knocking

moosenuk17 · April 22nd, 2008, 08:48 PM

started my car a couple days ago and there is a knock. it only knocks when the engine is cold. help me out?

pa.ulB · April 22nd, 2008, 08:50 PM

maybe a bearing???? , check your oil level

00redgt · April 22nd, 2008, 09:35 PM

could be dry starts

Trick Tuners · April 23rd, 2008, 12:07 PM

Is it a knock, or piston rattle? Check out my link on detonation.
Detonation Explained

the real shocker · April 23rd, 2008, 12:25 PM

Originally Posted by Trick Tuners

Is it a knock, or piston rattle? Check out my link on detonation.
Detonation Explained

wouldnt his car be throwing a code from the knock sensors if it was knocking?

00silvergt · April 23rd, 2008, 02:17 PM

it is my understand that our cars do not have knock sensors

StangAddiction · April 23rd, 2008, 02:43 PM

They don't....so no...it wouldnt unfortunately...

the real shocker · April 23rd, 2008, 03:07 PM

Originally Posted by 00silvergt

it is my understand that our cars do not have knock sensors

interesting.... learn something new everyday

B0B · April 23rd, 2008, 04:17 PM

mine does it when its cold too. pretty sure its a rod bearing

sstang · April 23rd, 2008, 06:53 PM

mine does it too for about 5 seconds after its been sitting for over a day or so.

superbeef1000 · April 23rd, 2008, 08:50 PM

I Have the same problem for some time now and it has gotten worse over time i have read some articals about bearing life and how oil escaping the bearings and pump during time that the engine is off sounds like worn out bearings to me

2kGT · April 23rd, 2008, 09:27 PM

Doubt its rod bearings.....mine still does that on cold startups and its got new bearings in it.

moosenuk17 · April 23rd, 2008, 10:23 PM

i thought it was my bearings also but didnt know for sure just wanted to get some input. thanks.

superbeef1000 · April 24th, 2008, 11:32 AM

Originally Posted by 2kGT

Doubt its rod bearings.....mine still does that on cold startups and its got new bearings in it.

sorry but that is not normal,, well depends on how long it takes for pressure to pump up but it should be near intsant

workinprogress · April 24th, 2008, 05:09 PM

after sitting for a few days, it could be rockers or just dry parts in the top end...that is much more common with a pushrod motor but still possible with us. and i agree that oil psi should be up almost instant

MATT02GT · April 24th, 2008, 08:12 PM

what wieght oil do you run?

superbeef1000 · April 25th, 2008, 10:39 AM

i run 5-20w moble synthetic

2kGT · April 25th, 2008, 12:17 PM

Originally Posted by superbeef1000

sorry but that is not normal,, well depends on how long it takes for pressure to pump up but it should be near intsant

didnt say it was normal cheif....just that I doubt he has a bad rod bearing.

suprajay79 · April 25th, 2008, 01:15 PM

I thnk my car might be having some sort of detonation problem- when I have the rpms low (around a grand) and get on it in fifth, it starts sounding like that- like a diesel, and ugly as hell. I'm due for an oil change, so it might be something in the valvetrain- I'm gonna keep an eye on this thread.

Trick Tuners · April 25th, 2008, 01:19 PM

Originally Posted by suprajay79

I thnk my car might be having some sort of detonation problem- when I have the rpms low (around a grand) and get on it in fifth, it starts sounding like that- like a diesel, and ugly as hell. I'm due for an oil change, so it might be something in the valvetrain- I'm gonna keep an eye on this thread.

You should use the LW to back out 2-4* timing in the low load region. NEVER let it detonate!!!!! Also lugging 5th at such low rpms is not a good thing to do. Just downshift.

April 22nd, 2008, 08:48 PM	#1
moosenuk17 MM Fanatic 2000 ford mustang GT Join Date: Apr 2008 Location: san diego CA Posts: 4,014 iTrader: 0 reviews	knocking started my car a couple days ago and there is a knock. it only knocks when the engine is cold. help me out?

April 22nd, 2008, 08:50 PM	#2
pa.ulB Regular 2004 GT slow.... Join Date: Nov 2006 Location: PA Posts: 415 iTrader: 0 reviews	maybe a bearing???? , check your oil level __________________ 2004 Crimson red GT saleen s/c, full bolt ons

April 22nd, 2008, 09:35 PM	#3
00redgt MM Fanatic 2000 mustang gt Join Date: Oct 2007 Location: vansant,va Posts: 4,073 iTrader: 5 reviews	could be dry starts __________________

April 23rd, 2008, 12:07 PM	#4
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,471 iTrader: 3 reviews	Is it a knock, or piston rattle? Check out my link on detonation. Detonation Explained __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

April 23rd, 2008, 02:17 PM	#6
00silvergt Regular 2000 Mustang Gt Join Date: Jun 2006 Location: Pennsylvania Posts: 428 iTrader: 0 reviews	it is my understand that our cars do not have knock sensors __________________ Tuned by Joe at Tricktuners.com

April 23rd, 2008, 02:43 PM	#7
StangAddiction Enthusiast 2000 Mustang GT Join Date: Jan 2007 Location: Virginia Beach Posts: 986 iTrader: 0 reviews	They don't....so no...it wouldnt unfortunately...

April 23rd, 2008, 04:17 PM	#9
B0B Boost gets you laid 2001 Mustang GT 12.93@113.7 (on the 18's) Join Date: Dec 2006 Location: Milton, WA Posts: 2,601 iTrader: 2 reviews	mine does it when its cold too. pretty sure its a rod bearing __________________ '01 GT. Just a couple Bolt-ons. 0rwhp 0rwtq. Epic Turbo build in progress 2003 Rubicon (wheelin rig) 2008 Silverado 4x4 (towin rig/road queen) 2009 KTM 450 XC-W (Brap Brap!)

April 23rd, 2008, 06:53 PM	#10
sstang Regular Join Date: Jul 2007 Posts: 171 iTrader: 0 reviews	mine does it too for about 5 seconds after its been sitting for over a day or so.

April 23rd, 2008, 08:50 PM	#11
superbeef1000 Hardcore Enthusiast Join Date: Aug 2006 Location: mesa , arizona Posts: 1,475 iTrader: 2 reviews	I Have the same problem for some time now and it has gotten worse over time i have read some articals about bearing life and how oil escaping the bearings and pump during time that the engine is off sounds like worn out bearings to me __________________ a bunch of stuff to make my car faster http://www.moddedmustangs.com/forums...e-member-1497/

April 23rd, 2008, 09:27 PM	#12
2kGT Enthusiast Join Date: Oct 2007 Location: Upstate SC Posts: 922 iTrader: 0 reviews	Doubt its rod bearings.....mine still does that on cold startups and its got new bearings in it. __________________ Accufab 75mm tb & plenum MRT h-pipe Flowmaster catback FRPP king cobra clutch FRPP aluminum driveshaft FRPP 4.10 gear TA Perfromance girdle Steeda tri-ax shifter Moser 31 spline axles FRPP C Springs

April 23rd, 2008, 10:23 PM	#13
moosenuk17 MM Fanatic 2000 ford mustang GT Join Date: Apr 2008 Location: san diego CA Posts: 4,014 iTrader: 0 reviews	i thought it was my bearings also but didnt know for sure just wanted to get some input. thanks.

April 24th, 2008, 08:12 PM	#16
MATT02GT MM Fanatic Join Date: May 2007 Location: Colo. Springs, CO Posts: 3,694 iTrader: 0 reviews	what wieght oil do you run? __________________ Its not how fast you drive, but how you drive fast. 2002 Mustang GT... Just The Usual Bolt-Ons Bolt on list in Garage..

April 25th, 2008, 10:39 AM	#17
superbeef1000 Hardcore Enthusiast Join Date: Aug 2006 Location: mesa , arizona Posts: 1,475 iTrader: 2 reviews	i run 5-20w moble synthetic __________________ a bunch of stuff to make my car faster http://www.moddedmustangs.com/forums...e-member-1497/

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