[laidflat]

i just bought this truck last week,well the day after i got it i went out to start it and for about 5 seconds it sounded like it was knocking.kinda like rocker arms needing to be adjusted. is this normal for these trucks? by the way its an 05 canyon with the i5

 

[12'SROCK]

it could be piston slap wich is common on GM vehicles or it could be a dead/sticking lifter. change the oil/filter and see if it goes away. perferably mobil 1 filter will do the trick. hope this helps

 

[brakenit]

We don't have lifters or rocker arms, we have roller followers since it's a DOHC engine.

It's hard to say, I think some have experienced piston slap like other GM engines but I've never noticed it in mine. Are you saying it went away once it warmed up? Something like this is hard to diagnose without actually hearing it in person.

 

[gbc43]

how many miles and has it been taken care of, maybe its time for a flush...
oldman

 

[echo2302]

Was the vehicle a used vehicle? Have you've checked to see if you have oil?
Thats usually one of the first things to check.

 

[12'SROCK]

We don't have lifters or rocker arms, we have roller followers since it's a DOHC engine.

It's hard to say, I think some have experienced piston slap like other GM engines but I've never noticed it in mine. Are you saying it went away once it warmed up? Something like this is hard to diagnose without actually hearing it in person.

man i keep forgeting which forum im on. my bad.....

 

[echo2302]

man i keep forgeting which forum im on. my bad.....

:lol:

 

[laidflat]

yea its used and i know nothing of its history,its gm certified but obviously that isnt saying much.it has 49,000 on the clock.once its running it goes away but if you turn it off for about 5 minutes and restart it you can hear it again.and the oil is over filled a little bit

 

[echo2302]

yea its used and i know nothing of its history,its gm certified but obviously that isnt saying much.it has 49,000 on the clock.once its running it goes away but if you turn it off for about 5 minutes and restart it you can hear it again.and the oil is over filled a little bit

:shrug:

Take it to the dealer if its GM cert. Thats pretty much all you can do. Like brakenit said its hard to know what it is w/ out seeing the vehicle in person.

 

[laidflat]

i just dropped ot off today to have it looked at and the steering shaft.i can feel it popping.i was just seeing if you guys have had the same problems.

 

[echo2302]

i just dropped ot off today to have it looked at and the steering shaft.i can feel it popping.i was just seeing if you guys have had the same problems.

...nope...

 

[LOKi]

I think PRC had that problem I am not exactly sure though :shrug:

 

[echo2302]

the only problem I have are hard starts and erratic idling...and thats every now and then.

 

[laidflat]

yeah mine has a harder time starting than my bored and stroked mazda lol

 

[echo2302]

yeah mine has a harder time starting than my bored and stroked mazda lol

haha.

 

[schardbody]

yeah mine has a harder time starting than my bored and stroked mazda lol

what kind of mazda motor you got bored and stroked???


OP: if search actually works try it, i have seen a handful of people say they have this problem. it could be so many things, but if it does it after sitting for 5 minutes its probably not an oiling issue, more than likely something mechanical. timing chain slack maybe.

 

[gbc43]

i just bought this truck last week,well the day after i got it i went out to start it and for about 5 seconds it sounded like it was knocking.kinda like rocker arms needing to be adjusted. is this normal for these trucks? by the way its an 05 canyon with the i5

did you drive the truck before you gave them the cash ? did you check all the fluids and smeel them ? what did you do when you got it home ? first thing you do is put fi cleaner in the tank . second is change the oil filter and date it . you might even put 1 qt of kerosine and run it for 2 hrs . now change it again . did you look in the overflow tank and should it be flushed ?
old man

 

[laidflat]

the motor is a ford 351 bored and stroked to a 393 all of that in a body dropped mazda