Everything is breaking at once!

[Joe 1320]

What kind of oil do you run in it? You might want to try dumping some SeaFoam in the oil and letting that get into the lifters and help them clean themselves out.

I'm not a fan of that. I guess I don't like the idea of stuff getting broke loose via solvents. What I've done in the past is several oil changes within a couple hundred miles and that seems to do a decent job of cleaning out an engine.

[fastTa]

I always suspected you were a sick puppy, this confirms it.


Now here's something really wierd.......... I started up the 94 again to trace the noise. It started right up, tapped for a couple of seconds and returned to normal. Nothing I could do to make the noise reappear. Test drove it, she ran just fine. I'm not going to knock it. Best guess is a lifter was sticking.

Could be a loose rocker arm.

[Joe 1320]

Drove it to work and around town for a total of 55 miles and no problems.

[fastTa]

Drove it to work and around town for a total of 55 miles and no problems.

If a rocker arm is just slightly loose, you may only hear it at startup before the lifter gets pumped up. Could also be a lifter that is starting to collapse.

It wouldn't hurt to pull the valve covers and just re-adjust all 16 rockers. Quick and easy insurance.

[Joe 1320]

If a rocker arm is just slightly loose, you may only hear it at startup before the lifter gets pumped up. Could also be a lifter that is starting to collapse.

It wouldn't hurt to pull the valve covers and just re-adjust all 16 rockers. Quick and easy insurance.

At first, that's what I thought it was. On the first startup, I grabbed my old faithful 1/2 breaker bar and used it as a stethescope. It was indeed from the top end on the passenger side. I just shut it off to mess with it later in the day. When I got around to it, I started it again and the tap was as before. I brought the revs up and the tap increased in speed but not intensity. I came back to idle, the tap disappeared. Since then I've driven it daily, put about 140 miles on it, various multi-start trips and no sign of any problem either cold or hot. No valvetrain noise, it runs flawless. I'm curious what I'll find when I pull the rocker covers. I'm almost afraid.