I dont know what is this cars problem but ever since rebuilding the head, putting it back on, etc etc it has not been running properly.

A few weeks after getting it running the oil was low, the engine started making a knocking noise at 2500 rpms (and only at 2500), my mechanic cannot figure out why. Everything is how it should be and I'm getting worried.

Charles said it sounded like the catalytic converter going bad. The cat is right off the exhaust manifold and the original did fail 2 years ago and was replaced. So why would this one suddenly fail?

help

Isn't that like Consumer Reports worst rated car? Who made that one? Daewoo I think.. They make good guns though...

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

They make really good guns, and equipment too.


IMHO its time to trade it in while it still has a bit of value.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

When Top Gear reviewed the Aveo, they concluded that the only reason to buy one is if you had never tried any other cars.

__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.

Because it's a cheap rebadged Daewoo.....

__________________
1982 300GD Carmine Red (DB3535) Cabriolet Parting Out
1990 300SEL Smoke Silver (Parting out)
1991 350SDL Blackberry Metallic (481)

"The thing is Bob, its not that I'm lazy...its that I just don't care."

Less bickering more help please

I dont think that a clogged cat would cause a knock at only 2500RPM's there'd be other signs too, I'm trying to recall what happened when a cat went bad on our tahoe It was loosing power, stalling etc

__________________
hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

You could park it next to a thick concrete wall and get an old c60 work truck and squash it imbetween the two.

Do you have a borescope (sp?) ? A peek inside the motor might do wonders.

__________________
-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.

A cam timing issue can cause a rich fuel condition in the cat, hastening it's demise. Another culprit may be the upstream O2 sensor, but you would probably be getting a CEL and codes for that.

__________________
1985 380SE Blue/Blue - 230,000 miles
2012 Subaru Forester 5-speed
2005 Toyota Sienna
2004 Chrysler Sebring convertible
1999 Toyota Tacoma

Well, its apparently making a sound like " an old vw diesel" at all rpm's. I was told by my neighbor.

I'm really upset now. This week is just another crappy week. My parents don't need this, I don't as well. Why?

How low was it run on oil?

Did you ever find the stalling issue?

I suspect a major vacuum leak was causing the stalling. It could also increase oil consumption. A clogged cat is laughable, a converter with a broken matrix can and will rattle, but clogged ones glow red hot and cause a loss of power.
Knocking isnt good. I suspect the problem will rear it's ugly head shortly.


I have a lead on a 29k mile engine for $400 local to me. Finding them by you for $750's...

~Nate

__________________
95 Honda Shadow ACE 1100.
1999 Plymouth Neon Expresso. 2.4 swap, 10.5 to 1 comp, big cams. Autocross time attack vehicle!
2012 Escape, 'hunter" (5 sp 4cyl)

is it an '04 engine?.. I think after 06 they get weird.

No vacuum leaks, only line missing is a vent line off of the valve cover to the intake but that shouldn't have caused an issue.

If I can get a good engine for it, swap over the timing stuff I think that might be a good thing. But yar im just pissed I didnt somehow get the $1400 to have my mechanic do it right the first time.

Huh?

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

If it was run with low oil for a period of time, are you sure it didn't spin a bearing and it's now hammering the crank lobe into an egg shape?

__________________

1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)