Last post on Dec 10, 2013 at 12:34 PM
You are in the Chevrolet Colorado and GMC Canyon
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Chevrolet Colorado, GMC Canyon, Engine, Truck
#121 of 717 any Colorado cylinder head replacement veterans out there that can offer so
Jun 22, 2007 (7:17 am)
My '06 I4 4x4 has 6800 miles on it. I've had it about 8 months. It's going into the shop next week for new valves and cylinder head. It seems from this and other forums that there's allot of I4's and I5's having this cylinder misfire problem. Iím hearing it has something to do with inferior valve seats and that the replacement cylinder heads have hardened seats. Can't believe GM is still having such serious quality control problems.
I asked GM for an extension on the drive train warranty and they pretty much told me to pound salt. So now I'm hoping to hear from those of you who've put some mileage on their truck after having the cylinder head and valve replacement done. Is it time to trade this thing in and cut my losses or should I stick it out?
Are there any Colorado cylinder head replacement veterans out there that can offer some long term reviews?
#122 of 717 Re: any Colorado cylinder head replacement veterans out there that can offer so [nogmfan]
Jun 22, 2007 (2:29 pm)
I don't know if I would call it long term review, but mine was done about 6000 miles ago and it seems to be fine. I think it still idles better than when it was new. I haven't notices any strange vibrations or power loss.
I would say keep it until the 36,000 mile warranty is close at hand. If the truck hasn't had any more problems up to that point, it will probably be okay.
#123 of 717 Re: any Colorado cylinder head replacement veterans out there that can offer so [tm4]
Jun 23, 2007 (6:06 am)
A crystal ball would be good to have right about now.
#124 of 717 Four Cylinder?
Aug 04, 2007 (7:34 pm)
Does the four cylinder engine exhibit the same forementioned problems with the cylider heads as the five cylinder? Just curious as I recently purchased a Colorado with the 2.8L four cylinder. Thanks.
#125 of 717 Re: Four Cylinder? [cairn]
Aug 05, 2007 (8:56 am)
It depends on the year of the vehicle. The I-4 did have the problem, but all cylinder head/valve problems seem to have been solved with the 2007 model year
#126 of 717 Re: any Colorado cylinder head replacement veterans out there that can offer so [tm4]
Aug 15, 2007 (5:37 am)
I recently had the head replaced on my 06 Canyon due to rough idle and a mis-fire in cylinder one. I got the truck back and it's definately running better, smoother idle etc. however I drive over a very steep mountain and it has totally lost its umph in that situation. Has anyone else experienced this?
I played dumb on the phone and asked if the head replacement was a wide spread problem and the guy said no. Riiiight... I've done my research buddy!
#127 of 717 Advice on the I-5 Valve Problem
Aug 20, 2007 (5:39 am)
Luckily for me I haven't had any real serious problems with my 05 Colorado. But I just found out about this valve problem when I got a notice in the mail from GM. So I'm just starting to research the issue. Basically they are extending the warranty for this issue to 7 years (I think that is the number, I don't have the letter in front of me) or 100,000 miles.
I have about 37k miles on the truck now. The only problem I'm seeing is during cold starts the engine will misfire while cranking.
My question is should I start chasing after a dealer now to replace the heads. My gut tells me to wait and let the mileage rack up and see how it goes. But I also don't want to get stuck some place or have the truck down for an extended amount of time if the dealer has to order parts.
BTW Over the years I have definitely been a GM fan and loyal to the bow tie. I made a conscious decision to purchase the Colorado over a Toyota because it being a US built truck by a US company. Well I'm afraid this may be the last GM product for me. I also had a Bonneville with intake manifold problems (costing me $2,000) which GM hung me out to dry on....
#128 of 717 Re: Advice on the I-5 Valve Problem [gmblues]
Aug 20, 2007 (9:49 am)
What is your mileage figure? My '05 Z85 LS I5/5speed manual went from 24mpg down to about 20mpg. After the head was replaced, it is back to 24. It doesn't pull hills in 3rd 20 mph as well as it did when new. 30K now.
#129 of 717 Re: Advice on the I-5 Valve Problem [gmblues]
Aug 20, 2007 (10:54 am)
You got a notice in the mail? When did GM start handing those out? Is everyone else getting them too? So far I have not had any trouble since the head was replaced on my 06 I-5. But it would be nice peace of mind to know that the waranty has been extended.
#130 of 717 Re: Advice on the I-5 Valve Problem [tm4]
Aug 21, 2007 (4:36 am)
I got my notice yesterday. I have an '05 with 18,000 miles on it. So far, so good..........