Lotus Elan

I left out my oil slinger. Doh!

PostPost by: pinsx3 » Sat Apr 16, 2005 5:26 pm

I am hoping that the slinger was a vestigal reminder of the days of
felt front oil seals and that our age of technology has rendered
them redundant.

Also, I am lazy and I want to drive it on the track tomorrow.

Thanks Arno.



Pete, when we build x-flows with duplex timing chains ( i.e.
double width)

we always leave the slinger out

BUT then I do not know if the duplex chain carries more oil than
the single,

so NO recommendation from me

My humble opinion of the slinger is that it actually slings oil
away from

the front oil seal, reducing another potentional ford/lotus oil
leak !!!




Arno




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pinsx3
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PostPost by: Arno Church » Sun Apr 17, 2005 7:00 am

It all came back to me while lying in bed last night



The timing chain gets its oil from a drilling in the front of the block ,
near the jackshaft sprocket. This squirts oil on the chain once every cam
rotation ( every second crank rotation) The drilling goes through to the
jackshaft front bearing and there is a groove cut in the jackshaft journal
, which "meters" the oil through to the chain

The area below the crank spigot is open to the sump below( this is where you
will find the timing chain if it breaks, trust me , I had it on the x-flow !
). Being open to the sump , I'm damn sure sure oil will push up there under
braking and maybe even while being flung around the crank case/ sump with a
rotational crank and rods. The slinger , which is a mild cone shape, then
keeps the oil away from the oil seal . Calling it a slinger is really a
misnomer as it is smooth and with no groove or shape on it to "sling" oil.
For sure it will have a slinging effect as it turns with the crank, but is
only to sling oil away from the seal

As I said , with a duplex sprocket , the just isn't space for the slinger on
the nose of the crank.

Also, in all my x-flow years, I've never had a front oil seal leak. The oil
seal is also easy to replace with the engine in , just take of the pulley
and prize it out, making sure that the new seal goes in all the way AND
SQUARE, to its seat in the front cover. An oil seal at an angle DOES not
seal



There , this is only my humble opinion and again it is not a recommendation.
As they say in the classics- Caveat emptor



Arno









>I am hoping that the slinger was a vestigal reminder of the days of
felt front oil seals and that our age of technology has rendered

them redundant.

Also, I am lazy and I want to drive it on the track tomorrow.





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PostPost by: "Sean Murray" » Sun Apr 17, 2005 11:19 am

Arno,

You have got me curious. Would you care to relate how your timing chain ended up in the sump, what other damage was done, and where you source the duplex chain/sprockets. Btw, I imagine the chain in a x-flow would have a much easier life hauling round one cam instead of three.

Sean Murray


----- Original Message -----
From: Arno Church
To: ***@***.***
Sent: Sunday, April 17, 2005 8:00 AM
Subject: RE: [LotusElan.net] I left out my oil slinger. Doh!


It all came back to me while lying in bed last night

<snip>

The area below the crank spigot is open to the sump below( this is where you
will find the timing chain if it breaks, trust me , I had it on the x-flow !

As I said , with a duplex sprocket , the just isn't space for the slinger on
the nose of the crank.

<snip>

Arno
"Sean Murray"
 

PostPost by: Arno Church » Sun Apr 17, 2005 1:55 pm

Easy, I was into my first season of racing the seven, and after a bearing
freshup I reused the old chain !!!

Unfortunately, it was not a continuous chain , ie it had the link and with
my lack of experience , I put the link with the open end forward. In the
race the car just went very quiet, the link had disconnected

Luckily the X-flow valves are square on the piston and no damage to the
piston or head - fitted new valves in place of the ones that did touch the
pistons

Never re-used a chain since and always used a continuous chain. The next
season I switched to duplex chain

The duplex kit for the x-flow is available from the normal sources Burtons,
Rally Design etc.

There is a chap here in Cape Town that makes duplex kits - with adjustable
cam pulley- he also manufactures mean 45mm individual throttle bodies that
bolts on the standard Weber inlet manifold - I'm running this on the Zetec
that is in the Seven now ( If I had not sold the Elan , I would certainly
have considered this with a mapable electronic ignition- no more fiddling
with jets , and the price of darkness dizzy with its infamous scatter- I've
even donated my Weber books to a friend !!!)

I have never come across a duplex chain kit for the twinc as I do not think
there is space for a double width chain and sprockets

Arno







Arno,

You have got me curious. Would you care to relate how your timing chain
ended up in the sump, what other damage was done, and where you source the
duplex chain/sprockets. Btw, I imagine the chain in a x-flow would have a
much easier life hauling round one cam instead of three.

Sean Murray





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Arno Church
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Joined: 24 Oct 2003

PostPost by: "Sean Murray" » Sun Apr 17, 2005 6:04 pm

Arno,

thanks for the info - I had mistakenly presumed your chain failure and duplex was on a twincam.

Sean
----- Original Message -----
From: Arno Church
To: ***@***.***
Sent: Sunday, April 17, 2005 2:55 PM
Subject: RE: [LotusElan.net] I left out my oil slinger. Doh!


Easy, I was into my first season of racing the seven, and after a bearing
freshup I reused the old chain !!!

Unfortunately, it was not a continuous chain , ie it had the link and with
my lack of experience , I put the link with the open end forward. In the
race the car just went very quiet, the link had disconnected

Luckily the X-flow valves are square on the piston and no damage to the
piston or head - fitted new valves in place of the ones that did touch the
pistons

Never re-used a chain since and always used a continuous chain. The next
season I switched to duplex chain

The duplex kit for the x-flow is available from the normal sources Burtons,
Rally Design etc.

There is a chap here in Cape Town that makes duplex kits - with adjustable
cam pulley- he also manufactures mean 45mm individual throttle bodies that
bolts on the standard Weber inlet manifold - I'm running this on the Zetec
that is in the Seven now ( If I had not sold the Elan , I would certainly
have considered this with a mapable electronic ignition- no more fiddling
with jets , and the price of darkness dizzy with its infamous scatter- I've
even donated my Weber books to a friend !!!)

I have never come across a duplex chain kit for the twinc as I do not think
there is space for a double width chain and sprockets

Arno







Arno,

You have got me curious. Would you care to relate how your timing chain
ended up in the sump, what other damage was done, and where you source the
duplex chain/sprockets. Btw, I imagine the chain in a x-flow would have a
much easier life hauling round one cam instead of three.

Sean Murray





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