Engine noise ?

[jbsnake]

So right when the engine comes under load, right at the beginning of acceleration, when the clutch engages, there is a sort of quick rattle, clacking sound. It's just for a split second, and usually only if it is hot outside. I have heard this sound in other vehicles before, but never my own so I was never concerned. Is it because CA only offers 91 octane and the engine was designed for 93? Maybe I need new plugs? Ideas? Thanks

 

[006]

marbles in a can sound?

 

[sleepermobile]

So right when the engine comes under load, right at the beginning of acceleration, when the clutch engages, there is a sort of quick rattle, clacking sound. It's just for a split second, and usually only if it is hot outside. I have heard this sound in other vehicles before, but never my own so I was never concerned. Is it because CA only offers 91 octane and the engine was designed for 93? Maybe I need new plugs? Ideas? Thanks

Check the timing chain and tensioner, or just the timing!!!

 

[Niteninja]

Check the timing chain and tensioner, or just the timing!!!

+1:thumbsup:

 

[jbsnake]

marbles in a can sound?

yeah kinda like that. doesn't happen too often, like i said only when it's hot outside and the engine's hot as well. i'll check timing chain tensioner and timing, but it seems like neither would cause an intermittant sound like that...

 

[006]

yeah kinda like that. doesn't happen too often, like i said only when it's hot outside and the engine's hot as well. i'll check timing chain tensioner and timing, but it seems like neither would cause an intermittant sound like that...

Sounds like a timing issue to me.

Are you running a canned tune on it? or is your car dyno tuned?

I see SCT in your sig..What do you use it for?

 

[jbsnake]

Sounds like a timing issue to me.

Are you running a canned tune on it? or is your car dyno tuned?

I see SCT in your sig..What do you use it for?

Yeah it was dyno tuned by a shop around here a couple years ago- I haven't changed anything since then but the midpipe (replaced o/r x with bassani x w/cats to get the cops off my back).

I've got some basic mechanical knowledge but I've never messed with the timing. Where do I start?