Horrible Engine Noise

dogteam7

Founding Member

May 16, 1999

60

0

7

Stockbridge, GA, US

Jun 28, 2004

#1

• Jun 28, 2004

• #1

I have a 2002 GT with about 48,000 miles on it. I don't beat it and the only mod are Flowmaster 40 series. I change the oil regularly and it doesn't use oil between changes.

Well yesterday, the engine made a terrible clunking noise when started that lasted about 30 seconds. Sounded like a rod knocking. When i first heard it I shut the engine down and checked oil etc. When I started it up again it did the same thing but after about 30 seconds of idling the noise slowly faded away. The oil pressure was good(as per factory gauge)

This happened twice now after the car has sat for 2 days or so. It doesn't do it everytime it sits for a couple day.

Anybody else have this happen? What is it? Is my engine going to die?

 

~Stangzorized~

New Member

Feb 26, 2003

466

0

0

no mustang no care

Jun 29, 2004

#2

• Jun 29, 2004

• #2

warranty.

 

M

mustangrmyk

Member

Jun 7, 2004

96

0

6

So. Cal.

Jun 29, 2004

#3

• Jun 29, 2004

• #3

Check your oil filter. It sounds like the anti drain back valve is no good or the filter doesn't have one. Always use a Motorcraft filter on your Mustang. You can't go wrong with that.

What happens is the oil in the filter drains back into the pan and, when you start up, it takes a few seconds to fill it back up. You get a "dry" start up and the engine can knock.

 

XtorT'r

New Member

Jun 11, 2003

381

0

0

Minnesota, YAAA

Jun 29, 2004

#4

• Jun 29, 2004

• #4

Just a hunch... are you running the proper amout of oil? if I forget to check mine I sometimes get some type of valve chatter if the oil gets low.
Just thought I would toss that out there.

 

Skud

Member

Sep 10, 2003

493

0

17

Saskatchewan

Jun 29, 2004

#5

• Jun 29, 2004

• #5

XtorT'r said:

Just a hunch... are you running the proper amout of oil? if I forget to check mine I sometimes get some type of valve chatter if the oil gets low.
Just thought I would toss that out there.

Click to expand...

uggghhh *shiver*



Riley

 

dogteam7

Founding Member

May 16, 1999

60

0

7

Stockbridge, GA, US

Jun 29, 2004

#6

• Jun 29, 2004

• #6

Well I checked the oil and it was a little off the full mark but no where near low. The car is due for an oild change so when I do that this weekend, I'll make sure I put Motorcraft filter back on the car. Any other ideas or suggestions are welcomed. My old 5.0 never did this!

 

dogteam7

Founding Member

May 16, 1999

60

0

7

Stockbridge, GA, US

Jul 1, 2004

#7

• Jul 1, 2004

• #7

Well I changed the oil and put on a Motorcraft filter so I hope this solves the problem. I find it hard to believe but a filter and fresh oil are cheap enough to at least give it a shot. I still have to question if this is an early warning sign of a failing oil pump.

 

Aaron 4.6

Founding Member

Apr 10, 2001

2,695

0

0

Georgia

Jul 1, 2004

#8

• Jul 1, 2004

• #8

dogteam7 said:

I still have to question if this is an early warning sign of a failing oil pump.

Click to expand...

I don't think so. The oil pump is a gear pump. Typically they either work, or puke their guts.

Rod knock doesn't usually quiet down, so that doesn't sound like the issue. I do agree that this is a 100% warranty issue.

 

S

Steedaq

20+ Year Stangneter

Dec 16, 2003

88

9

18

Jul 1, 2004

#9

• Jul 1, 2004

• #9

dogteam7 said:

I have a 2002 GT with about 48,000 miles on it. I don't beat it and the only mod are Flowmaster 40 series. I change the oil regularly and it doesn't use oil between changes.

Well yesterday, the engine made a terrible clunking noise when started that lasted about 30 seconds. Sounded like a rod knocking. When i first heard it I shut the engine down and checked oil etc. When I started it up again it did the same thing but after about 30 seconds of idling the noise slowly faded away. The oil pressure was good(as per factory gauge)

This happened twice now after the car has sat for 2 days or so. It doesn't do it everytime it sits for a couple day.

Anybody else have this happen? What is it? Is my engine going to die?

Click to expand...

Dude, Yea the same thing happened to my '99 GT last weekend after it sat for 2 days (I typically drive it every day). It sounded so bad I shut if off right away and when I started it again, it sounded fine. It sounded like spark knock or something, kind of a dieseling sound, I guess. I just figured it was due to the car getting old. The car has 136K miles on it. This was the first time this has ever happened. I've always used Mobil 1 oil and filters and haven't had a problem.

 

2k3gt

New Member

Apr 20, 2003

103

0

0

York, ME

Jul 1, 2004

#10

• Jul 1, 2004

• #10

~Stangzorized~ said:

warranty.

Click to expand...

You mean the 3 year 36,000 mile warranty? He's about 12k past it...

 

M

mwarrior

Member

Feb 24, 2003

33

0

6

Nov 3, 2004

#11

• Nov 3, 2004

• #11

Well, doing a search and i found this. Anybdoy have any idea what a clunk at starting and also pressing on the throttle could be from? My sister's stuck with the car right now in MI on the way back from IL. The only mods the engine has are Underdrive Pulleys, Spacer, Steeda Springs, and CC Plates.

She started it while I was on the phone and it was quite loud (key starts, CLUNK CLUNK CLUNK CLUNK, and quiet until the gas is pressed). Any suggestions? Or mod-friendly dealers in/around Portage MI (49002)?
Gagan

 

chinostang

New Member

Oct 7, 2004

40

0

0

Sac

Nov 3, 2004

#12

• Nov 3, 2004

• #12

36000 mi huh The dealer I bought my car from held me at gun piont until I got the extended million mile POS Warranty thats prob void when it rains or the humidity gets high enough.