FASTdan
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| posted on 20/10/08 at 11:09 AM |
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ticky pinto
our pinto currently has quite a loud 'ticking' noise and we cant quite work out what it is. we set the valve clearances as per haynes but
we've still got this noise which appears to be coming from the dizzy. If you put upward pressure on the dizzy (kinda pull it up away from the
block) the noise amplifies. However we've had the dizzy off and inspected it but been unable to find anything.
Anyone any idea? im fairly sure its the dizzy, but as i say i cant see anything wrong with it (its a transit item i think).
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Paul TigerB6
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| posted on 20/10/08 at 11:23 AM |
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The oil pump is driven off the distributor drive shaft isnt it?? Have you checked this also for wear??
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mookaloid
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| posted on 20/10/08 at 12:07 PM |
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At a guess from your previous posts you have twin 40 dellortos fitted.
If this is the case then if you have taken a vacuum take off from one branch of the manifold then what you are hearing is the vacuum advance being
rapidly moved as it sees the vacuum pulses from the one cylinder you have it connected to.
A vacuum advance dizzy is not suitable for use in this way.
To confirm the diagnosis disconnect the vacuum advance pipe and the noise should go away.
You can get vacuumless dizzys from places like Aldon or H&H
or fit MegaJolt.
Cheers
mark
"That thing you're thinking - it wont be that."
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Mr Whippy
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| posted on 20/10/08 at 12:10 PM |
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interesting, never thought of that ^^
There is a long hexagonal rod rather like an Allen key running from the distributor to the oil pump below. This may be a bit worn. Personally
I'd turn the engine to no1 on the cap, mark the position of the base of the distributor on both it and the engine then take it off. It’s easy to
dismantle and check for wear. If nothings found, pull out the oil pump drive shaft and check it isn't worn as if it strips the corners off the
hex bar it will no longer turn the oil pump...
[Edited on 20/10/08 by Mr Whippy]
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matt_claydon
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| posted on 20/10/08 at 12:29 PM |
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When I had a dizzy and twin 40s I had exactly the same thing with the vacuum connected. I just disconnected the vacuum advance and it ran perfectly
(only loss was probably economy at low load).
If you took vacuum from all four inlet tracts, teed them together and ran through a fuel filter as a damper before connecting to the dizzy you may
solve the problem, but it's probably not worth the effort.
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jacko
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| posted on 20/10/08 at 03:44 PM |
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Just one thing when i striped my engine there was a circlip on the oil pump drive to stop it coming out when removing the dizzy.
if you have a circlip fitted i don't know if it can fall onto the sump if you pull the drive out
Jacko
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