 Push rod tubes, Are the late and early different? |
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| worn |
 Mar 28 2014, 02:41 PM
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#1
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can't remember  Group: Members Posts: 3,166 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest 
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I am remembering a tread sometime back that suggested ther might be different sized push rod oil return tubes. I as be causr I put tubes from a 1.7 onto a 2.0 build. The case is a match but the heads are new. Why yes, I am having leaks. Excuse me, I will clean that up...
Any help? |
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| bdstone914 |
Mar 28 2014, 02:47 PM
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bdstone914 Group: Members Posts: 4,539 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Yes there are two sizes. Put together a 72 1.7 and most of the tubes I had were too big. Went through a bucket of them to find ones that fit. Not sure if that is your problem of small tubes in big holes.
We had the problem at the heads. |
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| Dave_Darling |
Mar 28 2014, 03:56 PM
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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The early 1.7 heads had smaller bores for the push rod tubes. So the outer end (only!) of the tube was smaller. Later 1.7s, and all 1.8s and 2.0s, had the larger size outer ends.
I'm a bit surprised that a 72 had the small-hole heads; I had thought it was confined to 1970 and maybe some of 1971. The inboard ends were all the same size. --DD |
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| bdstone914 |
Mar 28 2014, 05:32 PM
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#4
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bdstone914 Group: Members Posts: 4,539 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
QUOTE(Dave_Darling @ Mar 28 2014, 02:56 PM)  The early 1.7 heads had smaller bores for the push rod tubes. So the outer end (only!) of the tube was smaller. Later 1.7s, and all 1.8s and 2.0s, had the larger size outer ends. I'm a bit surprised that a 72 had the small-hole heads; I had thought it was confined to 1970 and maybe some of 1971. The inboard ends were all the same size. --DD We had two engines and the car was a 72. Can't confirm the heads were 72. |
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| worn |
Mar 28 2014, 09:10 PM
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#5
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can't remember Group: Members Posts: 3,166 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest
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QUOTE(Dave_Darling @ Mar 28 2014, 01:56 PM) The early 1.7 heads had smaller bores for the push rod tubes. So the outer end (only!) of the tube was smaller. Later 1.7s, and all 1.8s and 2.0s, had the larger size outer ends. I'm a bit surprised that a 72 had the small-hole heads; I had thought it was confined to 1970 and maybe some of 1971. The inboard ends were all the same size. --DD Thanks to both of you. Ibet I get better results if I buy new tubes. |
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| ChrisFoley |
Mar 29 2014, 09:35 AM
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I am Tangerine Racing Group: Members Posts: 7,935 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(worn @ Mar 28 2014, 10:10 PM) Ibet I get better results if I buy new tubes. I'm getting ready to produce 30 sets of my new stainless PR tubes. They should be available in 2-4 weeks. I also have several sets of new stock PR tubes which I am happy to sell off now. |
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| lonewolfe |
Mar 29 2014, 01:48 PM
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#7
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Senior Member Group: Members Posts: 819 Joined: 12-September 11 From: Oakland, CA Member No.: 13,549 Region Association: Northern California |
QUOTE(Racer Chris @ Mar 29 2014, 08:35 AM) QUOTE(worn @ Mar 28 2014, 10:10 PM) Ibet I get better results if I buy new tubes. I'm getting ready to produce 30 sets of my new stainless PR tubes. They should be available in 2-4 weeks. I also have several sets of new stock PR tubes which I am happy to sell off now. Hey Chris how much will a set of the stainless PR tubes cost? I may be interested in a set. |
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| stugray |
Mar 29 2014, 06:05 PM
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#8
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Anyone know how to tell the two kinds apart?
I assume measuring each end's diameter without the gaskets will work. I just found an old set and cleaned them, but I dont know if they are 1.7 or 1.8/2.0. The ones I have just measured 30mm & 26.7mm |
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| jaxdream |
Mar 30 2014, 07:34 AM
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#9
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Senior Member Group: Members Posts: 974 Joined: 8-July 08 From: North Central Tennessee Member No.: 9,270 Region Association: South East States |
That would be a helpful thing to know what the diameters are for the early vs the late . Anybody have these specs to share ????
Jack |
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