GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Engine

Print

See Figures 1, 2, 3, 4 and 5

Engine identification can take place using various methods. The VIN, described earlier in this section, contains a code indentifying the engine originally installed in the vehicle. In most cases, this should be sufficient for determining the engine with which your car is currently equipped. However, some older vehicles may have had the engine replaced or changed by a previous owner. In this case, the engine can be identified by an engine serial number stamped on the block or located on adhesive labels that may be present on the valve covers.



Click image to see an enlarged view

Fig. Fig. 1: Engine number locations, engine VIN F,P,N,R,Y and K. 1975-77 Olds and Pontiac number stamped on oil filler tube.



Click image to see an enlarged view

Fig. Fig. 2: Engine VIN location, late model Olds 231 V-6.



Click image to see an enlarged view

Fig. Fig. 3: Early V-6 engine number location, 1977 shown.



Click image to see an enlarged view

Fig. Fig. 4: VIN location, 5.0L Olds 307 CID (VIN Y)



Click image to see an enlarged view

Fig. Fig. 5: Engine VIN locations, 265, 301, 305, and 350 (L-code) V-8s

 
label.common.footer.alt.autozoneLogo