DIY Si intake camshaft swap for your hatch (Unfinished)

[MetalKnightCivicHB]

Very nice little mod that can partially convert your hatch engine to an Si.
Si Intake Camshaft cost me around $130 from Honda. Intake side! NOT Exchuast side!
While doing this process, it is also the best way to swap your OEM headstuds to ARP.
(Only if you haven't had a head gasket issue. Only at your own risk!)
Make sure you get your hands on this direction for our civic. I used this as a guide.
https://www.civicx.com/forum/thread...-si-type-r-fc1-fc2-fc3-fc4-fk4-fk7-fk8.46297/
Just want to give thanks to Silent Sausage, and all the other folks involved in putting that together.
Please please read first, research, and be prepared before tackling this procedure.
I am not a mechanic.

Install time: can be done in a day.
Difficulty rating easy 1 to 5 hard: 4

Step 1: Follow this youtube guide to clear the intake camshaft.
From 6:15 to 20:22.



Step 2: Reveal the timing chain tensioner.
ChrisFix has a wonderful video on this. Good thing honda engines are nearly alike.
Watch 10:40 - 11:40



Step 3: Set your engine at Top Dead Center (TDC)!
Again, ChrisFix's detailed video on how to do the TDC. Watch 11:40 - 14:10




Step 4: Release chain tension.

Step 5: Lock the cams in place with a pin.

Step 6: Remove caps that are holding the camshaft.
Using the civicx manual guide, open PDF #5 Engine Mechanical System.
Go to page 105, and follow the loosening sequence.
There are 10 bolts. Here is my quick mock-up guide of order by number.
3 – 7 – 9 - 5 - 1
4 – 8 – 10 - 6 - 2

Step 7: Don't let the timing chain skip!
Important! Before separating the camshaft from the timing chain, I used a bungee cord and hooked it onto the chain allowing tension upward. From what I read, the reason for this so that the timing on the bottom skip. Again, don't let the timing chain skip.

Step 8: Loosening the VTC Actuator bolt.
Very difficult. Will need extra support unless you have some special tool for this.

Step 9: Reinstall VTC Actuator to the Si Intake Camshaft.
VTC gear bolt torque – 85 lbs

Step 10: Placing the new OEM Si intake Camshaft!
I lubed up the camshaft with motor oil.

Step 11:

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[Precord96FK7]

I'd be interested to see this.

I'm going to use your ARP head stud video as a go-by and install my ARP studs one at a time in the next month or so.

 

[FK7_Fever]

I am interested as well. In the next few months I plan doing this for a fuel upgrade, stand-alone ECUs just cost too much to add port injection

 

[Precord96FK7]

Very nice little mod that can partially convert your hatch engine to an Si.
Si Intake Camshaft cost me around $130 from Honda. Intake side! NOT Exchuast side!
While doing this process, it is also the best way to swap your OEM headstuds to ARP.
(Only if you haven't had a head gasket issue. Only at your own risk!)
Make sure you get your hands on this direction for our civic. I used this as a guide.
https://www.civicx.com/forum/thread...-si-type-r-fc1-fc2-fc3-fc4-fk4-fk7-fk8.46297/
Just want to give thanks to Silent Sausage, and all the other folks involved in putting that together.
Please please read first, research, and be prepared before tackling this procedure.
I am not a mechanic.

Install time: can be done in a day.
Difficulty rating easy 1 to 5 hard: 4

Step 1: Follow this youtube guide to clear the intake camshaft.
From 6:15 to 20:22.



Step 2: Reveal the timing chain tensioner.
ChrisFix has a wonderful video on this. Good thing honda engines are nearly alike.
Watch 10:40 - 11:40



Step 3: Set your engine at Top Dead Center (TDC)!
Again, ChrisFix's detailed video on how to do the TDC. Watch 11:40 - 14:10




Step 4: Release chain tension.

Step 5: Lock the cams in place with a pin.

Step 6: Remove caps that are holding the camshaft.
Using the civicx manual guide, open PDF #5 Engine Mechanical System.
Go to page 105, and follow the loosening sequence.
There are 10 bolts. Here is my quick mock-up guide of order by number.
3 – 7 – 9 - 5 - 1
4 – 8 – 10 - 6 - 2

Step 7: Don't let the timing chain skip!
Important! Before separating the camshaft from the timing chain, I used a bungee cord and hooked it onto the chain allowing tension upward. From what I read, the reason for this so that the timing on the bottom skip. Again, don't let the timing chain skip.

Step 8: Loosening the VTC Actuator bolt.
Very difficult. Will need extra support unless you have some special tool for this.

Step 9: Reinstall VTC Actuator to the Si Intake Camshaft.
VTC gear bolt torque – 85 lbs

Step 10: Placing the new OEM Si intake Camshaft!
I lubed up the camshaft with motor oil.

Step 11:

Question for you, did you keep the stock (non-Si) HPFP base when installing the Si intake cam or was that swapped out too? Just curious since I see a different part # for them:

12270-59B-000 (non-Si)
12270-5PA-A00 (Si)

I know you upgraded your entire fuel system, but any idea how much capacity this would help with if this is the only fuel upgrade done?

Thanks for taking the time with these write ups!

 

[MetalKnightCivicHB]

Question for you, did you keep the stock (non-Si) HPFP base when installing the Si intake cam or was that swapped out too? Just curious since I see a different part # for them:

12270-59B-000 (non-Si)
12270-5PA-A00 (Si)

I know you upgraded your entire fuel system, but any idea how much capacity this would help with if this is the only fuel upgrade done?

Thanks for taking the time with these write ups!

I swapped out my hpfp. Im not sure what kind of hpfp is mine from. Its a fuel kit upgrade.

Someone told me that the fuel kit I got provises 20-30% more fuel. But im not sure with the Si hpfp alone will do.

 

[AlexSt84]

what are the honda part numbers for both camshaft's?

 

[Tobiman]

Question for you, did you keep the stock (non-Si) HPFP base when installing the Si intake cam or was that swapped out too? Just curious since I see a different part # for them:

12270-59B-000 (non-Si)
12270-5PA-A00 (Si)

I know you upgraded your entire fuel system, but any idea how much capacity this would help with if this is the only fuel upgrade done?

Thanks for taking the time with these write ups!

The HPFP and injectors are from the 2.0 Accord. I don't know if it's possible to use the HPFP from the RDX or any other car with a version of the 2.0 engine. The part numbers are almost identical.

 

[Precord96FK7]

Si Intake cam
14110-5PA-A00

Non-si Intake Cam
14110-59B-000

For the HPFP base I was asking about, I wasn't referring to the HPFP, but the base that attaches to the cylinder head and the HPFP attaches to that. The Si and Non-si have different part #s.

#6 in the diagram below. Trying to see if this part needs to be swapped with Si part# when swapping in Si Intake cam.

 

[AlexSt84]

Asking to learn, is there a benefit of putting Si crankshaft in Non-Si hatch? and besides two crankshafts (intake and exhaust) what else needed to be replaced?

 

[Romeoridgee]

the camshaft lobes have the same height , what is the purpose of swapping out the cam if it has the same lift and duration?
Intake:
33.099 mm (1.30311 in)
Exhaust:
33.273 mm (1.30996 in)

 

[Precord96FK7]

the camshaft lobes have the same height , what is the purpose of swapping out the cam if it has the same lift and duration?
Intake:
33.099 mm (1.30311 in)
Exhaust:
33.273 mm (1.30996 in)

The square end of the Intake cam that drives the HPFP has a slightly different dimension with the SI vs Non-Si and provides a little additional pumping/drive for the HPFP to my understanding.

 

[MetalKnightCivicHB]

The square end of the Intake cam that drives the HPFP has a slightly different dimension with the SI vs Non-Si and provides a little additional pumping/drive for the HPFP to my understanding.

Thank you.
I was told that in order to maximize the use for the fuel upgrade kit, they recommended to swap out to the Si intake camshaft. The end part (square part) mechanically runs the hpfp.

 

[Ap1 George]

the camshaft lobes have the same height , what is the purpose of swapping out the cam if it has the same lift and duration?
Intake:
33.099 mm (1.30311 in)
Exhaust:
33.273 mm (1.30996 in)

The lobe that operates the HPFP is different. The purpose is to be able to use the OEM Si HPFP or other HPFP upgrades that uses the Si lobe.

 

[Romeoridgee]

The lobe that operates the HPFP is different. The purpose is to be able to use the OEM Si HPFP or other HPFP upgrades that uses the Si lobe.

Ahh, interesting.

 

[AlexSt84]

btw what are the part numbers for those? where you enter pins.

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