Wesco cartridge kits are rugged, dependable and trouble-free, if correctly installed. Reasonable
care must be taken to obtain maximum life and prevent unnecessary engine downtime.
The following items must be checked carefully:
| 1. | Rocker arm pin and bushing must be free but not sloppy. Replace if worn excessively. |
| 2. | Install new rocker arm tappet pad (Cooper-Bessemer® engines only). Worn pads create extremely high frictional loads against the valve stem nut, which can cause the valve stem to break. |
| 3. | Oil cups on rocker arm should be replaced if lid is broken.
Fill with 90 wt. differential oil or equivalent. NOTE: It is very important that tappet be kept lubricated. |
| 4. | Hydraulic lifters (if applicable) must be set correctly and
operating properly - see hydraulic adjuster installation instructions. NOTE: Never attempt to adjust a hydraulic lifter with the engine running. This can cause temporary overheating which will severely damage the internal seals on the fuel injection valve cartridge. |
| 5. | Gasket seating surfaces in head: old gasket must be removed completely and surface must be smooth and free of cracks. |
| DESCRIPTION | SPRING NUMBER | FREE STANDING SPRING HEIGHT | INSTALLATION MEASUREMENTS | SPACER THICKNESS |
| GMV & GMX W/O LIFTER | P252 | 2-5/16" | 1-9/16" | 1/2" |
| GMV & GMX W/LIFTER | P252 | 2-5/16" | 1-9/16" | 5/8" |
| BA, HBA, TLA, TCV W/O LIFTER | P181 | 2-1/8" | 1-9/16" | NONE |
| BA, HBA, TLA, TCV W/LIFTER | P229 | 2-1/8" | 1-9/16" | NONE |
| HRA, RA N/S, TRA W/O LIFTER | P181 | 2-1/8" | 1-11/16" | NONE |
| HRA, RA N/S, TRA W/LIFTER | P229 | 2-1/8" | 1-11/16" | NONE |
| RA O/S W/O LIFTER | P252 | 2-5/16" | 2-1/16" | 5/8" |
| RA O/S W/LIFTER | P252 | 2-5/16" | 1-15/16" | 3/4" |
| GMWA, C, K-WESCO THDS, W/O LIFTER | P552 | 2-5/16" | *1-3/16" | 1/8" |
| GMWA, C, K-WESCO THDS, W/LIFTER | P552 | 2-5/16" | *1-3/16" | 1/4" |
| GMWA, C, K-COOPER THDS, W/O LIFTER | P552 | 2-5/16" | 1" | NONE |
| GMWA, C, K-COOPER THDS, W/LIFTER | P552 | 2-5/16" | 15/16" | NONE |
| GMXE W/O LIFTER | P252 | 2-5/16" | 1-5/16" | NONE |
| GMXE W/LIFTER | P252 | 2-5/16" | 1-5/16" | 1/8" |
| GMXD W/O LIFTER | P252 | 2-5/16" | 1-5/8" | NONE |
| GMXD W/LIFTER | P252 | 2-5/16" | 1-5/8" | 1/8" |
| GMWM W/LIFTER | P552 | 2-5/16" | 1-5/16" | 1/4" |
| GMWM W/O LIFTER | P552 | 2-5/16" | 1-5/16" | 1/8" |
| LTC O/S & N/S | P252 | 2-5/16" | 1-15/16" | NONE |
| UTC/SUTC | P252 | 2-5/16" | 1-7/16" - 1-7/8" | SPECIAL |
| KVS | KVS | 3-5/8" | 2-7/8" | NONE |