Cypresskier Posted May 17, 2012 Share Posted May 17, 2012 Has anyone had a ticking noise coming from their engine that sounds like a lifter? No miss in the engine, just noise. Runs great, etc. just noisy. 600 hours on the boat. Link to comment Share on other sites More sharing options...
Baller MJE Posted May 17, 2012 Baller Share Posted May 17, 2012 Friend's 98 developed a ticking noise last yearthat sounded like that. Turned out to be a very small leak in the exhaust manifold. Link to comment Share on other sites More sharing options...
Baller ForrestGump Posted May 17, 2012 Baller Share Posted May 17, 2012 Jeff, I've been thinking it's an exhaust leak myself when I've been in it. Link to comment Share on other sites More sharing options...
Baller liquid d Posted May 17, 2012 Baller Share Posted May 17, 2012 could also be raw waterpump Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted May 17, 2012 Baller_ Share Posted May 17, 2012 Exhaust flange at the head is a somewhat common occurrence with the small block marine motors. I have seen more with the Indmar then that of the PCM. Pretty easy to figure out just run the motor with the motor box open and investigate where the manifolds mate at the heads if it is a exhaust leak you cant miss it! Link to comment Share on other sites More sharing options...
hogexpress Posted May 17, 2012 Share Posted May 17, 2012 My PCM 5.0L has been making a ticking sound for several months, but haven't noticed any adverse affects...yet. I haven't been able to pin down the location. I don't think it is an exhaust leak or I would have noticed exhaust smell when I open the engine box. But will investigate that. The water pump was going to be my guess because it seems to be coming from the front of the motor, but was waiting until I noticed any other signs. If it is an exhaust leak what is it exactly that makes the ticking sound? Link to comment Share on other sites More sharing options...
Baller SkiJay Posted May 17, 2012 Baller Share Posted May 17, 2012 If it's an exhaust leak, the "ticking" will be a bit like a "spitting" sound with the cover up. If it sounds like metal on metal, you might want your dealer or a trusted mechanic hear it. My neighbor's boat was ticking for a few weeks with no noticable performance change, until the valve broke off and totaled the engine. Link to comment Share on other sites More sharing options...
Baller jackski Posted May 18, 2012 Baller Share Posted May 18, 2012 You can often pinpoint a leak or source of the sound by using a 3/8" or 1/2" dia tube 1.5-2 feet long as a stethoscope. Link to comment Share on other sites More sharing options...
Baller_ DW Posted May 18, 2012 Baller_ Share Posted May 18, 2012 Ticking noise sounds like either a lifter might be collapsed or collapsing, also could be a loose rocker arm. Pull valve cover to investigate, but don't run engine with cover off or you will make a mess. Feel for loose rocker arm but do it shortly after running so the lifters are pumped up. Exhaust leak is a possibility and pretty likely, look for some black soot around the exhaust manifold to cylinder head joint. Link to comment Share on other sites More sharing options...
Horton
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