EL 1.6L ENGINE

The EK1 (or EK) 1.8l engine was manufactured by Honda Motor Company between 1979-1983 for the 1st generation Honda Accord, 1st generation Honda Prelude, 1st generation Honda Vigor and early 2nd generation Honda Accord models. Introduced new for the 1979 model year, it replaced the standard EF 1.6L in US Accords. It was a water cooled, SOHC 12-Valve CVCC engine with a displacement of 1.8L (1751CC). Output varied as the engine went through two updates during it's production. Most notably was the introduction of the CVCC-II emission setup in late 1980 models. The EK 1.8l engine was standard in Japanese and US Markets. All other markets worldwide had standard the EL 1.6L engine. Transmission choices were an automatic 2spd/3spd or manual 5 speed.

Minor engine issues are known to occur, especially the cylinder head warping, causing a blown head gasket. The immense heat generated from the combined exhaust/intake setup could not exchange fast enough to the iron block, resulting in warpage. Honda tired to remedy this with an updated cylinder revision to help dissipate the heat, which lowered temps dramatically. Clogged CVCC valves and incorrect wear on the oil pump gear are also issues to look for.

Overview

• Displacement 1.6 L (1,602 cc)
• Inline four cylinder, transverse
• Cast iron block & aluminum silicon alloy cylinder head
• Redline limit - 6,000 RPM
• Two barrel Keihin Carburetor w/ manual choke
• Electronic Ignition
• Belt driven timing gear
• Liquid Cooled - Thermostat controlled fan
• Electric Fuel Pump
• Oil Cooler (or provision on the block)
• HF-3 = Automatic / HF-5 = Manual

Engine Block

Cast iron block with integrated water pump insert and large oil passages. Three versions exist (689, PB2 PC1) with additional manufacturing refinements and accessory bolt holes. Blocks are identical for both manual and auto trans per there version. They essentially the same as the EK 1.8l blocks, but with minor changes.

Specs

• 77mm bore x 86mm stroke (3.031 in × 3.386 in)

(676-1) 1979 - 1980 Non-CVCC Cylinder Head

Eight port cylinder head (4 intake ports / 2 exhaust ports) for 1979-1980 models.

• CDM/EDM EL-1000001~ Prelude (1979)
• CDM/EDM EL-1200001~ Prelude (1980)
• CDM/EDM EL-1300001~ Prelude (1981)

Specs

• 8:4:1 Compression
• 73.5 HP @ 5000 RPM
• 90 ft lb Torque @ 3000 RPM
• Intake valve diameter (34mm), Exhaust valve diameter (28mm).

Engine Weight w/ Trans

• 5spd -
• Auto -

676-1 Cam Profile

Three camshaft profiles were used on the manual/auto for these years.

• EL-1000001~ 14110-676-640
• EL-1200001~ 14110-676-641
  • AUX IN CAM HEIGHT -
  • MAIN IN CAM HEIGHT -
  • MAIN EX CAM HEIGHT -

• EL-1300001~ 5SPD 14110-676-600
  • AUX IN CAM HEIGHT -
  • MAIN IN CAM HEIGHT -
  • MAIN EX CAM HEIGHT -

• EL-1300001~ HMT 14110-676-740
  • AUX IN CAM HEIGHT -
  • MAIN IN CAM HEIGHT -
  • MAIN EX CAM HEIGHT -

(676-2) 1981 Non-CVCC Cylinder Head

Eight port cylinder head (4 intake ports / 2 exhaust ports) for 1981 models. Same as 676-1 but with 1mm larger intake valves (35mm)

• CDM/EDM EL-1300001~ Prelude (1981)

File:81ELCYLINDERHEADLAYOUT.jpg

Specs

• 8:4:1 Compression
• 75 HP @ 5000 RPM
• 90 ft lb Torque @ 3500 RPM
• Intake valve diameter (35mm), Exhaust valve diameter (28mm).

Engine Weight w/ Trans

• 5spd -
• Auto -

676-2 Cam Profile

Three camshaft profiles were used on the manual/auto for these years.

• EL-1300001~ 5SPD 14110-676-600
  • AUX IN CAM HEIGHT -
  • MAIN IN CAM HEIGHT -
  • MAIN EX CAM HEIGHT -

• EL-1300001~ HMT 14110-676-740
  • AUX IN CAM HEIGHT -
  • MAIN IN CAM HEIGHT -
  • MAIN EX CAM HEIGHT -

(PC3) 1982 - 1983 Non-CVCC Cylinder Head

Eight port cylinder head (4 intake ports / 4 exhaust ports) for 82-83 Honda models. Intake valve diameter increased by 1mm (35mm), Exhaust valve diameter increased by 2mm (30mm).

• CDM/EDM EL-1400001~ Prelude (1982)

Specs

• 8:8:1 Compression
• 80 HP @ 5000 RPM
• 93 ft lb Torque @ 3500 RPM
• Intake valve diameter (36mm), Exhaust valve diameter (30mm).

Engine Weight w/ Trans

• 5spd -
• Auto -

PC3 Cam Profile

CAM# 12251-PC1-000

• • AUX IN CAM HEIGHT -
  • MAIN IN CAM HEIGHT -
  • MAIN EX CAM HEIGHT -