need help: engine "Tapping Sound" on 360 coupe

A few years ago I also had a "tapping" sound eminating from the motor, but on a 355. After a very close eximination it ended up being an exhaust leak. I would of sworn it was some sort of valve/ tappet noise. Try using the old mechanic trick, a short piece of garden hose, or other tubing, to help pinpoint the source.

 

Take it back to the guys who did the 30k service immediately. Who knows what the problem is, but if it's going up and down with the revs, probably something that isn't going to fix itself.

Art

 

I have had vehicles that made the tapping sound, and ended up being a noisy fuel injector. Exhaust leaks often are louder when cold, and quiet down a little when hot, due to the expansion of the metal. See if it is loud again when it is cold. If not, see if it is coming from an injector.

 

I can't believe I am going to help Jimmy but.....


It sounds like the Alternator/AC belt is a little loose. When the motor gets hot, the engine expands taking up the slack.

Your option is to have FoBH jack it, remove the undertry and move the pully to take up the slack.

 

Ah could it be the Italian tune up to the rescue?
Carbon could of built up on the valves this could cause the valve lash to become quite large. I would think that the hydraulic lifters would take up this lash but who knows. If the lash is too big it could cause ticking.It sounds like that a bit of strong repetitive mashing on the gas peddle could of burnt of the collected carbon around the valves,returning them to their proper lash tolerance.
my 02
David

 

How can anyone improve upon that classic "Italian Tuneup?!"

 

Thats a pretty gutsy move...



-A

 

thats really weird

 

Most probably a hydraulic lifter noise (if it's not an exhaust manifold).

Ask which engine oil is used, and maybe try changing it for a thinner/thicker type.. depending on conditions.

 

^ Agree...lifter, exhaust or belt....
Either way I'd swing by the place that did the service and let them know.

 

That is usually what I would think of if I heard a tapping noise. Could happen when oil passages get partially blocked due to sludge or too heavy oil weight.
Also could be that the oil is too light and isn't properly coating the valvetrain.

Anyway, first thing to do is make sure your oil level is all topped off.

 

that's the poor soul of the engine tapping on your rear glass saying "uuuuuse me! uuuuuuuse me!"

heh, could be any of the above... i just had tapping coming from my poxy fiat and it turned out to be the exhaust valve seats had come loose somehow so my mind is on that....

 

Jimmy,

It's the oil...either the level or a breakdown in the viscosity.

I'd change it. What are you running? The Maranello likes 5-40 the best.

 

"appears to be normal". In the absence of having this checked out by a trained tech (who probably won't be able to hear a noise that isn't being made anymore) have the oil changed and the oil filter cut open with s device that won't produce filings like a saw would (a pipe cutter would probably work or you can just peel the metal away once you've punctured it) Check the filter element for any traces of metal. Any shiny pieces of metal are an indication you have a problem developing. If you don't find any metal - button it up and keep driving it.

 

I would.... It shouldn't have broken down so fast.

BTW, save your money and put in Mobil1!!!

 

It had to be lifters Jimmy. Glad to see you did some nice good old fashioned "tuning" on the 360 and resolved the issue.

 

If you learned about the "dirt in the filter clearing itself out" from your mechanic, look for another one.