piston slap

MIREALTOR · November 14, 2003

check out this link it is in todays detroit free press -pretty interesting

http://www.freep.com/money/autonews/knock1...14_20031114.htm

ToeJam · November 14, 2003

Great article...anyone that has piston slap should print this out and keep it on file.

...And don't accept the extended warranty offer from GM!

BlackSilver · November 15, 2003

Maybe I got piston slap, maybe I don't, and I don't care either way! Hear that diesel snort!!!

MCourson · November 15, 2003

Maybe I got piston slap, maybe I don't, and I don't care either way! Hear that diesel snort!!!

tmf6902 · November 15, 2003

I thought some people with 8.1's were hearing it also??? I could be wrong though.

Shotgun · November 15, 2003

You guys may not have piston slap but you will be changing defective injectors at about 40 to 70K from what I am hearing from my neighbor...service manager at the local GMC dealer.

GMC2500HDCC · November 15, 2003

Mine slaps, Sounds like a dmax when cold. Sounds like loose lifters. Not sure to trade it next summer or start litigation. I love the truck. I overlooked the noise but with all the hipe I might need to act on it. I drive about 1000 mile a week for work with some idle time as well. The truck exhaust sounds good and the truck never lacks power. I have the 75000 mile warranty so I'm good to there. I have over 40 on it now. No oil usage and have used mobil one since new. Only sounds bad when cold and only for a short time at start-up. Any Ideas on course of action?

422 SS · November 15, 2003

You guys may not have piston slap but you will be changing defective injectors at about 40 to 70K from what I am hearing from my neighbor...service manager at the local GMC dealer.

I don't think they will fail but if so they're covered under the 100,000 mile warranty.

Shotgun · November 15, 2003

Everytime I ask he always says they have been changing them out on a regular basis..I don't know whats up with that...He also says the local farmers are really disappointed with them. And guys don't shoot the messanger here....I am just posting some firsthand info I thought you may want to know about.

k1500chevy97 · November 16, 2003

all i gotta say is some knock and its unacceptable.

As a current happy gm owner i would not buy a vortec V8. I would either buy a V6 again or the Dmax. I sure wouldnt take the gamble or to be stuck with a POS slapper.

odoh · November 16, 2003

Quote: You guys may not have piston slap but you will be changing defective injectors at about 40 to 70K from what I am hearing from my neighbor...service manager at the local GMC dealer.

Present conclusion is less than clean fuel w/less than adequate OEM filtration. Many of us have added additional filtration and expect that will forestall any premature wear of injectors. They are of Bosch design and as you know its the type system used by all three manufacturers. 'IF' there is a design deficiency (which I doubt as Bosch been making them for a long while) I expect it would be resolved before most of us reach the 100,000 mark. However, like said earlier ~ indications are that dirty fuel along w/inadequate filtration are the contributing factors for injector failures so far.

422 SS · November 16, 2003

Shotgun do you know if the farmers are using off-road fuel?If so that is probably the source of problems for them.Odoh I just changed the factory filter on my 18,000 mile Dmax and it looked great compared to all of the pics I have seen of various diesel specific sites.I buy fuel from 2 place that sell huge amounts of fuel and avoid the small low volume stations like the plague when traveling.I really don't want to add additional filters,I may just switch to the Baldwin filters for more peace of mind.

Shotgun · November 16, 2003

I wouldn't doubt that fuel has something to do with it.He told me he has been sending the bad ones to GM because they want to look into it.

gcope63 · November 16, 2003

Shotgun,

Sorry to change the subject, just a quick question.. What kind of Alpine equipment do you have in your truck and how was it to interface with the factory stereo??

Thanks

Gary