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 Regular 2000 ford mustang GT havent ran her Join Date: Apr 2008 Location: san diego/lemoore CA Posts: 363	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: 413	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 Hardcore Enthusiast 2000 mustang gt Join Date: Oct 2007 Location: virginia Posts: 1,424	could be dry starts __________________ i hate horses

April 23rd, 2008, 12:07 PM	#4
Trick Tuners Authorized Vendor KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 1,124	Is it a knock, or piston rattle? Check out my link on detonation. Detonation Explained __________________ SCT Custom Tuning, JLT intakes, Aeroforce Interceptor OBDII gauges and PLX wideband products @ Trick Tuners email joe@tricktuners.com PM for super MM member deals! Super Cheap Motorsports Camera to record the Action!

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

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April 23rd, 2008, 02:43 PM	#7
StangAddiction Enthusiast 2000 Mustang GT Join Date: Jan 2007 Location: Virginia Beach Posts: 961	They don't....so no...it wouldnt unfortunately...

April 23rd, 2008, 04:17 PM	#9
B0B Hardcore Enthusiast 2001 Mustang GT the speed of smell Join Date: Dec 2006 Location: Milton, WA Posts: 1,373	mine does it when its cold too. pretty sure its a rod bearing __________________ '01 GT P-1SC 383rwhp, 380rwtq 2003 Rubicon (DD) 05 Suzuki SV650S 55mpg moddedmustang's drunk story teller www.myspace.com/jeepwheelerbob

April 23rd, 2008, 06:53 PM	#10
sstang Regular Join Date: Jul 2007 Posts: 171	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 Enthusiast Join Date: Aug 2006 Location: mesa , arizona Posts: 955	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: 611	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 Regular 2000 ford mustang GT havent ran her Join Date: Apr 2008 Location: san diego/lemoore CA Posts: 363	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 Hardcore Enthusiast Join Date: May 2007 Location: COLORADO Posts: 1,699	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

April 25th, 2008, 10:39 AM	#17
superbeef1000 Enthusiast Join Date: Aug 2006 Location: mesa , arizona Posts: 955	i run 5-20w moble synthetic __________________ a bunch of stuff to make my car faster http://www.moddedmustangs.com/forums...e-member-1497/

April 25th, 2008, 01:15 PM	#19
suprajay79 Regular 2001 Mustang GT 13.85 @ 100.5 w/3000 ft. alt.! F***ing A! Join Date: Jan 2008 Location: Mountain Home, Idaho Posts: 193	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. __________________ 2001 Mustang GT 5-Speed, Oxford White; Chrome FR500s (17x10.5 in back), Chin spoiler, 20/5% tint Mods: K&N FIPK Flowmaster Catback BBK Underdrive pulleys 3.73 Gears (not installed) Eibach Pro-Kit BBK Plenum & 70mm TB SCT Livewire 91 oct. tune

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