1284 Alpine Street Suite A

Cornelius, Oregon 97113

PH: 503-357-0334

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Customer Feedback

"Hello dennis you rebuilt my 350 back in june and so far it's been so great to me and performs like a charm! I went by your old shop to show you my truck but they told me you had moved. I wish you great success and thanks again!"

Gutierrez Jorge

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Bearing Fatigue


Plated Copper Lead Bearing Failure

 

 

 

 

Type: Plated Copper Lead

Distressed upper connecting rod bearing caused by engine lugging.

 

 

 

 

 

 

Aluminum Main Bearing Failure

 

 

 

Type: Aluminum

Lining fatique due to excessive loading.

 

 

 

 

 

Plated Copper Lead Main Bearing Failure

 

 

Type: Plated Copper Lead

Overplate fatigue due to excessive loading.

 

 

 

 

 

 

Plated Copper Lead Main Bearing Failure

 

 

Type: Plated Copper Lead

A bent connecting rod led to the destress in the "V" pattern observed.

 

 

 

 

 

 

 

Bearing Seizure



Plated Copper Lead Main Bearing Failure

 

 

Type: Plated Copper Lead

Seizure due to excess tension of accessory drive belt. Debris from upper is embedded in lower bearing.


 

 

 

 

Plated Copper Lead Main Bearing Failure

 

 

Type: Plated Copper Lead

These bearings exhibit damage resulting from raised metal around the crank oil hole. Crankshaft is wiping material from the center of the bearing. No lubrication is present between the crankshaft and bearing in that area.


 

 

 

 

Aluminum Main Bearing Failure

 

 

Type: Aluminum

Seizure resulting from lack of lubrication. Note lining worn, exposing steel backing.

 

 

 

 

 

Bearing Wear


Excess Main Bearing Wear

 

 

Type: Plated Copper Lead

Polished and oil-stained backs are a result of a poor fit in the housing.



 

 

 

 

Excess Main Bearing Wear

 

 

Type: Plated Copper Lead

Poor crankshaft finish exposed copper matrix.
Acid in lube oil resulted in corrosion.
Porous matrix resulted in lining fatique.





 

 

Excess Main Bearing Wear

 

 

Type: Plated Copper Lead

Rear thrust face worn to steel backing due to excessive thrust load and poor crankshaft finish.


 

 

 

 

Excess Main Bearing Wear

 

 

Type: Plated Copper Lead

Wear due to poor crankshaft finish which wore through overplate and nickel barrier to copper matrix.



 

 

 

 

 

Excess Main Bearing Wear

 

 

Type: Plated Copper Lead

Bearing worn through overplate and nickel barrier due to tapered journal.
Corrosion of lead phase resulted in lining fatique.
Copper lead matrix was exposed to corrosive acids in lube oil.