Camshaft Oil Seal Help

[lukesaddy 0]

ive just changed the distributor on my car and found it to be full of oil from the camshaft, so i went and bought a seal from peugeot,

 

just wondering, can i change the seal with the camshaft still in situ, possibly by removing the thermostat housing etc (just so i dont haveto remove the cambelt).

 

any advice is much appreciated, thanks

[smithy 1]

as far as i am aware the only seal dizzy end is an O ring on the dizzy to stop oil leaking externally,if there is oil in dizzy then i would say it is a seal inside the dizzy to stop it going inside but cannot be sure.

 

is the seal like a normal cam oil seal if so it will be for timing end?

[lukesaddy 0]

well, when i pulled the dizzy off it had oil in, is this normal ?

 

there is a rubber o ring on the dizzy but the old one was covered in loc-tite too ?

[smithy 1]

dont know if it should be in there or not,but i had mine off last week to remove vac advance and mine had some oil in aswell.

[lukesaddy 0]

is there a camshaft oil seal at the dizzy end of the cam or is it just this o ring that could let oil leak into the dizzy?

 

http://cgi.ebay.co.uk/Peugeot-205-309-GTI-Distributor-Oil-Seal-Dizzy-1-6-1-9-/230492311309?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item35aa698f0d#ht_500wt_922

[smithy 1]

is there a camshaft oil seal at the dizzy end of the cam or is it just this o ring that could let oil leak into the dizzy?

 

http://cgi.ebay.co.uk/Peugeot-205-309-GTI-Distributor-Oil-Seal-Dizzy-1-6-1-9-/230492311309?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item35aa698f0d#ht_500wt_922

 

all you have dizzy end is a gasket between water housing and cylinder head/camshaft cap and the O ring on dizzy,but these only stop external leaks they would not stop oil getting in to Dizzy.

 

The only way the oil could be stopped getting in to dizzy is by having a seal inside dizzy but i do not know if this is the case,at a guess i would say there should be a seal but only way to change it if there is would be renew dizzy with recon/good used.

[lukesaddy 0]

when i said oil getting into dizzy, i mean its getting past camshaft and ending up in the hole where the dizzy slots into in the thermostat housing - nothing in the dizzy cap or anything

[smithy 1]

when i said oil getting into dizzy, i mean its getting past camshaft and ending up in the hole where the dizzy slots into in the thermostat housing - nothing in the dizzy cap or anything

 

thats normal then,oil sits in the recess where dizzy sits inside water housing.

[petert 587]

There is no lip or o-ring type seal on the shaft of an 8V dizzy. When new, the system relies on a spiral thread on the shaft to stop oil entering the dizzy body. As the hole in body wears over time, the clearance between the spiral and the hole increases and it can no longer control the oil. Thus you get a dizzy full of oil. The only way to fix this is to get a guru to machine the body to accept a lip type seal. An o-ring is useless in a dynamic application. Here is a explanation I found:

 

"Spiral-thread Clearance Seal.

 

This form of seal contains a parallel portion of a revolving shaft which fits inside an extended sleeve housing, and an internal spiral (or more accurately, helical) groove is machined inside the sleeve bore (Fig. 25.30). A small clearance is provided between the shaft and the sleeve.

The primary-shaft bearing is lubricated by splashing of oil against the side of the ball bearing. Some of this oil creeps between the inner and outer bearing race tracks and drips into the outer bearing housing and on to the primary shaft. When sufficient oil is trapped between the shaft and the housing-sleeve bore, the revolving shaft develops a pumping action so that oil is further moved along the shaft. When the oil encounters the helix or spiral edge, it is pushed into the spiral rectangular groove. Consequently the existing oil covers the revolving shaft and then drags the oil along the spiral-groove path, back towards the bearing and the drain-hole. Each groove collects a definite quantity of oil, but excess-oil overspill decreases along the shaft.

In some designs, instead of having the spiral groove inside the sleeve, it is machined on the outside of the shaft, and the inside sleeve bore has a smooth surface finish."