HONDA B-SERIES ENGINES
The high-revving DOHC VTEC icons that defined an era of Japanese performance and engineering excellence. If there was a line of engines that solidified Honda's repulation for reliable highly tuneable engines, it was the B series. It first emerged in 1988 (in the Japanese market) and ultimately ended up being used in no less than 8 different vehicles in its life span. Bomb proof as long as you didn't break the timing belt.Â
CORE SPECIFICATIONS
Displacement
1.6L - 2.1L
Valvetrain
DOHC VTEC
Induction
NA
Redline
6.8k - 8.4k
Power Band
5.5k - 8k
KEY ENGINES & SPECS
B16A (SiR-II)
Bore
81.0 mm
Stroke
Compression
77.4 mm
10.4:1
Factory Power
Factory Torque
170 PS
157 Nm
Redline
8,200 RPM
B18B1 (Integra LS)
Bore
81.0 mm
Stroke
Compression
87.2 mm
9.4:1
Factory Power
Factory Torque
140 hp
124 lb-ft
Redline
6,800 RPM
B18C5 (ITR)
Bore
81.0 mm
Stroke
Compression
87.2 mm
10.6:1
Factory Power
Factory Torque
195 hp
130 lb-ft
Redline
8,400 RPM
B20B (CR-V)
Bore
84.0 mm
Stroke
Compression
89.0 mm
9.2:1
Factory Power
Factory Torque
126 hp
133 lb-ft
Redline
6,300 RPM
COMMON B-SERIES PROBLEMS
This technical breakdown of B-Series vulnerabilitiesÂ
Oil Pan Gasket Seepage
The traditional rubber gaskets tend to harden over time, leading to persistent leaks at the rear of the pan due to heat cycling.
Impact: Generally more an ALLOWANCEÂ rather than a true weak spot assuming you are keeping an eye on your oil. usually replacement of the oil pan gasket is a relatively straight forward affair in most configurations.Â
Valve cover gasket
Internal distributor seals commonly fail, allowing engine oil into the housing which fouls the ignition rotor and igniter.
Impact: Sudden stalling; service life of OEM units is typically 120k miles. super easy replacement. Compared to weak spots many other engines have, this one is hardly worth mentioning but we wanted to be complete in our review.Â
VTEC Solenoid Screen Clogging
Debris from infrequent oil changes accumulates in the precision screen, preventing VTEC engagement and causing high-RPM power loss.
Impact: Impaired performance; requires cleaning every 80k miles for peak health.
Valve Seat Wear
In high-mileage (250k+) or heavily tracked engines, the intake valve seats can recede, causing compression loss and rough idle.
Impact: Gradual power decline; manageable through regular valve adjustments. This engine does not have HYDRAULICÂ lifters that can compensate for valve seat wear so checking and adjusting the valves PERIODICALLY is essential. Fortunately this task is easily done with the screw in adjusters.