BDA Cam Timing NO marks on Cam sprockets

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RV-4
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BDA Cam Timing NO marks on Cam sprockets

Need info on timing my BDA with no cam sprocket timing marks. Starting from scratch and dont want to BEND any valves ?

Cheers

George

E-Mail...........george7@hughes.net

Wrightpayne
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George,

from one of my prized possessions, Haynes manual 139 for the Mk1 Escort Mexico, BDA and RS2000 the timing marks should look like this...subtle lines on the pulleys...

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This build is NOT a stock BDA with timing marks. Cams have to be set to a predetermined position before cam timing.

George

Wrightpayne
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George,

A bit more detail on the build might have helped get a meaningful response.

Ian

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From the same Haynes manual that Ian referred to above this is the valve timing info:

However if this is not a standard engine the timing figures will be related to the cams, whatever they are.  Do you know what cams are in it?

Andrew

1985 S3 1700 XFlow.  Undergoing full restoration

SLR No.77
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George, if you have the specifications for the cams and you work through everything slowly it should be fairly straightforward, you'll need a 360 deg protractor (Kent Cams do a decent one) and suitable dial gauges. Once you've set the crank at 90 deg BTDC you can fit the protractor (to represent this) and mark out the "safe zone" so you avoid the pistons going anywhere near the valves. Then use the dial gauges to assess the fully closed and lift positions of the cams and progress carefully ... maybe you know this already though!

Stu.

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The register for all numbered limited-edition Caterhams ....... www.thecaterhamregister.net ...... www.instagram.com/thecaterhamregister

Wrightpayne
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When I fitted vernier cam pulleys to my K series I designated each pulley as either inlet or exhaust then transferred over the timing marks from the original pulleys, so I could fit the cam belt. Following Dave Andrews guidelines (DVA power / Oily on BC) I retarded the inlet pulley 10 degrees and advanced the exhaust pulley 10 degrees to protect the engine pre accurate cam timing.

Wrightpayne
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The process for the K is described on Dave's website...

http://www.dvapower.co.uk/

SLR No.77
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Ian, it's very different when you have marked pulleys to start from, if there's nothing there you need to start from scratch with the engine at 90 BTDC and work out what the cams are doing.

Stu.

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The register for all numbered limited-edition Caterhams ....... www.thecaterhamregister.net ...... www.instagram.com/thecaterhamregister

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Thanks Stu,

I am still in a FOG

George