[Z06] Engine replaced in Z06
Thread Starter
Intermediate
Joined: Aug 2002
Posts: 43
Likes: 0
From: Texas
Engine replaced in Z06
I have a 2002 Z06 with 13000 miles and 2 weeks ago the engine died while I was driving on the HWY @ 70 - 80 mph.
I had it towed back to the dealer and they take it apart and discover the pin in the end of the cam has come out and the bolts connecting the cam to the timing chain sprocket have sheared off. Had several bent pushrods, bent valves, and 1 broken valve, the head on the #3 exhaust valve broke off and was stuck sideways in the piston.
I got the car back today with a new engine. Everything seems OK with the new engine, but I plan on taking it easy for the first 500 miles, so I haven't got on it yet to know if the power is any different then the old engine.
The part number for the replacement engine they used is 89017349
I have tried doing a web search on this part number, but haven't found anything. Does anyone know anything about this part number? It is a LS6, right? I know there has been a few minor improvement since 2002, is this part number an exact replacement, or does it have any improvements?
Thanks for any information.
Clint
I had it towed back to the dealer and they take it apart and discover the pin in the end of the cam has come out and the bolts connecting the cam to the timing chain sprocket have sheared off. Had several bent pushrods, bent valves, and 1 broken valve, the head on the #3 exhaust valve broke off and was stuck sideways in the piston.
I got the car back today with a new engine. Everything seems OK with the new engine, but I plan on taking it easy for the first 500 miles, so I haven't got on it yet to know if the power is any different then the old engine.
The part number for the replacement engine they used is 89017349
I have tried doing a web search on this part number, but haven't found anything. Does anyone know anything about this part number? It is a LS6, right? I know there has been a few minor improvement since 2002, is this part number an exact replacement, or does it have any improvements?
Thanks for any information.
Clint
Race Director
Joined: Dec 1999
Posts: 11,799
Likes: 10
From: Houston Texas
St. Jude Donor '08
Re: Engine replaced in Z06 (02 batmobile)
Clint, that sounds scary!! Now I'm concerned about my 2002 Z06 doing the same....anyone heard of this happening before? 
Pro
Joined: Oct 2000
Posts: 666
Likes: 0
From: Oviedo FL
Re: Engine replaced in Z06 (clintw)
Here's what gmpartsdirect has to say about that part number. Not real descriptive.
GM PART # 89017349
CATEGORY: All
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $8,686.50
OUR PRICE: $5,201.50
DESCRIPTION: ENGINE
GM PART # 89017349
CATEGORY: All
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $8,686.50
OUR PRICE: $5,201.50
DESCRIPTION: ENGINE
Instructor
Joined: Mar 2004
Posts: 179
Likes: 0
From: Sunnyvale Ca
Re: Engine replaced in Z06 (clintw)
I threw a valve on my '02 with 22,000 on it. I had been noticing what I thought sounded like a weak valve spring and sure enough it broke and...well you know what happened from there! The valve stem got pushed out the exaust and lodged in the opening to the right cat! The local dealer didn't bat an eye...they ordered a new motor from Michigan and had it in within two weeks. It does give rise to concern as I'm obviously not the only one that has had this type of problem with an '02. Glad your dealer was so helpful!
Steve
Steve
Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
Re: Engine replaced in Z06
That just makes me cringe thinking about having a dealership service department changing out an entire engine. I keep thinking about all the bolts they would forget or torque incorrectly. Not to mention paint scratches. I've had such bad experiences with minor repairs from service departments that I can't image letting them do a major job like this on my car. I hope everyone that has stuff like this done actually looks at their car carefully, don't take the dealerships word that things are done right. I get up and in my car everytime before I leave a dealership....and sure enough without fail, I find stuff not finished. But with warranty repairs what are we to do.
Thread Starter
Intermediate
Joined: Aug 2002
Posts: 43
Likes: 0
From: Texas
Re: Engine replaced in Z06 (Shylor)
I certainly agree with your concerns about dealers doing repair work. The vette broke down less then 1000 yards from a large Chevy dealer and I had the car towed to a dealer that I trusted 40 miles away.
Also, I want to give a big thanks to a fellow Corvette enthusiast that stopped and offered assistance, I didn’t get his name, but he was driving a nice C3.
Also, I want to give a big thanks to a fellow Corvette enthusiast that stopped and offered assistance, I didn’t get his name, but he was driving a nice C3.
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Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Re: Engine replaced in Z06 (clintw)
I bought a LS6 crate motor last July when mine had a seized rod bearing during a practice session.
My understanding is they come off the assembly line and turn some into crate motors. Mine had been built in Dec 02, os it was definitely an 03 motor. It came with a build date sheet on it.
You should be fine.
My understanding is they come off the assembly line and turn some into crate motors. Mine had been built in Dec 02, os it was definitely an 03 motor. It came with a build date sheet on it.
You should be fine.
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Re: Engine replaced in Z06 (clintw)
This one had a build date of Dec 2003. It was a complete engine missing all accessories (no intake).
Pro
Joined: May 2004
Posts: 744
Likes: 0
From: St. Peters MO.
Re: Engine replaced in Z06 (Subdriver)
When I looked into a cam for my 2003 Z06 the shop told me that achange of the stock springs,rockers ,push rods and the cam retainer bolts was agood idea even before a cam swap. The reason being poor quality of the GM parts.
Safety Car
Joined: May 1999
Posts: 3,651
Likes: 5
From: Atlantis
Cruise-In I Veteran
Re: Engine replaced in Z06 (GOOSE JR.)
When I looked into a cam for my 2003 Z06 the shop told me that achange of the stock springs,rockers ,push rods and the cam retainer bolts was agood idea even before a cam swap. The reason being poor quality of the GM parts.
So all of us with stock Vettes are driving around with junky,inferior parts in our engines?
Instructor
Joined: May 2003
Posts: 113
Likes: 0
From: Houston TX
Re: Engine replaced in Z06 (clintw)
Don't worry...it should have improvements on it! I have a 01 Z and had the entire engine replaced with a 03 engine due to oil comsumption problems and never had the problem again. It runs 10 times better than it did and it's nice to have a brand new engine and tranny with plate, clutch and all with the 03 parts @ 28,000 miles. So you shouldn't have any problems.
Intermediate
Joined: Feb 2002
Posts: 25
Likes: 0
From: Berlin
Re: Engine replaced in Z06 (clintw)
I had basically the same problem on my 2002 Z06 at around 15,000 mi. Some of the timing chain to cam bolts were sheared and the remaining bolts were loose. They found a sheared pin and metal shavings in the oil pan, the cylinder walls were scared, etc. The replaced the engine and I did not have any problems since; however the new engine never felt quite as strong as the orginal on did before it died.
