it to el cap 3 times this season with no issues but decided to make a trip to the river and started blowing oil out the breather and getting warm not hot but ran up to 180 which it never does! :screwy: so i pulled up to the sandbar and took a quick look I had oil on the driver side only coming from the valve cover breather so I just decided to enjoy the weekend get a tow, trailer it, and catch a ride with friends. now im home and pulled the plugs number one cylinder got hot but all other plugs look fine can someone help shed some opinion on this. should I tear it down? it doesnt even wanna crank over now and the motor only has like 100 hours maybe!......Mike
With all the plugs out, can you turn it over with a wrench on the balancer bolt? If not,, maybe disconnect the driveline and make sure the pump isn't causing the drag?
Maybe try draining the oil filter into a clean pan to inspect for debris. You can also pull the valve covers to look for debris.
Before I would tear an engine down, I would check and test a number of things,, a leak down test helps to let you know if valves or rings have a sealing issue. You could do a simple compression test if the engine turns over properly, but it's not as good as a leak down for indicating the condition of the engine.
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The leak down test will tell you more about what is happening inside the engine, but don't take the guage readings to serious because if you cant run it first to build some heat the leakage will be higher than normal. The main thing is to compare your readings from cylinder to cylinder to see if it can tell you if something is wrong.
You also might want to flush your cooling system to see if you picked up some trash, weeds or some other debris causing the overheat.
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i agree with the other two ^ responces! it sounds like you had somethin bad happen to the #1 cyl i would not crank it over to much before i took a really good look at the oil. if you have a lot of material i.e brass or say grey looking stuff in the oil tear it down dont bother trying to get a leak down test. good luck.
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there's a good chance that you detenated a piston ring land, happened to me a couple of times
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Thanks guys looking into it now.