EK 1.8L ENGINE - Revision history

Mitchn at 16:51, 1 May 2024

2024-05-01T16:51:25Z

← Older revision		Revision as of 16:51, 1 May 2024
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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. It is part of the E-series of engines. 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 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. It is part of the E-series of Honda engines. 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 its production. Most notably was the introduction of the CVCC-II emission setup in later 1980 models. The EK 1.8l engine was standard in Japanese and US Markets. All other markets worldwide had standard the non-CVCC EL 1.6L engine. Transmission choices were an automatic 2spd/3spd or manual 5 speed.

	The EK series is an interference engine ~~setup~~!		'''The EK series is an interference engine!'''

	There are three variations of ~~this~~ cylinder ~~head~~, depending on the year Honda ~~it was offered in~~.		There are three variations of cylinder heads used for the EK1, depending on the year Honda.

	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.		Minor engine issues are known to occur, especially 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.

	[[File:EK1enginestock.jpg\|750px\|]]		[[File:EK1enginestock.jpg\|750px\|]]
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	* Displacement 1.8 L (1,751 cc)		* Displacement 1.8 L (1,751 cc)
	* Inline four cylinder, transverse		* Inline four-cylinder, transverse
	* 77mm bore x 94mm stroke (3.03 in × 3.70 in)		* 77mm bore x 94mm stroke (3.03 in × 3.70 in)
	* Cast iron block & aluminum silicon alloy cylinder head		* Cast iron block & aluminum silicon alloy cylinder head
	* Redline limit - 79-80 Models 5,800 RPM, 81-82 Models 6,000 RPM		* Redline limit - 79-80 Models 5,800 RPM, 81-82 Models 6,000 RPM
	* Three barrel Keihin Carburetor w/ auto choke		* Three-barrel Keihin Carburetor w/ auto choke
	* Electronic Ignition		* Electronic Ignition
	* Belt driven timing gear		* Belt driven timing gear

Mitchn at 18:39, 15 April 2024

2024-04-15T18:39:17Z

← Older revision		Revision as of 18:39, 15 April 2024
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. It is part of the E-series of engines. 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 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. It is part of the E-series of engines. 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 EK series is an interference engine setup.		The EK series is an interference engine setup!

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

Mitchn: /* (PC1) 1982 - 1983 CVCC-II Cylinder Head */

2022-03-14T23:05:51Z

(PC1) 1982 - 1983 CVCC-II Cylinder Head

← Older revision		Revision as of 23:05, 14 March 2022
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	* USDM EK1-4500001~ Accord/Prelude (49 S)		* USDM EK1-4500001~ Accord/Prelude (49 S)
	* USDM EK1-4900001~ Accord/Prelude (HI-AL)		* USDM EK1-4900001~ Accord/Prelude (HI-AL)
	* JDM EK-1400001~ Accord/Prelude (SZ100/SN300 Models)		* JDM EK-1400001~ Accord/Prelude/Vigor (SZ100/SN300 Models)
	* JDM EK-1500001~ Accord (SZ120 Models)		* JDM EK-1500001~ Accord/Vigor (SZ120 Models)
	*Revised intake and exhaust spacing for better heat distribution and exhaust flow. This was done to better isolate the exhaust valves.		*Revised intake and exhaust spacing for better heat distribution and exhaust flow. This was done to better isolate the exhaust valves.
	*Intake valve diameter increased by 1mm (36mm), Exhaust valve diameter increased by 2mm (30mm). Aux valve diameter (12mm). Piston is slight deeper dished than PB2 pistons, but not by much.		*Intake valve diameter increased by 1mm (36mm), Exhaust valve diameter increased by 2mm (30mm). Aux valve diameter (12mm). Piston is slight deeper dished than PB2 pistons, but not by much.

Mitchn: /* (PB2) 1981 CVCC-II Cylinder Head */

2022-03-14T16:12:24Z

(PB2) 1981 CVCC-II Cylinder Head

← Older revision		Revision as of 16:12, 14 March 2022
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	* USDM EK1-3500001~ Prelude (49 S)		* USDM EK1-3500001~ Prelude (49 S)
	* USDM EK1-3900001~ Prelude (HI-AL)		* USDM EK1-3900001~ Prelude (HI-AL)
	* JDM EK-1300001~ Prelude (SN200 Models)		* JDM EK-1300001~ Accord/Prelude (SM200/SN200 Models)
	*April 25, 1980 saw the Introduction of the new CVCC-II emission system, catalytic converter and EGR valve for all engines. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The pre-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.		*April 25, 1980 saw the Introduction of the new CVCC-II emission system, catalytic converter and EGR valve for all engines. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The pre-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.

Mitchn: /* (689) 1979 - 1980 CVCC Cylinder Head */

2022-03-14T16:11:57Z

(689) 1979 - 1980 CVCC Cylinder Head

← Older revision		Revision as of 16:11, 14 March 2022
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	* USDM EK1-2500001~ Prelude (1980 49 S)		* USDM EK1-2500001~ Prelude (1980 49 S)
	* USDM EK1-2900001~ Prelude (1980 HI-AL)		* USDM EK1-2900001~ Prelude (1980 HI-AL)
	* JDM EK-1000001~ Prelude (SN100 Models)		* JDM EK-1000001~ Accord/Prelude (SM100/SN100 Models)
	* JDM EK-1200001~ Prelude (SN110 Models)		* JDM EK-1200001~ Accord/Prelude (SM120/SN110 Models)
	*Note - 1980 California Automatic models used the newer PB2 cylinder head design only during this year for emission standards.		*Note - 1980 California Automatic models used the newer PB2 cylinder head design only during this year for emission standards.

Mitchn: /* (PC1) 1982 - 1983 CVCC-II Cylinder Head */

2022-03-14T16:10:50Z

(PC1) 1982 - 1983 CVCC-II Cylinder Head

← Older revision		Revision as of 16:10, 14 March 2022
Line 126:		Line 126:
	* USDM EK1-4500001~ Accord/Prelude (49 S)		* USDM EK1-4500001~ Accord/Prelude (49 S)
	* USDM EK1-4900001~ Accord/Prelude (HI-AL)		* USDM EK1-4900001~ Accord/Prelude (HI-AL)
	* JDM EK-1400001~ Prelude (SN300 Models)		* JDM EK-1400001~ Accord/Prelude (SZ100/SN300 Models)
	* JDM EK-1500001~ Accord (SZ120 Models)		* JDM EK-1500001~ Accord (SZ120 Models)
	*Revised intake and exhaust spacing for better heat distribution and exhaust flow. This was done to better isolate the exhaust valves.		*Revised intake and exhaust spacing for better heat distribution and exhaust flow. This was done to better isolate the exhaust valves.

Mitchn: /* (PB2) 1981 CVCC-II Cylinder Head */

2022-02-24T19:17:41Z

(PB2) 1981 CVCC-II Cylinder Head

← Older revision		Revision as of 19:17, 24 February 2022
Line 95:		Line 95:
	* USDM EK1-3900001~ Prelude (HI-AL)		* USDM EK1-3900001~ Prelude (HI-AL)
	* JDM EK-1300001~ Prelude (SN200 Models)		* JDM EK-1300001~ Prelude (SN200 Models)
	*April 25, 1980 saw the Introduction of the new CVCC-II emission system, catalytic converter and EGR valve for all engines. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The ~~sub~~-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.		*April 25, 1980 saw the Introduction of the new CVCC-II emission system, catalytic converter and EGR valve for all engines. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The pre-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.

	[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]		[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]

Mitchn: /* (PB2) 1981 CVCC-II Cylinder Head */

2022-02-24T19:16:28Z

(PB2) 1981 CVCC-II Cylinder Head

← Older revision		Revision as of 19:16, 24 February 2022
Line 95:		Line 95:
	* USDM EK1-3900001~ Prelude (HI-AL)		* USDM EK1-3900001~ Prelude (HI-AL)
	* JDM EK-1300001~ Prelude (SN200 Models)		* JDM EK-1300001~ Prelude (SN200 Models)
	*April 20, 1980 saw the Introduction of the new CVCC-II emission system, catalytic converter and EGR valve for all engines. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The sub-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.		*April 25, 1980 saw the Introduction of the new CVCC-II emission system, catalytic converter and EGR valve for all engines. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The sub-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.

	[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]		[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]

Mitchn: /* (PB2) 1981 CVCC-II Cylinder Head */

2022-02-24T19:16:14Z

(PB2) 1981 CVCC-II Cylinder Head

← Older revision		Revision as of 19:16, 24 February 2022
Line 95:		Line 95:
	* USDM EK1-3900001~ Prelude (HI-AL)		* USDM EK1-3900001~ Prelude (HI-AL)
	* JDM EK-1300001~ Prelude (SN200 Models)		* JDM EK-1300001~ Prelude (SN200 Models)
	*Introduction of the new CVCC-II emission system, catalytic converter and EGR valve. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The sub-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.		*April 20, 1980 saw the Introduction of the new CVCC-II emission system, catalytic converter and EGR valve for all engines. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The sub-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.

	[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]		[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]

Mitchn: /* (PB2) 1981 CVCC-II Cylinder Head */

2022-02-24T19:15:21Z

(PB2) 1981 CVCC-II Cylinder Head

← Older revision		Revision as of 19:15, 24 February 2022
Line 95:		Line 95:
	* USDM EK1-3900001~ Prelude (HI-AL)		* USDM EK1-3900001~ Prelude (HI-AL)
	* JDM EK-1300001~ Prelude (SN200 Models)		* JDM EK-1300001~ Prelude (SN200 Models)
	*Introduction of the new CVCC-II emission system, catalytic converter and EGR valve. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup.		*Introduction of the new CVCC-II emission system, catalytic converter and EGR valve. Intake valve diameter increased 1mm (35mm), Exhaust valve diameter stayed the same (28mm). Aux valve diameter stayed the same (12mm). The original 2 port exhaust layout was changed to 4 ports to create a greater resistance with uneven heating. Increased compression was changed 8.8:1 with a slightly deeper dished piston dome. A slightly hotter spark plug was introduced due to the newer emission setup. The sub-combustion chamber for the Aux valve was moved closer to the main combustion chamber and introduced a torch fire setup, which were 5 small holes in the chamber better ignition and to aid with the EGR setup.

	[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]		[[File:81EK1CYLINDERHEADLAYOUT.jpg\|750px\|]]