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Alignment of rocker arms 

 

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 Post subject: Alignment of rocker arms
Posted: Wed Apr 22, 2015 5:40 pm 
Oompa Loompa
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Age: 40

Posts: 42

Joined: 29th Jan 2008

Gallery: 1 images

Ride: BAII Futura

Location: Wangaratta
VIC, Australia

I have a Tickford head which I believe comes out an EB2.
The camshaft is a Wade 977b and I fitted the head with new Crow double springs and new stem seals.
I first installed it with a single set of shims instead of 2 as everyone recommends since the pre-load seemed ok.
A few lifters got damaged with the engine only running a few hours all up.

As per the photos below, the rocker arm doesn't line up exactly with the valve stem.
Both EB and ED rocker assembly give the same result, whereas AU rockers line up perfectly.
Is this normal?
Could that lead to smashed up lifters?

Image
Image

E series rocker arm:
Image

AU rocker arm:
Image

Head part number:
Image

Photo I took when I found one of the lifters falling appart while unbolting the rocker assembly:
Image
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 Post subject: Re: Alignment of rocker arms
Posted: Fri Apr 24, 2015 8:11 pm 
Getting Side Ways
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Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

AU rockers are a different ratio to E series rockers.... 1.8:1 verses 2.0:1.
This will effect the total lift....makes it less, therefore, wasting the cams lift, and overall performance of the cam.
The rockers will be slightly misaligned, so the effect of rotating the valve, can happen while going through it's usual movement.

 

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 Post subject: Re: Alignment of rocker arms
Posted: Mon Apr 27, 2015 10:30 am 
Oompa Loompa
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Age: 40

Posts: 42

Joined: 29th Jan 2008

Gallery: 1 images

Ride: BAII Futura

Location: Wangaratta
VIC, Australia

cjh wrote:
AU rockers are a different ratio to E series rockers.... 1.8:1 verses 2.0:1.
This will effect the total lift....makes it less, therefore, wasting the cams lift, and overall performance of the cam.
The rockers will be slightly misaligned, so the effect of rotating the valve, can happen while going through it's usual movement.

That's OK, AU rockers were for illustration only.
My concern is that with E-series rockers, the lifters are misaligned by a couple of mm.
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 Post subject: Re: Alignment of rocker arms
Posted: Thu Apr 30, 2015 7:41 pm 
Getting Side Ways
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Age: 49

Posts: 6467

Joined: 18th Dec 2006

Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Whats the condition of the Valve Guides ???...curious.

 

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