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V8-250 Saloon: Locking the Rocker Gear

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classiclife
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V8-250 Saloon: Locking the Rocker Gear

Post by classiclife » Thu Jun 27, 2019 10:31 am

Hello,

I will be removing the cylinder heads from my Daimler V8-250 and reading the WSM it suggests using a 1/4"UNF bolt to hold the rocker gear assembly together when removing.

Presumably all the rocker gear assemblies require this prior to removal ??

Out of interest, does anyone know how long the bolt needs to be to facilitate such a procedure ??

Many thanks.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

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Vortex O'Plinth
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by Vortex O'Plinth » Thu Jun 27, 2019 4:50 pm

The bolt should be fitted to the front of the RH rocker shaft pedestals and the rear of the LH ones. The bolt length is not critical, you need enough thread to pass through the pedestal and lock it to the rocker shaft (otherwise the rocker shaft assembly is in danger of springing apart as you remove it). I'd have thought a 1/2" of thread would be more than enough.
Nick

"Open the pod bay door Hal".

classiclife
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by classiclife » Thu Jun 27, 2019 6:05 pm

Many thanks Nick, that's excellent info.

All the best.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

DaveM
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by DaveM » Fri Jun 28, 2019 10:03 am

Picture speaks a thousand words
rocker removal.jpg
Nick is correct in their location (One at the front, one at the back, opposite ends to the tab locked bolt heads) mine are both at the front just because thats how I temporarily assembled them

Thanks Dave

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Alpine Daimler
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by Alpine Daimler » Fri Jun 28, 2019 10:54 am

May I temporarily go off topic and hijack this thread just for a moment? I will anyway:)

The picture seems to show some rework on the block around the waterways.

Is that a cavitation repair? Has "JP Weld" or similar been applied and ground down carefully with wet and dry wrapped around flat steel block or alternative to reproduce a flat mating surface?

The reason I ask is the I am at the stage of waiting for my cylinder heads following overhaul and am considering performing this repair as I have minor (I hope!) cavitation at the same, but not at all, positions.

Thanks.

Rob C
V8, its the only way forward, 1967 2.5 V8 Saloon LHD MAN/OD, DLOC member

Christopher Storey
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by Christopher Storey » Fri Jun 28, 2019 11:36 am

The picture also appears to show the pistons fitted to the wrong sides !

DaveM
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by DaveM » Fri Jun 28, 2019 11:46 am

Hi Rob, No repairs on the block just the head water passageways which is a typical fault and easily repaired. Block was acid dipped and crack tested, then bored and head faces just surface ground a fraction. Think what your seeing is just some discolouration around the water passages.

Cheers Dave

DaveM
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by DaveM » Fri Jun 28, 2019 12:12 pm

Well spotted with the pistons they are indeed in the wrong place with regards to the manual, but I've always numbered engines from the front looking aft, with number 1 at the front and right/left looking aft, old navy habit. Engine numbering does now conforms to manual with the engine now in the car so right/left reverses as the manual dictates looking forward for right/left. Imagine the timing issues if you got it wrong :D

classiclife
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Re: V8-250 Saloon: Locking the Rocker Gear

Post by classiclife » Fri Jun 28, 2019 2:29 pm

Thanks for the photo, Dave, very useful.

I take it, although appears unnecessary, that the rocker assemblies can - if required - be locked down at each corner ??

Albeit RH front and LH rear does the job.

Regards.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Area Representative.

Southern Classics Society Events Co-ordinator.
www.southernclassics.org.uk

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