EL 1.6L ENGINE: Difference between revisions

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.

@@ Line 1: / Line 1: @@
-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==
@@ Line 9: / Line 13: @@
 * Displacement 1.6 L (1,602 cc)
 * Inline four cylinder, transverse
-* Cast iron block & aluminum cylinder head
+* Cast iron block & aluminum silicon alloy cylinder head
-* Redline limit - 6,000 RPM
+* Redline limit - 79-80 Models 5,800 RPM, 81-82 Models 6,000 RPM
 * Two barrel Keihin Carburetor w/ manual choke
 * Electronic Ignition
@@ Line 28: / Line 32: @@
-==1979 - 1981 Non-CVCC Cylinder Head (676)==
+==(676-1) 1979 - 1980 Non-CVCC Cylinder Head==
-Six port cylinder head (4 intake ports / 2 exhaust ports) for 1979-1981 models.
+Eight port cylinder head (4 intake ports / 4 exhaust ports) for 1979-1980 models.
 * CDM/EDM EL-1000001~ Prelude (1979)
@@ Line 36: / Line 40: @@
 * CDM/EDM EL-1300001~ Prelude (1981)
-[[File:79-81ELCYLINDERHEADLAYOUT.jpg|750px|]]
+[[File:79-80ELCYLINDERHEADLAYOUT.jpg|750px|]]
 ===Specs===
-* 8:0:1 Compression
+* 8:4:1 Compression
-* 72 HP @ 4500 RPM
+* 73.5 HP @ 5000 RPM
-**68 HP @ 4500 RPM w/ Hondamatic '79 & '80 Models
+* 90 ft lb Torque @ 3000 RPM
-* 94 ft lb Torque @ 3000 RPM
+* Redline @ 5800 RPM
-**94 ft lb Torque @ 3500 RPM w/ Hondamatic '79 Model
+* Intake valve diameter (34mm), Exhaust valve diameter (28mm).
-**94 ft lb Torque @ 2500 RPM w/ Hondamatic '80 Model
 ===Engine Weight w/ Trans===
-* 5spd - 338.5lbs (153.5kg)
+* 5spd -
-* Auto - 338.7lbs (153.6kg)
+* Auto -
-===676 Cam Profile===
+===676-1 Cam Profile===
 Three camshaft profiles were used on the manual/auto for these years.
-*EL-1000001~ 14110-676-640
+*EL-1000001~ CAM# 14110-676-640
-*EL-1200001~ 14110-676-641
+*EL-1200001~ CAM# 14110-676-641
 **AUX IN CAM HEIGHT -
 **MAIN IN CAM HEIGHT -
 **MAIN EX CAM HEIGHT -
-*EL-1300001~ 5SPD 14110-676-600
+*EL-1300001~ 5SPD CAM# 14110-676-600
 **AUX IN CAM HEIGHT -
 **MAIN IN CAM HEIGHT -
 **MAIN EX CAM HEIGHT -
-*EL-1300001~ HMT 14110-676-740
+*EL-1300001~ HMT CAM# 14110-676-740
 **AUX IN CAM HEIGHT -
 **MAIN IN CAM HEIGHT -
@@ Line 71: / Line 74: @@
 ===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)
+[[File:79-80ELCYLINDERHEADLAYOUT1.jpg|750px|]]
+[[File:79-80ELCYLINDERHEADLAYOUT.jpg|750px|]]
+===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.
-==1982 - 1983 Non-CVCC Cylinder Head (PC3)==
+==(PC3) 1982 - 1983 Non-CVCC Cylinder Head==
-Four port cylinder head (4 intake ports / 4 exhaust ports) for 82-83 Honda models.
+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)
+[[File:82-83ELCYLINDERHEADLAYOUT1.jpg|750px|]]
 [[File:82-83ELCYLINDERHEADLAYOUT.jpg|750px|]]
@@ Line 84: / Line 123: @@
 * 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===
@@ Line 90: / Line 131: @@
 ===PC3 Cam Profile===
-CAM# 12251-PC1-000
+* EL-1400001~ 5SPD & HMT CAM# 12251-PC1-000
 **AUX IN CAM HEIGHT -
 **MAIN IN CAM HEIGHT -
@@ Line 96: / Line 137: @@
 ===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.