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End Gap On Oil Control Wipers


 
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FarmerHR
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Joined: 30 Jul 2008
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PostPosted: Tue Jan 08, 2013 12:40 pm    Post subject: End Gap On Oil Control Wipers Reply to specific post Reply with quote

I am doing an inframe rebuild on a 1948 8N with front mount distributor that has been converted to 12 vols.
I have the sleeves in and was checking the gap on the rings. Both upper and lower compression rings gap measured 0.011 inches. The manual says to look for 0.010 to 0.017. Looks good.
The oil control ring has a wiper on the top and bottom with a corregated spacer inbetween. When I push the wipers in the bore and use a piton to push it down even, the gap measures 0.040 inches. Is this normal ?
What should the wiper gap be ?
Both manuals I have do not say anything about the gap for the wipers. They do give a side clearance.
Thank ,You for any help you can provide.
 
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JCinKY
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Joined: 01 Aug 2012
Posts: 857
Location: Sadieville KY

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PostPosted: Tue Jan 08, 2013 1:38 pm    Post subject: Re: End Gap On Oil Control Wipers Reply to specific post Reply with quote

Farmerhr wrote:
(quoted from post at 13:40:59 01/08/13) I am doing an inframe rebuild on a 1948 8N with front mount distributor that has been converted to 12 vols.
I have the sleeves in and was checking the gap on the rings. Both upper and lower compression rings gap measured 0.011 inches. The manual says to look for 0.010 to 0.017. Looks good.
The oil control ring has a wiper on the top and bottom with a corregated spacer inbetween. When I push the wipers in the bore and use a piton to push it down even, the gap measures 0.040 inches. Is this normal ?
What should the wiper gap be ?
Both manuals I have do not say anything about the gap for the wipers. They do give a side clearance.
Thank ,You for any help you can provide.


40 thou seems out if whack. Make sure the spacers are turned the correct way. They have a lip on them that go on the inside of the ring gap. The wipers "lock" the spacer in by riding on top of the lip.
 
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awhtx
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Joined: 16 Jan 2002
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Location: Lampasas, TX

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PostPosted: Tue Jan 08, 2013 6:14 pm    Post subject: Re: End Gap On Oil Control Wipers Reply to specific post Reply with quote

I've never rebuilt an N engine before but that doesn't sound unreasonable for a wiper ring to me. I've never even heard of anyone measuring the gap on the wipers.
 
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Ultradog MN
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Joined: 22 Apr 2001
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Location: Twin Cities

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PostPosted: Wed Jan 09, 2013 2:46 am    Post subject: Re: End Gap On Oil Control Wipers Reply to specific post Reply with quote

Alan,
I tend to agree.
Since they have nothing to do with compression I doubt the end gap matters much.
 
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mhb@ufe
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Joined: 05 Mar 2009
Posts: 1825
Location: Jefferson Maine

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PostPosted: Wed Jan 09, 2013 1:56 pm    Post subject: Re: End Gap On Oil Control Wipers Reply to specific post Reply with quote

In the reprint service manual I have they list all the rings, top , center and oil as .010-.015

Mark
 
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Ken(Ark)
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PostPosted: Wed Jan 09, 2013 8:29 pm    Post subject: Re: End Gap On Oil Control Wipers Reply to specific post Reply with quote

Ultradog MN wrote:
(quoted from post at 06:46:05 01/09/13) Alan,
I tend to agree.
Since they have nothing to do with compression I doubt the end gap matters much.


Ditto , they are not pressurized .

KB Pistons / oil ring gap
 
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