It may be a cracked exhaust manifold. It's a VERY common trouble on the LT1's. Also, make sure all the bolts are still in the exhaust manifolds. It's common for them to back out, but usually they just break.Sal Collaziano said:I don't think it's a lifter..
Come on, now.. We've got a ton of LT1 Fleetwood guys here and I'd like to get more input.. Anybody?
That *might* be true, but on the other hand, as the metal heats up it expands. A small leak might actually close up enough to get rid of the noise. And the exhaust side does heat up pretty fast...Sal Collaziano said:But if it were that, wouldn't I hear the tapping all the time? Thanks for replying!
That's the same oil I use. Maybe 10w-30 dino would be better in some ways but what Sal's using probably isn't a factor in the ticking noise. Any decent mechanic should be able to ID the source of the noise as soon as he hears it.Sal Collaziano said:5w30 synthetic.. That's pretty thin, right? I'm PRETTY sure it did this before the oil change also...
Hey Sal, have you checked the running engine in the dark to see if there might be an ignition short that clears up once the compartment is hot - no dampness.Sal Collaziano said:Okay. This doesn't happen most of the time - but once in awhile I hear a moderate tick from my engine for the first 10 seconds or so of driving.. What could this be and why would it happen?
Thanks in advance...