Enginetech B3.8K-4 is a full engine gasket set for 2005-2008 Buick and Pontiac 3.8L 231ci V6 OHV applications (2nd design lower set where noted).
Important Notes:
- 2nd. design lower set with block casting # 12585793. Use new head bolts. Kit contains (1) head set, (1) lower set & (1) plenum set
- Use new head bolts. Kit contains (1) head set, (1) lower set & (1) plenum set
| Attribute | Value |
|---|
| Part Number | B3.8K-4 |
| Gasket Set Type | Full Gasket Set |
| Engine | 3.8L 231ci V6 OHV / 5.3L V8 (select) |
| Year Range | 2005-2008 |
| Makes | Buick, Pontiac |
| Country of Origin | PE |
| Weight | 7.25 lbs |
| UPC | 707473835695 |
Fitment: 2005 Buick LeSabre/Park Avenue, 2005 Pontiac Bonneville, 2006-2008 Buick Lucerne, 2006-2008 Pontiac Grand Prix (select 5.3L).
Enginetech full gasket sets are engineered to meet or exceed OEM specifications and backed by over 40 years of engine rebuilding expertise - giving professional rebuilders and serious DIYers confidence that every seal, gasket, and component in the kit will perform correctly from initial startup through long-term operation. Each set is application-specific, designed around the exact engine family it serves, with premium materials selected to handle the thermal cycling, pressure, and chemical exposure demands of that particular application. Select sets feature Multi-Layer Steel (MLS) head gaskets for superior sealing on modern engines where precision surface finish and clamping load are critical - a meaningful upgrade over standard composition gaskets in high-stress applications. Enginetech kits are clearly documented with application-specific notes covering included and excluded components, so you know exactly what you're getting before the engine is on the stand. As with any gasket set installation, always use new head bolts where specified - reusing stretch-to-yield fasteners compromises clamp load and risks head gasket failure regardless of gasket quality.
