Posted: 8/20/2011 8:33:20 AM EDT
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Neighbor bought a 89 Bayliner 305 I/O. Didn't test drive it. So far, he has replaced the right side head gasket, Intake gasket, valve cover gasket,exhaust manifold and both side exhaust manifold gaskets. He is STILL getting water in No. 7 cylinder, oil pan and exhaust manifold. Tell me what is the problem? My guess, cracked block!
Thanks, BravoCharlie |
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The left side exhaust manifold is dry, the right side he just replaced. So, the riser or elbow on the right side could be bad? How could you do a simple test to see if it is bad? A new one is $240.00. Also, where would you get a riser/elbow checked if you can't do it yourself?
Thanks, BravoCharlie |
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whoever changed the manifold should have checked them both. anyway remove the elbow turn it upside down and look in it. at the end where it exits will be a dump hole (exit for the water) just add water to the engine side and see if it enters the exhaust section (center where ex go's through)
remove it and you will see how it works. |
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Quoted:
Sometimes a cracked elbow won't be visible inside. Pressure testing is the best way, but requires a block-off plate with air fitting. Where is he getting his prices for parts? Is this a Mercruiser engine?[/quo He is getting his parts from a local marine dealership. It is a 305 engine with outboard drive/ it is black but I think it is OMC. The dealership can't test it. We don't know where to go to get it tested. Also, he said the water comes in if he throttles the engine at high RPM's. BravoCharlie |
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Look at Osco for marine exhaust manifolds and risers (elbows). We really need to know if it's a Mercruiser or OMC. The OMC will have a plastic cover on the back of the outdrive held on with three bolts. The water pump impeller is located behind this cover.
The term "throttling the engine at high RPM's" means what exactly? Does he mean that no water gets in at idle, but at high RPM's water gets into the cylinder? |
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Quoted:
Look at Osco for marine exhaust manifolds and risers (elbows). We really need to know if it's a Mercruiser or OMC. The OMC will have a plastic cover on the back of the outdrive held on with three bolts. The water pump impeller is located behind this cover. The term "throttling the engine at high RPM's" means what exactly? Does he mean that no water gets in at idle, but at high RPM's water gets into the cylinder? It is OMC, the water pump is in a plastic housing like you described. He puts the water hose on the lower unit, at idle no water, puts engine in gear and throttles up and that's when the water shows up into the cylinder, exhaust manifold and oil pan. BravoCharlie |