On par with the problems of this year. My engine has developed a noise and I can't seem to be able to locate it. The noise is cyclic (following the rpm) what gets me is it only comes in after about a minute of operation and will stay until the engine is completly cold. The best way to describe it as a cross between a lifter tick and lower knock. I do realize this is a poor description but looking to see if anyone has had a similar issue. I really do feel that it's not internals. After poking around on the web I was able to find a few similar issues that people believed were coming from timing chain. Has anybody seen this issue or now the noise? What stumps me is it comes in after a bit of idling. Any and all advice welcomed to help me solve this issue.
It was built about 15 years ago but it only has had 1,600 miles since then. All forged lower end. This summer I pulled the engine and fixed all the leaks but replaced most gaskets as they were getting crispy. I should also mention this noise came out after a strong run.
I was also thinking leak from header pipe. Going into garage tonight to try a few fixes. Can a header leak create a knock type noise? When I replaced gaskets I used the copper gaskets and they've been nothing but trouble.
I like to disconnect the belts briefly to verify the sound is coming from the engine, not the water pump, power steering,as comp, alternator, etc. I would then pull the valve covers And Look for a damaged rocker/ spring/ rocker stud. My guess is you have a damaged lifter, but a bearing is always a possibility.
Pressure is solid it runs at 60-67 warming up and drops to 35 after about 30 min of fun. I did do a bit of poking around this weekend and found a header Leak off head. Put copper gaskets on and they did not seal. I will admit that was my fault. I'm running hooker super comps and they have increased surface area round each port to ensure a good seal. This works with fiber gaskets but NOT embossed copper. New correct gaskets will be here this week so we shall see. If it's still there I'll pull fuel pump to see if its the timing chain. Really hoping not to have to pull this motor again.
An easy way to find where an internal noise is coming from, take a long handle screwdriver and touch to different places on the engine(valve cover/oil pan, etc) and put your ear to handle. Really amplifies noises. Least give an idea which part of the engine.
I rebuilt my 1st 350 and after 1000mi the engine developed a knock. It turned out to be an rod that was"out of round". I think I would have lost the engine if I didn't pull it. Turned all the rods, put her back together and the rings seated. Engine ran for 30+ years (once in spring and then in fall).
Justin, prior to pulling my engine for the car restoration, my engine was making some noise and I could not pinpoint it. A couple of other guys tried also and they could not pinpoint it. you wouldnt really hear it until it sat at idle for a couple mins and as soon as I blip the gas pedal to bring the idle down from high idle, you coul hear it. Used one of those mech stesascops (I know not spelled correctly) and still couldnt pin point it. I thought it sounded like it was coming from the lower end and it also almost at times sounded like it had a growling sound to it. Long story short after pulling the engine, pulled the valve covers off and almost all of the rocker arms were loose, some of them I could move the push rod up and down maybe almost 1/8 inch. Just a thought man...good luck and let use know what it is.