EL 1.6L ENGINE: Difference between revisions

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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.  
The EL 1.6l engine was manufactured by Honda Motor Company between 1979-1983 for the 1st generation Honda Accord and 1st generation Honda Prelude. It is part of the E-series of Honda engines. Introduced new for the 1979 model year, it replaced the standard EF. It was a water cooled, SOHC 8-Valve CVCC engine with a displacement of 1.6L (1602CC). Output varied as the engine went through two updates during it's production. The EL 1.6l engine was standard in Canada, Europe and Australian Markets. 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.
'''The EL series is an interference engine!'''


[[File:EK1enginestock.jpg|750px|]]
There are three variations of this cylinder head, depending on the year Honda it was offered in.
 
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. 
 
[[File:ELenginestock.jpg|750px|]]


==Overview==
==Overview==
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* Displacement 1.6 L (1,602 cc)
* Displacement 1.6 L (1,602 cc)
* Inline four cylinder, transverse
* Inline four cylinder, transverse
* 77mm bore x 86mm stroke (3.031 in × 3.386 in)
* Cast iron block & aluminum silicon alloy cylinder head
* Cast iron block & aluminum cylinder head
* Redline limit - 79-80 Models 5,800 RPM, 81-82 Models 6,000 RPM
* Redline limit - 6,000 RPM
* Two barrel Keihin Carburetor w/ manual choke
* Two barrel Keihin Carburetor w/ manual choke
* Electronic Ignition
* Electronic Ignition
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===Specs===
===Specs===


* 77mm bore x 94mm stroke (3.03 in × 3.70 in)
* 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 / 4 exhaust ports) for 1979-1980 models.
 
* CDM/EDM EL-1000001~ Prelude (1979)
* CDM/EDM EL-1200001~ Prelude (1980)
* CDM/EDM EL-1300001~ Prelude (1981)
 
[[File:79-80ELCYLINDERHEADLAYOUT.jpg|750px|]]
 
===Specs===
* 8:4:1 Compression
* 73.5 HP @ 5000 RPM
* 90 ft lb Torque @ 3000 RPM
* Redline @ 5800 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~ CAM# 14110-676-640
*EL-1200001~ CAM# 14110-676-641
**AUX IN CAM HEIGHT -
**MAIN IN CAM HEIGHT -
**MAIN EX CAM HEIGHT -
 
*EL-1300001~ 5SPD CAM# 14110-676-600
**AUX IN CAM HEIGHT -
**MAIN IN CAM HEIGHT -
**MAIN EX CAM HEIGHT -
 
*EL-1300001~ HMT CAM# 14110-676-740
**AUX IN CAM HEIGHT -
**MAIN IN CAM HEIGHT -
**MAIN EX CAM HEIGHT -
 
===Notes===


==(676-2) 1981 Non-CVCC Cylinder Head==


==1979 - 1981 CVCC Cylinder Head (676)==
Eight port cylinder head (4 intake ports / 4 exhaust ports) for 1981 models. Same as 676-1 but with 1mm larger intake valves (35mm).


Six port cylinder head (4 intake ports / 2 exhaust ports) for 1979-1981 models.
* CDM/EDM EL-1300001~ Prelude (1981)
* USDM EK1-1500001~ Prelude (1979 49 S)
* USDM EK1-1000001~ Prelude (1979 CALI)
* USDM EK1-1900001~ Prelude (1979 HI-AL)
* USDM EK1-2500001~ Prelude (1980 49 S)
* USDM EK1-2000001~ Prelude (1980 CALI Manual)
* USDM EK1-2300001~ Prelude (1980 CALI Auto)
* USDM EK1-2900001~ Prelude (1980 HI-AL)
* JDM EK-1000001~ & EK1200001~ Engines Prelude (SN100-110 Models)
*Note - 1980 California Automatic models used the newer PB2 cylinder head design only during this year for emission standards.
*Intake valve diameter (34mm), Exhaust valve diameter (28mm). Aux valve diameter (12mm).


[[File:79-80EK1CYLINDERHEADLAYOUT.jpg|750px|]]
[[File:79-80ELCYLINDERHEADLAYOUT1.jpg|750px|]]
[[File:79-80ELCYLINDERHEADLAYOUT.jpg|750px|]]


===Specs===
===Specs===
* 8:0:1 Compression
* 8:4:1 Compression
* 72 HP @ 4500 RPM  
* 75 HP @ 5000 RPM  
**68 HP @ 4500 RPM w/ Hondamatic '79 & '80 Models
* 90 ft lb Torque @ 3500 RPM  
* 94 ft lb Torque @ 3000 RPM  
* Redline @ 6000 RPM
**94 ft lb Torque @ 3500 RPM w/ Hondamatic '79 Model
* Intake valve diameter (35mm), Exhaust valve diameter (28mm).
**94 ft lb Torque @ 2500 RPM w/ Hondamatic '80 Model


===Engine Weight w/ Trans===
===Engine Weight w/ Trans===
* 5spd - 338.5lbs (153.5kg)
* 5spd -  
* Auto - 338.7lbs (153.6kg)
* Auto -  
 
===676-2 Cam Profile===
Three camshaft profiles were used on the manual/auto for these years.  
 
*EL-1300001~ 5SPD CAM# 14110-676-600
**AUX IN CAM HEIGHT -
**MAIN IN CAM HEIGHT -
**MAIN EX CAM HEIGHT -
 
*EL-1300001~ HMT CAM# 14110-676-740
**AUX IN CAM HEIGHT -
**MAIN IN CAM HEIGHT -
**MAIN EX CAM HEIGHT -


===689 Cam Profile===
===Notes===
Two camshaft profiles were used on the manual/auto for these years. NOTE - '80 CALI models used the PB2 Cam profile with newer engine.
* Casting variations show HF "A" or "B" on front, most likely representing it was for an automatic or manual setup.
*MANUAL TRANS CAM# 14110-689-000
**AUX IN CAM HEIGHT - 43.737 - 44.057MM
**MAIN IN CAM HEIGHT - 37.923 - 38.163MM
**MAIN EX CAM HEIGHT - 38.004 - 38.244MM


*AUTO TRANS CAM# 14110-689-900
==(PC3) 1982 - 1983 Non-CVCC Cylinder Head==
**AUX IN CAM HEIGHT - 43.737 - 44.057MM
 
**MAIN IN CAM HEIGHT - 37.546 - 37.786MM
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).  
**MAIN EX CAM HEIGHT - 37.628 - 37.868MM
 
* CDM/EDM EL-1400001~ Prelude (1982)
 
[[File:82-83ELCYLINDERHEADLAYOUT1.jpg|750px|]]
[[File:82-83ELCYLINDERHEADLAYOUT.jpg|750px|]]
 
===Specs===
* 8:8:1 Compression
* 80 HP @ 5000 RPM
* 93 ft lb Torque @ 3500 RPM
* Redline @ 6000 RPM
* Intake valve diameter (36mm), Exhaust valve diameter (30mm).
 
===Engine Weight w/ Trans===
* 5spd -  
* Auto -  


Japanese versions of the 689 used different profiles throughout the two years.
===PC3 Cam Profile===
*79 Manual JDM# 14110-689-000
* EL-1400001~ 5SPD & HMT CAM# 12251-PC1-000
*79 Auto JDM# 14110-689-900
**AUX IN CAM HEIGHT -  
*80 Manual JDM# 14110-689-010
**MAIN IN CAM HEIGHT -  
*80 Auto JDM# 14110-689-901
**MAIN EX CAM HEIGHT -  


===Notes===
===Notes===
Brand new for 1979 Accord and Prelude models, it essentially was a beefier version of the previously used EF 1.6l cylinder head on a longer block.
* Depending on location, this cylinder head may be casted with HF "C" on the front. The spark plug numbers are casted directly under the valve cover, where the previous heads were casted above the spark plug holes. Cam gear is of a solid metal type design, versus the older start shaped.

Latest revision as of 16:52, 1 May 2024

The EL 1.6l engine was manufactured by Honda Motor Company between 1979-1983 for the 1st generation Honda Accord and 1st generation Honda Prelude. It is part of the E-series of Honda engines. Introduced new for the 1979 model year, it replaced the standard EF. It was a water cooled, SOHC 8-Valve CVCC engine with a displacement of 1.6L (1602CC). Output varied as the engine went through two updates during it's production. The EL 1.6l engine was standard in Canada, Europe and Australian Markets. Transmission choices were an automatic 2spd/3spd or manual 5 speed.

The EL series is an interference engine!

There are three variations of this cylinder head, depending on the year Honda it was offered in.

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.

Overview

  • Displacement 1.6 L (1,602 cc)
  • Inline four cylinder, transverse
  • Cast iron block & aluminum silicon alloy cylinder head
  • Redline limit - 79-80 Models 5,800 RPM, 81-82 Models 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 / 4 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
  • Redline @ 5800 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~ CAM# 14110-676-640
  • EL-1200001~ CAM# 14110-676-641
    • AUX IN CAM HEIGHT -
    • MAIN IN CAM HEIGHT -
    • MAIN EX CAM HEIGHT -
  • EL-1300001~ 5SPD CAM# 14110-676-600
    • AUX IN CAM HEIGHT -
    • MAIN IN CAM HEIGHT -
    • MAIN EX CAM HEIGHT -
  • EL-1300001~ HMT CAM# 14110-676-740
    • AUX IN CAM HEIGHT -
    • MAIN IN CAM HEIGHT -
    • MAIN EX CAM HEIGHT -

Notes

(676-2) 1981 Non-CVCC Cylinder Head

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

  • CDM/EDM EL-1300001~ Prelude (1981)

Specs

  • 8:4:1 Compression
  • 75 HP @ 5000 RPM
  • 90 ft lb Torque @ 3500 RPM
  • Redline @ 6000 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 CAM# 14110-676-600
    • AUX IN CAM HEIGHT -
    • MAIN IN CAM HEIGHT -
    • MAIN EX CAM HEIGHT -
  • EL-1300001~ HMT CAM# 14110-676-740
    • AUX IN CAM HEIGHT -
    • MAIN IN CAM HEIGHT -
    • MAIN EX CAM HEIGHT -

Notes

  • Casting variations show HF "A" or "B" on front, most likely representing it was for an automatic or manual setup.

(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
  • Redline @ 6000 RPM
  • Intake valve diameter (36mm), Exhaust valve diameter (30mm).

Engine Weight w/ Trans

  • 5spd -
  • Auto -

PC3 Cam Profile

  • EL-1400001~ 5SPD & HMT CAM# 12251-PC1-000
    • AUX IN CAM HEIGHT -
    • MAIN IN CAM HEIGHT -
    • MAIN EX CAM HEIGHT -

Notes

  • Depending on location, this cylinder head may be casted with HF "C" on the front. The spark plug numbers are casted directly under the valve cover, where the previous heads were casted above the spark plug holes. Cam gear is of a solid metal type design, versus the older start shaped.
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