Michigan between 5/10/2010-5/31/2010.
10-14-2010, 01:28 PM
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Year: 1996
Model: Cherokee
Engine: 4.0 upgraded
Michigan between 5/10/2010-5/31/2010.
PIP4835: Engine Noise And/Or Low Oil Pressure After Oil Change In SE Michigan - (Sep 30, 2010)
Subject: Engine Noise and/or Low Oil Pressure After Oil Change in SE Michigan
Models: All GM Vehicles with a Gasoline Engine that have had the oil changed at an aftermarket oil change facility in Southeast Michigan between 5/10/2010-5/31/2010.
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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may complain of an engine noise and/or oil pressure light/message that started happening within 2,000 miles of having their engine oil changed at an aftermarket oil change facility in Southeast Michigan between 5/10/2010-5/31/2010.
This may be the result of the rubberized crankcase contamination described below.
A local oil distributor company delivered machining/cutting oil to aftermarket quick lube oil change companies in 8 cities (11 locations) in Southeast Michigan between 5/10/2010-5/31/2010 instead of engine oil. This machining/cutting oil will eventually breakdown and turn into the rubberized crankcase contamination shown below.
The distributor contacted the affected facilities around June 2010, who were supposed to contact the affected customers so they could return to have their engine flushed and oil changed but in some cases, this did not happen.
The insurance carrier currently estimates that a total of 3000 vehicles may be involved.
Recommendation/Instructions:
If this concern is suspected, review the customer's oil change receipts. If they indicate that the oil was changed at an aftermarket oil change facility in Southeast Michigan between 5/10/2010-5/31/2010, proceed with the rest of this PI.
Inspect the engine oil dipstick for any sign of rubberized contamination that leaves residue on your fingers that wipes off. This rubberized material should not be confused with sludge (stains your fingers and is soft and wet or hard, black and fluffy) or lack of maintenance.
If present, inspect the inside of the engine (oil pan or valve spring area of cylinder head) for rubberized material that can be scraped off of flat parts with a fingernail but is impossible to remove from the oil galleys. Normally, there will be a thick coating in the bottom of the oil pan (up to 2" thick) that is hard to tear apart.
Subject: Engine Noise and/or Low Oil Pressure After Oil Change in SE Michigan
Models: All GM Vehicles with a Gasoline Engine that have had the oil changed at an aftermarket oil change facility in Southeast Michigan between 5/10/2010-5/31/2010.
--------------------------------------------------------------------------------
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may complain of an engine noise and/or oil pressure light/message that started happening within 2,000 miles of having their engine oil changed at an aftermarket oil change facility in Southeast Michigan between 5/10/2010-5/31/2010.
This may be the result of the rubberized crankcase contamination described below.
A local oil distributor company delivered machining/cutting oil to aftermarket quick lube oil change companies in 8 cities (11 locations) in Southeast Michigan between 5/10/2010-5/31/2010 instead of engine oil. This machining/cutting oil will eventually breakdown and turn into the rubberized crankcase contamination shown below.
The distributor contacted the affected facilities around June 2010, who were supposed to contact the affected customers so they could return to have their engine flushed and oil changed but in some cases, this did not happen.
The insurance carrier currently estimates that a total of 3000 vehicles may be involved.
Recommendation/Instructions:
If this concern is suspected, review the customer's oil change receipts. If they indicate that the oil was changed at an aftermarket oil change facility in Southeast Michigan between 5/10/2010-5/31/2010, proceed with the rest of this PI.
Inspect the engine oil dipstick for any sign of rubberized contamination that leaves residue on your fingers that wipes off. This rubberized material should not be confused with sludge (stains your fingers and is soft and wet or hard, black and fluffy) or lack of maintenance.
If present, inspect the inside of the engine (oil pan or valve spring area of cylinder head) for rubberized material that can be scraped off of flat parts with a fingernail but is impossible to remove from the oil galleys. Normally, there will be a thick coating in the bottom of the oil pan (up to 2" thick) that is hard to tear apart.
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