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Cylinder 1 Inlet Valve Rocker broken
Posted: Sun Feb 18, 2024 1:19 pm
by ronveerlal
Diagnostics already done Cylinder 1 Inlet valve Rocker Broken on a BMW 325ix
I have had a few quotes of just over £2000 is there any chance you can just pull out the camshaft, and replace the broken rocker.
based in the UK.
thanks
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Re: Cylinder 1 Inlet Valve Rocker broken
Posted: Sun Feb 18, 2024 1:58 pm
by flybynite
Impossible to say without seeing what damage the broken rocker has done and if there has been any piston to valve contact or anything broke in the head.
You can't remove the cam or rocker shafts with the head in place so either the engine has to come out or the head come off. If it is cyl 5 or 6 you can sometimes get away with it as the shafts will come out that far with the rad out but not cyl 1.
When you do get a complete set of the latest Febi rockers of the updated design and maybe a set of new valve springs if they seem weak and have caused bounce.
Re: Cylinder 1 Inlet Valve Rocker broken
Posted: Sun Feb 18, 2024 6:48 pm
by fixedwheelnut
I have seen camshafts and rockers changed with engine in situ, but for what it takes it can be just as easy to remove the cylinder head.
To do it in situ, the bonnet has to come off, then drain coolant and remove rad hoses and fan, cambelt and top cover then undo engine mounts and lift up the engine so that the shafts can be removed from the front over the top of the radiator.
Like I said just as easy to remove the cylinder head.
Re: Cylinder 1 Inlet Valve Rocker broken
Posted: Sun Feb 18, 2024 7:36 pm
by flybynite
fixedwheelnut wrote: ↑Sun Feb 18, 2024 6:48 pm
To do it in situ, the bonnet has to come off, then drain coolant and remove rad hoses and fan, cambelt and top cover then undo engine mounts and lift up the engine so that the shafts can be removed from the front over the top of the radiator.
I have seen it tried couple of times, always ended with head off. You can get it high enough for the rocker shafts, that is if they come out easy without being able to drift them from behind, seen a few shafts knackered in the process especially if they have a step in them. For the cam it has to come higher and you are up against the bulkhead. Exhaust has to be disconnected somewhere and usually back of the gearbox dropped too.
fixedwheelnut wrote: ↑Sun Feb 18, 2024 6:48 pm
Like I said just as easy to remove the cylinder head.
yep couldn't agree more
Good opportunity to check the valve and piston too