| Suzuki Engine >> CON ROD CAUTION ON 1989-96 1.6L VIN O |
Connecting Rod Caution On
1989-96 Suzuki 1.6L VIN O Engines
The AERA Technical Committee offers the following information regarding a connecting rod caution on 1989-96 Suzuki 1.6L VIN O engines. It has been reported there are two styles of connecting rods used in these engines. One
uses a locked piston pin design and the other uses a full floating design. Using the incorrect rod for your application may lead to engine failure.
Apparently, engines were manufactured first for an interference fit between the connecting rod small end bore and their piston pin, thus locking the pin to the rod. That design evolved to a full floating design and the piston pin is maintained in the piston by clips.
The confusion started at the time the full floating assembly was introduced, as the rod did not incorporate a piston pin bushing. The pin is allowed to float within the small-end housing bore. It appears the manufacturing process only increased the small end diameter to create the desired clearances. All other aspects of the connecting rod remained similar.
Using a full floating rod on a locked style piston may cause an engine failure. Using a locked style rod on a full floating style piston may also cause an engine failure.
Some aftermarket piston suppliers are supplying only the full floating piston design. Some engine builders are using only that style piston and machining all 1.6L connecting rods to small end housing bore of .7481-.7485 (19.002-
19.012 mm). The desired piston pin to connecting rod small end housing bore oil clearance is .0001-.0005 (.0025-.0127 mm).
The AERA Technical Committee
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