Cadillac Owners Forum banner

1 - 20 of 25 Posts

·
Premium Member
Joined
·
9,575 Posts
Discussion Starter #1
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...

Sal
 

·
Registered
2005 CTS-V, 1994 Infiniti Q45
Joined
·
7,658 Posts
The engine may tick for a wee while due to oil pressure building up...... I wouldnt think its something too terrible, much less something to worry about......
 

·
Registered
1991 Cadillac Brougham D'Elegance 5.7 Litre, 1994 DeVille
Joined
·
6,796 Posts
Depending on where it is sometimes an exhaust leak can make a ticking noise. Ive got that on one of my cars. If you start it with the hood open can you hear where it's coming from?
 

·
Premium Member
Joined
·
9,575 Posts
Discussion Starter #4
I'd open the hood to see but it happens so rarely... Ya know? I'm guessing it's probably nothing serious but since I plan on keeping this car for a long, long time - I just want to be sure...

Thanks, guys.. If anyone else has any thoughts, please let me know...
 

·
Premium Member
Joined
·
9,575 Posts
Discussion Starter #6
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?
 

·
Registered
04 CTSV 500rwhp, 96 FTS-V T56 previously, 95 T56 Impala SS
Joined
·
433 Posts
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?
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. :(

Take it from me, I have a broken bolt in my driver's side head. If the flanges weren't so damn thick on my headers, I'd be slightly more concerned about it. ;)
 

·
...Reloaded
'05 XLR
Joined
·
1,698 Posts
Sal Collaziano said:
But if it were that, wouldn't I hear the tapping all the time? Thanks for replying! :)
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...
 

·
Registered
Joined
·
6,471 Posts
Howard's right that a minor exhaust leak can actually be self-sealing thanks to thermal expansion. Chances are it is a lifter though if it only lasts for about 10 sec. The air pump will be on for more than 10 sec and an exhaust leak will usually last more than that too. It IS possible that it's the belt. Have you gotten an oil change yet?
 

·
Registered
Joined
·
6,471 Posts
What oil did they use? If the oil's too heavy, it will make a weak lifter take forever to pump up, especially now that the outside temps are cooling off.
 

·
Banned
Cadillac
Joined
·
16,105 Posts
I hope there wasn't a problem they were hiding with the engine, ie. you can buy that "quiet lifters" stuff in a bottle!? And when you got an oil change, it re-emerged. I would use 10w30, donesn't the owner's manual recommend this?
 

·
Registered
Joined
·
6,471 Posts
Sal Collaziano said:
5w30 synthetic.. That's pretty thin, right? I'm PRETTY sure it did this before the oil change also...
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.
 

·
Registered
Joined
·
30 Posts
Its a cracked passenger side exhaust manifold.

Trust me. I've owned more than one or two LT1 vehicles and its always the manifold.
 

·
Registered
NONE
Joined
·
10 Posts
Check your manifold bolts first. Manifold issues are common. Hopefully you only have a couple of loose bolts. Don't overtighten, torque to spec in FSM. Broken manifold bolts require PB Blaster and "special" MAGIC WORDS. If any bolts are missing use GM replacements with high temp (copper) anti seize. D.
 

·
Registered
Joined
·
11 Posts
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...

Sal
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.
Regards
Jim Knox, 96 Flt Br
 

·
Premium Member
Joined
·
9,575 Posts
Discussion Starter #19
Thanks for the replies on this.. I haven't checked anything lately. All I do know is that the colder it is, the louder it is. On warm days, it may not happen at all...
 

·
Registered
Joined
·
172 Posts
My guess is cracked exhaust manifold. Had the same sound on my impala ss. When I yanked the motor the right side exhaust was cracked. It would tick until it got warm.
 
1 - 20 of 25 Posts
Top