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2001 z06 known engine problems?

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Old Sep 14, 2024 | 11:30 PM
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Default 2001 z06 known engine problems?

Are there many problems with this first year z06?(ls6) I've heard and even been recommended to stay away from the 01 z06? Is this a valid warning?
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Old Sep 15, 2024 | 12:46 AM
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Only if it belongs to the cop nextdoor…
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Old Sep 15, 2024 | 10:43 AM
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01 Z are not bad car but they are the least desirable of them, search google and you’ll find why.
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Old Sep 15, 2024 | 11:46 AM
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Some of the 2001 Z06's were plagued with excessive oil consumption but the majority of them were probably corrected, under warranty. Another obvious minus, to some people, is the fact they were only rated at 385hp vs 405hp for the 2002-later cars. However, GM only produced 352 C5Z's in Speedway White, that year only. Those cars are very desirable and hold their value well.
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Old Sep 15, 2024 | 11:54 AM
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Originally Posted by USAZR1
Some of the 2001 Z06's were plagued with excessive oil consumption but the majority of them were probably corrected, under warranty. Another obvious minus, to some people, is the fact they were only rated at 385hp vs 405hp for the 2002-later cars. However, GM only produced 352 C5Z's in Speedway White, that year only. Those cars are very desirable and hold their value well.
If you give me the choice between +20 horses or a white car I’ll jump on the hp and I love my black 03
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Old Sep 15, 2024 | 01:11 PM
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I've had both an '01 and an '03. Of course the 405 is more desirable, but I never had any problems with my 2001. Both were great cars and very fun to drive.
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Old Sep 15, 2024 | 01:55 PM
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Originally Posted by captain vette
If you give me the choice between +20 horses or a white car I’ll jump on the hp and I love my black 03
An extra 20hp is easy to get. SW C5Z's, not so much. My preference would be an 02 or 03 C5Z so we agree on that point.
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Old Sep 15, 2024 | 06:16 PM
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SW white for the win, if you can find one. If 385hp is not enough, your mechanically inclined, TSP CNC ported heads (or their Brawler heads) and an TSP low lift "Truck Cam Kit" (beehive springs) will get you way over that 385 rating that came from the factory, and be reliable with a good tune. SW is one of the best colors...
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Old Sep 16, 2024 | 04:56 PM
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‘01’s may not be as desirable, so you know what? That makes them cheaper. I wanted an ‘04 until my ‘01 popped up at a fantastic price. I’ll add a cam later if I want the 20hp.
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Old Sep 16, 2024 | 10:10 PM
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My 01 doesn't burn oil.
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Old Sep 17, 2024 | 06:42 AM
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My 01 either and it dodged the 03 -04 fuel crossover issues also. Each has their own quirks and depends how it was beat on.
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Old Sep 17, 2024 | 07:54 AM
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20hp is a set of headers and tune fix...

01-early 03 still had fuel pump/siphon pump at the bottom of the tanks...MUCH easier to repair if needed.
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Old Sep 17, 2024 | 06:15 PM
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Originally Posted by schaumi
‘01’s may not be as desirable, so you know what? That makes them cheaper. I wanted an ‘04 until my ‘01 popped up at a fantastic price. I’ll add a cam later if I want the 20hp.
A set of 1.8, or 1.85 ratio rockers will make the '01 cam as good as, or better than, the later 405hp cam. Get the later air filter housing, the rockers, and a good tune, and you'll easily be over 405hp....
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Old Sep 17, 2024 | 06:18 PM
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Originally Posted by grinder11
A set of 1.8, or 1.85 ratio rockers will make the '01 cam as good as, or better than, the later 405hp cam. Get the later air filter housing, the rockers, and a good tune, and you'll easily be over 405hp....
How would the 1:8 rockers work on a mild LS1? Could you keep the stock springs?
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Old Sep 17, 2024 | 06:21 PM
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Originally Posted by captain vette
01 Z are not bad car but they are the least desirable of them, search google and you’ll find why.
I don't totally agree. The '01 Zs also had the Alcoa forged aluminum wheels, which are highly sought after in the marketplace. That 20 hp can easily be evened out, and exceeded, for around $1,000....

Last edited by grinder11; Sep 17, 2024 at 06:26 PM.
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Old Sep 17, 2024 | 06:25 PM
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Originally Posted by USAZR1
How would the 1:8 rockers work on a mild LS1? Could you keep the stock springs?
AFAIK, all model years would be fine as is. EXCEPT the 2000 models. The 2000 models would need different springs. The 2000 model is an outlier in that it had the highest lift factory cam (.500") of all model years base C5s. You'll damage the engine if you keep the stock springs in a 2000 model combined with 1.8s.....
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Old Sep 17, 2024 | 07:13 PM
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Originally Posted by grinder11
A set of 1.8, or 1.85 ratio rockers will make the '01 cam as good as, or better than, the later 405hp cam. Get the later air filter housing, the rockers, and a good tune, and you'll easily be over 405hp....
Uhhhh, I have a 03Z with BTR stage 2 cam, speed density no MAF, ported Dorman LS2 intake, ported LS2 TB, LS7 air bridge/filter and full exhaust making 393/365 on a Mustang Dyno....

Mustang Dyno vs DynoJet aside, I don't see 405 at the wheels with only rockers/air bridge and tune...
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Old Sep 17, 2024 | 09:43 PM
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Originally Posted by smitty2919
Uhhhh, I have a 03Z with BTR stage 2 cam, speed density no MAF, ported Dorman LS2 intake, ported LS2 TB, LS7 air bridge/filter and full exhaust making 393/365 on a Mustang Dyno....

Mustang Dyno vs DynoJet aside, I don't see 405 at the wheels with only rockers/air bridge and tune...
I think he is comparing 405 crank hp, not rwhp.
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Old Sep 17, 2024 | 09:46 PM
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Originally Posted by Eshoremd
I think he is comparing 405 crank hp, not rwhp.
No one cares about crank HP LOL
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Old Sep 18, 2024 | 03:58 PM
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Originally Posted by smitty2919
No one cares about crank HP LOL
The 405 badge on the side of the ‘02-‘04 cars is crank HP. That’s what ‘01 haters care about.
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