F23A4 Middle Intake Rocker Arm moving too much when installed
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F23A4 Middle Intake Rocker Arm moving too much when installed
Hi everyone, I have a 2001 Honda Accord 4DR F23A4 motor that Ultra Low emissions.
I am redoing the rocker arm install due to a leaking hondabond gasket near the distributor. I noticed though when I took off the rockers that the middle rocker arm for Cylinder#4 had its piston missing. Luckily it was still on the motor and I could grab it.
I reinstalled the rocker arms and noticed that the middle rocker arm on intake side moves down way to much and therefore the piston can pop out. When I try and press down the other middle rockers they don't move down.
I feel the issue may be the rocker is compressed all the way at the end and that is why that rocker is moving too much on cylinder#4 compared to others. When I was installing the rocker though the bolts all bolted down easily and not issues. I am just confused. There isn't a mechanism which holds the those rockers tight other than compression force in my mind.
Anyone ever had this issue?
Edit--
I took some more time and found out why that rocker arm was moving too much. There is a spring under that rocker which broke and therefore no resistance for its motion. I included some pictures below of what I am talking about. The part number is 14820-PAA-A01 and item number is picture is #15. It seems the spring as failed and broke. Therefore I am replacing all the springs in case others starts to break as well. My car has 350,000 miles. Decided to upload this to help others in case you have this problem since there isn't much information.
I am redoing the rocker arm install due to a leaking hondabond gasket near the distributor. I noticed though when I took off the rockers that the middle rocker arm for Cylinder#4 had its piston missing. Luckily it was still on the motor and I could grab it.
I reinstalled the rocker arms and noticed that the middle rocker arm on intake side moves down way to much and therefore the piston can pop out. When I try and press down the other middle rockers they don't move down.
I feel the issue may be the rocker is compressed all the way at the end and that is why that rocker is moving too much on cylinder#4 compared to others. When I was installing the rocker though the bolts all bolted down easily and not issues. I am just confused. There isn't a mechanism which holds the those rockers tight other than compression force in my mind.
Anyone ever had this issue?
Edit--
I took some more time and found out why that rocker arm was moving too much. There is a spring under that rocker which broke and therefore no resistance for its motion. I included some pictures below of what I am talking about. The part number is 14820-PAA-A01 and item number is picture is #15. It seems the spring as failed and broke. Therefore I am replacing all the springs in case others starts to break as well. My car has 350,000 miles. Decided to upload this to help others in case you have this problem since there isn't much information.
Last edited by Xene; Jul 10, 2015 at 09:37 AM. Reason: Solved problem
Thread Starter
Honda-Tech Member
Joined: May 2015
Posts: 12
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Re: F23A4 Middle Intake Rocker Arm moving too much when installed
Funny thing is the motor ran normally. As long as you don't engage VTEC I guess, since that is what the middle rocker does by increasing the length of time the intake valve opens. I drive my car very fuel efficient in mind so never go over like 5k.
One of the pistons was luckily just sitting in a valley of head to take out easy. The broke spring I was able to retrieve down an oil passage with a magnetic pickup since I didn't see that piece initially so assumed it went down the oil passage next to rocker arm.
One of the pistons was luckily just sitting in a valley of head to take out easy. The broke spring I was able to retrieve down an oil passage with a magnetic pickup since I didn't see that piece initially so assumed it went down the oil passage next to rocker arm.
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