GM Engine DefectsGM ProblemsGM Customer ServiceFree Attorney
 

Welcome



 

Online Computer Repair
Virus Removal
Slow - Errors
24 Hour - No Appt
All USA Based
$89 - Guaranteed
(866) 932-4768 or
Chat Now

 


 

NEW!   Latest GM TSB including 2012 models!

Around 1998, GM switched from a "Select Build" method of manufacturing and/or assembling engines to a "Net Build" method, in order to save money on manufacturing and/or assembly. In the Select Build process, pistons and cylinders are matched for size and fit. GM's new "Net Build" method of manufacturing and/or assembly, in contrast, assumes all pistons will fit equally well in all cylinders and does not allow for variations in the size of engine cylinders or pistons. The pistons of slightly varying size (all within spec) are not individually matched with the cylinders of slightly varying size (all within spec).

Excessive “piston slap” occurs because an automobile manufacturer (GM) designs and/or manufactures a defective engine in which the clearance between the piston and cylinder bore is too great. Essentially, the piston moves sideways and “slaps” or “knocks” hard against the cylinder bore and causes damage to the engine pistons and cylinders, excessive smoke emissions, excessive oil consumption, carbon buildup on piston heads, decreased mileage, and a loud and obnoxious “slapping” or “knocking” noise, all of which diminishes vehicle resale value in the trade.


"...a knocking engine could lower the value of a vehicle by $4,000 to $6,000 at trade-in"
Charlie Vogelheim, executive editor for Kelley Blue Book
Detroit Free Press

"The very evidence provided by the manufacturer (GM) to indicate this condition is not a problem ultimately demonstrates that it is a problem."  
California BBB Arbitrator

1998's through 2012's with piston slap!


GM Consumers, do you have a 1999-???? GM engine that displays any of the following problems?

bullet

A loud embarrassing and annoying internal engine knock.  Many are defective due to design and manufacturing quality consistency problems.  Listen to piston slap here.

bullet

Higher than normal levels of wear related materials in oil analysis samples performed by independent laboratories.

bullet

Vertical piston and cylinder wall scuffing/scratching or scoring on the hammering (noisy) cylinders upon visual inspection.  See photos here.

bullet

Reduced combustion chamber compression on the hammering (noisy) cylinders.

bullet

Increased oil consumption.

bullet

Increased exhaust emissions.

bullet

Did GM or there agents tell you they would fix your defective vehicle in writing/and/or verbally when the phantom "New Piston" fix WAS TO arrive in the spring or summer of 2002?  GM did in fact admit it had a problem and that its engineering department was working on the fix. The fix was promised to be made to consumer’s engines in the spring or summer of 2002. As the number of slapping engines grew and the cost to repair them grew as well, GM changed its policy.



We are receiving complaints from fellow slappers who are taking their vehicle's into dealerships for piston slap.  Apparently some dealerships are saying it is 'normal' and not giving the consumer a work order, even when asked to do so.  If this happens to you be sure to keep the following information for your records:

1. Date of repair attempt
2. Time of repair attempt
3. Service writer/managers name**
4. Name of person refusing work order**
5. Service tech's name refusing to do work**
6. Any other items/notes/observations to show proof you were there

** - Write down names in front of the person.


Request
Advertising Info


 100% FREE LEMON LAW
HELP

CONNECTICUT
DELAWARE
MARYLAND
MICHIGAN
MASSACHUSETTS
NEW HAMPSHIRE
NEW JERSEY
NEW YORK
OHIO
PENNSYLVANIA
TENNESSEE
WASH., DC
WYOMING
Click State for Free Help Now

YOUR AD HERE

 

 

Attorney's  | Home |  Group Forum | Site Map | Photos & Sound | Media | What The Others Did | Actual Work Orders | How Can I Help | What is Piston Slap | What Experts Say | TSB's | GM Contacts | Important Contacts | Questions | Links | Florida Web Group | Southeast Web Group | Online Computer Repair

Site designed, maintained and hosted by the Florida Web Group, a division of the Southeast Web Group and home of Online Computer Repair

Disclaimer: This is a collection of articles, websites, and complaints from numerous consumers around the country. PistonSlap.com is provided as a public service for informational purposes only. Information on our website should not be construed as legal advice. For answers to specific questions, you may want to contact a consumer law firm listed on our site. Links included in our links section do not imply endorsement or recommendation by pistonslap.com and are only provided as a public service. Questions pertaining to this website may be sent to webmaster@pistonslap.com.