Series 2a/3 topend noise

Head off I think
Piston?
Precombustion chamber?

t was past my bedtime

@rynner Probably the best advice I can give is repost in the series engine section and hopefully James Martin will advise.

Just listened to video on 1/4 Speed
I heard 36 Taps in 30 secs

72 in one minute At 1/4

=288 in one minute

Assume 500rpm tickover

then this about half tickover speed which points to one cam lobe/ tappet noise every 2 crank revs

It's a petrol, no pre combustion chambers.

Thanks for taking the time to do that,it is appreciated.
an update will follow
Atb
Ryn@ lovely sunny west cornwall.

It could be a flat spot on cam lobe or some wear in the bits above as in pic below
Round roller , the tappet guide steel ( this is located by bolts in block seen in second pic ) if bolt was loose it could move when not supposed to
The the brass sliding part where the bottom of push rod sits could be damaged
Are you sure no head leaks around cylinder head joint
I bought a new rocker from turners on my rebuild and that had discolouration , I think this will be due to the heat treatment for hardening the rocker

rynner said:

A small area of concern that may be related was when the cover was off the part that the front cover bolt screws into(journal

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Not sure which bit you mean

I wonder, could it be the rocker shaft itself in trouble? The series engine has a good strong pedestal for the rocker, but there are clamp bolts to tighten the shaft.

Pop the rocker cover off again, and check the 5 pedestals. Make sure the shaft isn't broken or loose.

Depending how far you want to go the shaft could be dismantled carefully to check for wear
May be possible to detect smoothness of cams with finger on end of pushrod while rotating engine by hand

good afternoon,the componant with the evidence of past removed corrosion is the 'Rocker shaft support bracket',the front one,
The corrosion was where it meets the head casting.
Thanks
Ryn

Interesting. Any photos? That's held on with a cylinder head bolt, which should be torqued to 70 ish feet pounds.

Have a search on here for tapping noise too

Good morning,
It went into the garage for a safety check on monday and the good news was that the servo 11" tls brakes, parabolic suspension,steering and the rest are all working as they should,
Thanks to all for the advice,
Ryn.

That’s comforting, did they say what was causing the noise problem

I would find a better garage.

Blackburn said:

I would find a better garage.

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Its probably just a landrover thing