Grind Auxiliary Shaft Lobe?

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launieg
Posts: 454
Joined: Tue Mar 25, 2008 4:17 pm
Your car is a: 1981 spider 2000
Location: Duncan, BC, Canada

Grind Auxiliary Shaft Lobe?

Post by launieg »

While I have the engine out and changing heads on this 2 litre (FI), should I grind off the auxiliary shaft lobe? I see a couple of threads where people have done this, to avoid potential future damage, but is there any downside to doing a crude grind? I guess the shaft is not balanced anyway (with that lobe on it), so I suppose that is not an issue, but is there any other downside? Thanks.
Launie
'81 Spider Rolling Restoration
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engineerted
Posts: 531
Joined: Tue Feb 21, 2006 9:57 pm
Your car is a: 1974 124 spider
Location: Farmington Hills, MI

Re: Grind Auxiliary Shaft Lobe?

Post by engineerted »

should I grind off the auxiliary shaft lobe
Cut it off completely and tap and plug the hole.
No down side, shaft spins at 1/2 the crankspeed and diameter is so small balance is a non issue.

Ted
Ted
1978 124 Spider, Complete Restoration
1974 Fiat 124 F Production Race car
narfire
Posts: 3959
Joined: Sat Dec 27, 2008 2:14 am
Your car is a: 1980 124 spider
Location: Naramata B.C.

Re: Grind Auxiliary Shaft Lobe?

Post by narfire »

Hi Launie. I've done that with the 2L engines. Used a cut-off-wheel and then carefully drilled out the oil passage to fit the plug from the end of the lobe you just cut off. Tapped it in with a drift the same size as the inside of the plug.
80 FI spider
72 work in progress
2017 Golf R ( APR Stg. 1)
2018 F350 crew long box
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