2009 Corvette LS7 block coolant engine exchange head knack leak lifter noise oil piston

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Filed Under (Chevrolet) by admin on 15-04-2011

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Subject: Models: 2009 Corvette LS7 and LS9 Engine Replacement Information 2009 Chevrolet Corvette with a 6.2L (RPO LS9) or 7.0L (RPO LS7) Engine in the United States of America The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition/Concern: This is to announce a temporary program for 2009 Z06 and ZR1 Corvettes in the U.S.A. with major engine failures. In an effort to gain product knowledge quicker, Chevrolet would like to provide the opportunity for the customer to allow their Z06 or ZR1 Corvette to be picked up by special carrier and returned to the Bowling Green Assembly Plant to have the engine exchanged. If the customer agrees, General Motors will arrange to have a complete engine sent directly to the assembly plant. A specialized repair crew will exchange the engine, complete a diagnostic review, ensure all of the codes are cleared, and run the vehicle through the final assembly check. Once completed, the vehicle will be returned to the dealership on the first available carrier. Bowling Green Assembly anticipates the entire process should be completed in approximately 10 working days. Recommendation/Instructions: If engine replacement is necessary, please review the opportunity above with the customer to see whether they would like to have your dealership replace their engine, or at Bowling Green Assembly Plant. If a Z06 customer would prefer to have your dealership replace their Z06 engine, follow the latest version of 02-07-30-029 and contact PQC before ordering the replacement engine from your parts department. If a ZR1 customer would prefer to have your dealership replace their ZR1 engine, follow the latest version of 08-06-01-014 and contact PQC the PQC and they will order the replacement engine for you as necessary.

1996 Ford Aerostar Engine – Carbon Knock On Acceleration

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Filed Under (Ford) by admin on 08-09-2010

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ENGINE – 4.0L OHV – CARBON KNOCK ON ACCELERATION NOISE – CARBON KNOCK ON ACCELERATION – VEHICLES EQUIPPED WITH 4.0L OHV ENGINE ONLY FORD: 1990-1997 AEROSTAR 1990-2000 EXPLORER, RANGER ISSUE Some vehicles equipped with the 4.0L OHV engine may exhibit an engine noise which may be perceived by the customer as a piston/connecting rod bearing knock. This carbon knock is heard only under load during the drive cycle. Carbon knock is a customer drive duty-cycle phenomenon that cannot be repaired with an engine exchange. This may be caused by carbon build-up within the combustion chamber. ACTION Verify condition. If normal diagnostics fail to correct the condition, de-carbon the combustion chamber to help quiet the carbon knock noise. Refer to the following Service Procedure for details. SERVICE PROCEDURE Use Motorcraft Carburetor Tune-up Cleaner PM-3. Carbon removal: a. Disconnect canister purge line from throttle body. b. Attach a vacuum line to the canister purge port. c. At hot engine idle, allow the engine to ingest 1/2 to 2/3 of a can of Motorcraft Carburetor Tune-up Cleaner. Use caution not to ingest too quickly due to potential hydro-lock issues. d Shut engine off and allow it to soak for one hour. e. Start engine, allow engine to ingest the remainder of the Motorcraft Carburetor Tune-up Gleaner. f. Remove vacuum line and re-install canister purge line. g. Road test vehicle at 3500 RPM for 2-3 miles. h. Repeat above procedure two times for a total of three times. i. Change oil and filter.