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Head gasket change A20A4
Hey guys,
I have an Accord SI A20A4, the car overheats and has low (lower) compression on 1 cylinder. I have diagnosed a broken head gasket.
I am unsure as to how I go about taking the cylinder head off.( know the basic prinicples, like TDC, loosen bolts in order, torque wrench specs etc.)
I dont have much expirience with FWD engines, I've taken the air intake off a pulsar 88 before but thats about it.
I have read about a guy who removed his cylinder head with the air intake still attached to the head but that was a different engine(still a honda though) ,the accord I have has wires and crap everywhere so its probably best to separate the head from the air intake before removing the head
Main q is, how do i go about removing the lower row of bolts under the air intake ?? On the pulsar i worked on, I ended up disconnecting a plastic pipe(cooling system) that ran parallel with the head, so i could fit a spanner in there to loosen the air intake bolts. Is it similar with the A20A4 ? Also I think I may have to remove the coolant pump and alternator aswell (grr).
The air intake manifold also seems to be bolted to another mount attached to the firewall.
It is no economically viable for me to pay for this to be fixed by a pro mechanic.
I know its an old engine, (runs very smoothly though, just overheats) byt some1 here has to know how to do it !!!!
Any tips would be greatly appreciated !!!
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Pro mechanic, it's good and shows you have knowledge diagnosising a problem with your car, but for god sakes if you are not confident in pulling and reassembling the head which may/may not require machining then by all means do NOT attempt at any cost, in the end if something gets ****ed it's gonna cost you a shit load more than getting a pro to fix it for you.
Why hello there
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You need to resurface the cylinder head and block before you reassemble it otherwise it will probably just leak again...
What are the compression numbers on the cylinder? Is the car loosing oil or coolant? or are the two being mixed?
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Originally Posted by Drew
You need to resurface the cylinder head and block before you reassemble it otherwise it will probably just leak again...
What are the compression numbers on the cylinder? Is the car loosing oil or coolant? or are the two being mixed?
Yeah i know i have to clean the 2 surfaces before i place another gasket. and check for warping etc.
I bought the car knowing it had a problem, the seller said his mechanic diagnosed a broken head gasket aswell, I checked the compression myself to confirm this.
The car leaks coolant, my hand gets extremely moist when i hold it at the exhaust. I was just asking if anyone has done it before incase there is an easy way("easy" is a term used loosely here lol).
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So have you check the compression yourself?
I've done many head gaskets; there is never really an easy way of doing it... You either do it right or cut corners and pay for it later
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Originally Posted by Drew
So have you check the compression yourself?
I've done many head gaskets; there is never really an easy way of doing it... You either do it right or cut corners and pay for it later
Yes i have checked it myself, have you changed a head gasket for a A20A4 ??
If so can you remember what you did ?
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Originally Posted by Drew
What were the numbers...
cylinder 1, 4bar, then the other cylinders were 7,7,7 bar.
The numbers arent of my concern right now, all im after are peoples methods for taking off the head, like whether to leave the intake attached to the head when removing etc. Someone here must have taken the head of 1 of these who can give some tips n advice.
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I haven't done one on a A20a4 engine, I'm assuming it's a n/a horizontal four cylinder. You do not need to take the intake manifold off to remove the head, but will need to come off if the head requires machining. Basically you will have the head and the intake manifold attached and all other things that get in the way removed which (basing on a pulsar not a a20a4). In the end there's many ways people do it, I usually do it my way cos I've adopted a routine to help me memorise.
Why hello there
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pics don't work and it's perfectly normal for parts of the gasket to have fused to the head and block surfaces. Any coolant in the cylinders?
Why hello there
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Originally Posted by shadou
pics don't work and it's perfectly normal for parts of the gasket to have fused to the head and block surfaces. Any coolant in the cylinders?
Yeah coolant was in the cylinders, except for cylinder 4,(the best cylinder). im fixing the pics now, im using geocities as a host, i take it thats not the conventional method for storing pics on the net .....
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