502 mag valvetrain noise?
 

Boat ran fine last year and didnt make any noise.
This year i replaced all the plugs and a couple had a lil rust on them and changed the oil.
Started boat and could hear a ticking sound from the port side of the 502. I went to back of boat to see what the exhaust looked like at idle and the port side pipe had less exhaust coming out of it. The motor seemed like its firing on all cylinders, i plan on pulling valve covers off tomorrow, just was looking for some ideas of what to look for. I bought this engine from a guy and it had been sitting for 2 years. I put it in and it ran fine with the oil and plugs in he had. Plugs looked like hell when i pulled them out and oil looked pretty bad. I changed them to ac1 and royal purple that was suggested on this site. The engine is a 2000 502 and its in a velocity. Once i installed engine last year i might have ran it in driveway hooked to water for 20 mins maybe. Also this winter it might have gotten to 30 degrees where i am at twice but i drained water from plugs and out drive, and i had a heater running inside engine compartment on any night it got to 35 or so degrees

Get Rid of the Royal Purple. Its Junk

sometimes the ticking noise can be a leaky exhaust gasket.
now if the rust was really bad,it could be on the valve stems and its binding the valves up a touch.

I felt around port manifold and didnt feel any exhaust leaking. Im going to try again here in a bit

Hydraulic lifter not pumped up yet? When I replace the 502 in my old boat last year, I swear it took 45 min to get fully pumped up and quiet down on the new to me used engine.

After doing lots of research on this site, royal purple was with in the top 2 pics everytime, what do you run and why do you prefer it over royal purple.. ( just want to educate myself)

I lost big end of rods and mains on cranks. Poor upper end lube. It thins out way to much with heat. And it shot in less than 10 hours. I run Rotella T 15-40 no problems

Make sure you didn't have a spark plug work its way out a bit. Sounds like a to good to be true deal however it does happen and will make a similar sound. Just thought I'd mention it. otherwise the lifter???

Most my experience is when I start to hear a noise it doesn't end up well. Got lucky a few times with broken rocker arm studs though.

maybe that dirty oil had an additive in it to keep it quiet, hope not good luck

Funny you mention that. Now tell us why. Just want to see if it lines up with my own experience as others I know of. bosb

I'm betting on a collapsed lifter. Engine sat for 2 years...

Good possibility but I've had engines sit for 20plus years that sat in old cars that got pulled and had no issues. Pour some Lucas in if and run it for a bit. OR dump the oil and put some mobile 1 in it. I wouldn't run that oil. Not a chance. With that said though some do with excellent results.

Pull valve cover and start with a quick valve lash. You'll find it in a hurry if it's a lifter. Get that oil out of there.

I ran royal purple for several years, boats, race car, then had a engine failure in race car that could not figure out why...tech guy looked at crank, asked if we were running RP, he had seen several simular failures and all were running it. he suggested we get away from it, switched to brad penn and not looked back

Dutchboy - Corsa tips by any chance ? Iwas was working on a 502 that had a fuked up clicking sound coming from it,less exhaust out of one side.....looked in the tip as I was filling the outdrive and saw the silencer plate thing inside was totally loose.

This would be my guess. I have the same issue with my 502 mag, I heard was sounded like a lifter and took it into the shop. Turns out it was the exhaust.

Dam how is I never have these types of easy fixes. Last one I thought was an easy fix you could literally stick your hand through the oil pan and grab your CRANK. Was a rental car but still... Tic tic bang.

It's called - getting together with old friends - somebody gets bored - somebody fetches a few cases of beer and liquer - fun starts - **** brakes - night in jail - next day sucks.... Story of my life.

a little "Days of Thunder" action?

To put it mildly. Extremely costly one but priceless.

The first time I started my engine with new Hardin tips with internal flaps I thought the motor was coming apart. If that was the first I ever started the motor I would've started tearing heads off, lol. Just rubber flaps to boot.

Some of my lifters bled down over the winter it took a good five minutes of running and a few blips of the throttle to get them to shut up.

So i go to pull manifold off and there is rust in the 2 or 3 back cylinders on the port side. Got valve cover off and yay a bent pushrod! Have no idea where to go from here.

Now check for a bent Rod to match

Doesn't sound to good. I'd pull the engine before you get to far into it. Bent pushrod isn't real common unless there is something that caused it. You might end up with a bent valve also. You didn't suck anything through the carb did you? Flame aresstor stud or nut? I've seen them bend from excessive play from collapsed lifter and or wiped out cam lobe. Or from broken rocker arm stud in which case pushrod slaps up and down causing it to bend.

Now your water or reversion issue. Whole new problem. With what you have going on I'd start pulling now rather than having this that and the other thing all over in the bilge etc. you've got some investigating ahead. Keep us posted.

Ck exhaust manifold ports ports just to see if you did spit something through the engine. Not just the cylinder with bent pishrod as its very common to transfer around to other ports through intake.

if the piston made contact with the exhaust valve it can easily suck water in on the intake stroke.don,t ask me how i know that but i have first hand info on that.

Took the words right out of my mouth. Alot of times this goes hand in hand.

I'm assuming you made no other changes correct? No cam change or heads milled? Piston to valve clearance? Also ck your installed spring height on the problem one compared to a couple others. Ck Underside of spring retainer to top of valve guide clearance. It takes a lot to bend a pushrod so there is definitely a concern but not the end of the world. Stock rockers or roller rockers? Inspect very carefully. Maybe swap out with another pushrod just to roll engine over by hand and look over very closely and also keep an eye on the mating valve. Remove spring if your able and see if you can rotate valve as well as up and down what your able to. Make sure and keep some air pressure through your spark plug hole. I'd be surprised if you didn't have a bent valve. With your water or reversion issue is it possible it hydrolock that bent the pushrod? A rod though??? Possible but.... Either way looks like your in for the long haul and find out soon enough.

I didn't recall if engine was stock or not so just throwing these out there anyway.

i have seen rods get bent from hydraulicing a cylinder but i have not seen that bend a pushrod but i guess it could happen.

Maybe the lifter collapsed and jumped off the rocker

The engine is bone stock. There was water puddled in the bottom of manifold. So im sure it, water was in cylinder. Im just not sure how water got in there like that unless it was left over from last year.