The Honda and Acura B-Series inline-4 engines were used in many Honda and Acura applications between 1989 and 2001. Available in 1.6L, 1.7L, 1.8L and 2.0L displacements, this family of Dual Overhead Cam (DOHC) engines was the first to feature Honda’s VTEC variable valve timing system and were a higher-performing alternative to the D-series SOHC engines. These engines are reliable and are found in many vehicles that are still on the roads today, along with being a popular engine swap option for performance enthusiasts.
As with any engine, leaks can develop as time and miles go by. The oil pan gasket is a common leak found on the B series engines – unfortunately, many owners or shops may try to tighten the oil pan bolts to stop the leak.
This makes matters worse, as the oil pan on these engines have raised dimples that are stamped in the flange to prevent over compression of the gasket on the assembly line.
By tightening the bolts beyond the original torque specification, these dimples can be crushed and the oil pan sealing flange can deform, creating leak paths and will resulting in an even worse leak!
At this point, the OE-style oil pan gasket design will no longer work, because it relies on the correct formed dimples to prevent over compression of the gasket. In this case, there are two options – replace the pan at over $100, or install the new Fel-Pro PermaDryPlus oil pan gasket – OS 30630 T.
FYI – Installation TipThe OE gasket does have two compression limiters molded into it – they can be found only on the transmission side of the pan. When removing the old gasket, these limiters can be left behind, stuck to the pan. If these limiters are left in place, the limiters built into the Fel-Pro gasket will stack on top of them and result in an oil leak.
Be sure to inspect and remove them when cleaning the flange!