Engine rattling

[I.N.C'SPIRIT]

I am a new dodge turbo owner, and when i got my car back from the shop, they did not hook up my wastegate, and i was wondering why i was running 15+ pounds of boost, while my car was on steroids on wouldnt run it too hard but when i would stomp on it i would hear a rattling sound after i passed 11 psi. ( im guessing that is detonation????) well after i hooked the wastegate, my boost gauge read 4 psi, but then the control arm got disconnected, but thats easy,

my problem now is, when i punch it with NO boost, im hearing a bit of rattling on top end ( 5000rpm ) what is that????

[I.N.C'SPIRIT]

help

[altered7151]

Its possible it might just be lifter noise. I hate to say it but it also might be something more serious, you may have possibly damaged something when you were running over 15psi. Best thing to do is to do a compression test and see if any of your cylinders have low compression, If you do, you may have possibly cracked a piston. If not you may just have lifter tick or who knows what, these engines tend to be a little noisy.

[turbovanman]

Was it rattling before your 15 psi boost sessions?

[lametec]

Could be you cracked a piston, and now it's letting oil into the chamber causing detonation.

[Dave Sigman]

do a compression test. pronto

[bmxrider]

try different gas, my dad uses 87 and it goes away, anything 87+ it'll rattle. btw, what you got under your hood? james

[Timmay2]

Quote:

Originally Posted by bmxrider try different gas, my dad uses 87 and it goes away, anything 87+ it'll rattle. btw, what you got under your hood? james

that depends on a few aspects of the car, such as timing and spark plug gap. fuel/spark knock can be irritating if you drift from stock numbers too much.

[bmxrider]

well, the car runs like a charm, but i hear it rattles. say as you come up a hill on 3rd gear and your applying a little bit more gas, it'll start to hear the rattle in the block\head. somewhere in there, not really sure how it rattles and what causes it to. i just got into TD so im expecting to learn from others. james

[lametec]

What you're hearing is detonation. Increased load causes higher cylinder pressures, which causes higher temperatures, which in turn causes detonation (which in turn causes broken pistons).

Check ignition timing, and make sure you're running a high octane gas (premium, mid-grade at the very least).

[puppet]

This could be a rod noise too. I think if there is too much sideways clearance on the big end the rod slaps against the crank, causing a rattle at certain rpm's.

[turbovanman]

Seen as he hasn't been back on, it could be his cam, some heads are bloody noisey, I went thru 3 of them to get a quite one! He could be hearing that and assumed it was because of his overboost!

[I.N.C'SPIRIT]

i believe it is because of my overboost, because now that i lowered the boost, i dont hear it no more.

thank you, but now i want to raise the boost, and dont know how to do it safley.

[turbovanman]

Quote:

Originally Posted by I.N.C'SPIRIT i believe it is because of my overboost, because now that i lowered the boost, i dont hear it no more. thank you, but now i want to raise the boost, and dont know how to do it safley.

See www.thedodgegarage.com and run higher octane gas!

[I.N.C'SPIRIT]

My brother told me to run sunoco 94, or else the motor may detonate....but that shit aint cheap!!