Last week did a U turn,heard a bang and my car died. Got it towed home guess what my under drive pulley came off. How i do not know. The pin for it was gone. Tried to restart nothing would start. Had some friends come over and tried to start again heard a back fire and it almost back firing from the intake. Valves may be closed bent etc.. I have no idea. Well i am going to do a engine swap as soon as i can get an engine. going for a 2000 up engine. Luckily my 99 looks like it was a build from later down in the year, it has 2000+ knock senors, etc.. So it look like it will be a straight plug and play. This just sucks major. Going to have to swap over my cams on to the new engine.

Let you guys know what is up and how the car feels after the swap. Some have said for some reason the 2000+ engine feels better and runs a little stronger. So i will see and let you guys know.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

wow that sucks

wonder if the timing chain jumped or something , since it tossed the crank pulley


be sure to get some good carnage pics for us , and let us know what happened

Yeah keep us updated.









~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

Found and engine hopefully it will be going on next weekend. Going to have to swap the cams, etc on there when it gets done.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

good luck and keep updated.

I still don't know where this myth came from.... but all 99 and 00 engines are the same, except for the first O2 sensor on the exhaust manifold. It's one wire on 99's, and two wires on 00's.

No one has EVER been able to show proof of a so-called "early 99" that had EGR... ever. Even me, and I've humped lots of J-cars.

I know i have not known anyone with an EGR and a 99 so i am still to see one even though some say there is. The engine i am getting is out of a 2001 Grand Am 35K miles on it. I am paying a friend to do the swap. I won't be doing any work. My back and knee are hurting me so i won't ge able to work on my car and help with the work. Need to order a light weight under drive pulley.

Oh yeah the funny thing is at work i think i found the bolt for my underdrive pulley. So i guess when i made that U turn it just slipped right off.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

Not wanting to thread jack, but Ive wondered this for awhile.

My engine in my 97 had to be replaced a couple of years ago and the engine that was put in is a 2.4 from a 99 Grand Am. The guy that did it got the PCM and everything out of this Grand Am. My question is does this mean I am able to bolt on the GM SC, or do I still need to do everything needed for an older engine?


-Chris

Don't jack my threak j/k

Technically the supercharger can go on any engine. You just can't flash the computer for 95-99. You will need to do other mods to get it to work properly.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

Ok thanks for the info. especially after I jacked your post


-Chris

Well some friends are working on my car and they said that all the valves are bent. Two of my injectors look fouled.. Some dings in the pistons. I think two of the valves may be stuck in the head. So there may be damage to the head its self. The new engine goes in today. Should have the cams etc swaped in as well.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

Lenko, John Lenko wrote:I still don't know where this myth came from.... but all 99 and 00 engines are the same, except for the first O2 sensor on the exhaust manifold. It's one wire on 99's, and two wires on 00's.

No one has EVER been able to show proof of a so-called "early 99" that had EGR... ever. Even me, and I've humped lots of J-cars.

actually 99 and below cars have a 9.5:1 CR while 00-02 have 9.7:1 CR. So that could give it a very slight inrease in power and performance.


2006 Black Cobalt SS Supercharged G85
13.91@102.77

No, that change happened for the 99 year. It was the cc's in the different head.

I have the head off a 99 sitting here and it's identical to the head off my 00. Same casting number, everything. I also have a 98 head, and it's different and has different numbers.

The years are 96-98, and 99-02. We've been over this a million times now.

A ha!!

Quote:

2.4L L4 (LD9) Features & Benefits

OVERVIEW
The LD9 Twin Cam delivers power and more sophisticated technology to
entry-level buyers seeking a sporty performance kick. Small improvements for
model year 2001 add up to an overall increase in quality, reliability and
durability.

NEW OR CHANGED FOR 2001 MODEL YEAR

More Efficient Catalytic Converters

New Starter Motor

Sleeveless Coolant Sensor

New Cruise Control Module


CUSTOMER BENEFITS

BETTER CATS
The catalytic converter has the same volume as that used for model year
1999-2000. Yet improved technology allows the converter to work as
efficiently with less precious metals in the substrate, or the core of the
converter brick where the catalytic reaction begins. The new converter
reduces cost considerably and still allows the LD9 to meets National Low
Emission Vehicle (NLEV) standards.

STARTER
The new starter motor, supplied by Delco Remy America, draws less amperage
than the starter used for model year 2000, yet delivers the same cold
cranking power. That means the same starting power with less drain on the
battery. The starter is also lighter and costs less to manufacture.

SLEEVELESS COOLANT SENSOR
The coolant temperature sensor uses a plastic insulator to protect
electrical leads inside the brass housing, rather than a rubber sleeve. The
new sensor reduces the possibility of assembly rejection or shorting in
operation.

IMPROVED CRUISE CONTROL
The cruise control module has been upgraded with the latest electronic
board. The driver will notice no difference in operation, but quality,
reliability and durability are improved, and piece cost is reduced.

CONTINUING FEATURES
The LD9 received a number of improvements for model year 1999 which were
carried through to the current model year. Revisions to the composite
plastic intake manifold in 1999 improved airflow and evaporative air-fuel
mixing to improve efficiency and reduce emissions. The throttle body was
fitted with gold-plated terminals for its electrical connections to further
improve reliability and durability. Exhaust runners (which included a larger
downpipe off the manifold) were opened to a more healthy 1.75 inches over
the previous 1.5 inch as seen in the 1st gen 2.4L ( 1996-1998 )

The LD9 flywheel was revised and lightened to accommodate new Getrag
five-speed manual transaxle. For model year 1999, the latest Multec II fuel
injectors were introduced, ensuring the most precise fuel delivery possible
with a smaller, more clog-resistant injector design. The 2.4 Twin Cam began
production as the Quad Four-- Powertrain's first all-American dual-overhead
cam line four. It underwent extensive revision in 1996, when displacement
increased from 2.3 to 2.4 liters. The cam was re-profiled, and the intake
and exhaust systems were reworked to decrease engine noise. A stroke
increase, new balance shafts and hydraulic engine mounts radically improved
overall noise, vibration and harshness control over the louder 2.3L, yet the
Twin Cam kept the edgy, high-rev power delivery sporting that customers
appreciate.


LD/9 ( 1999-2k )
Displacement:
2392 cc
Compression Ratio:
9.71:1
Bore and stroke:
3.54 X 3.70

LD/9 ( 1996-1998 )
Displacement:
2392cc
Compression Ratio:
9.48:1
Bore and stroke:
3.44 X 3.98

--Marv Thomson, Total Integration Engineer, LN2/LD9.

Lenko > everyone

Hey Hey
YOu guys a jacking my thread.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

So the 96-98's had a different bore and stroke than the 99-02's. Makes me think what crank I have in the garage???

Lenko, might want to post that on RE




Jason
99 Z24

Racers Edge
Johnny Mack Turbo Systems
Engineered Performance

The engine is fixed. I will try and get some pictures. All i can say is my car feels alot better than the other engine and feels stronger than the other may be they are the same engine but who know. My engine had the flat pistons in it. So i am not sure if that means it had the lower compression

Oh yeah the engine came out of 2001 Grand AM.


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

http://www.grand-am.com/ARCHIVE/grandamcup/img/tif/cavalier.pdf

Here in some info. I think my 99 may have had the lower compression. It had flat pistons and from this article the higher compression had dished pistons


2004 Grand Prix GTP (Competition Group)
SOLD-->1999 Z24 5M-#30 to register on JBO
"You can please some of the people some of the time but you can't please all the people'
all the time

FLAT TOP MEANS LESS CC WHICH = HIGHER COMPRESSION...... unless the head was otherwise modifed (IE, head held more CCs, then compression wouldnt change.)

The bigger the DISH the piston has, the lower the compression. Another example..... pistons with a DOME have a HIGHER compression...... it all has to do with the amount of air compressed into a given amount of space. If there is less space, there is MORE pressure..... if there is more space, there is LESS pressure......




SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
W41 BOI - '78 Buick Opel Isuzu W41 Swap