 72 Vacuum hose diagram, Heat exchanger torque spec |
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| 914bub |
 Jun 26 2014, 10:52 PM
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#1
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Member  Group: Members Posts: 433 Joined: 16-August 13 From: Modesto CA. Member No.: 16,260 Region Association: None  |
So I've searched and searched online and I can't find an engine vacuum hose diagram for my 72 914, (1.7). If anybody can help me out I would greatly appreciate it.
I am also looking for a torque spec for the nuts that attach the heat exchangers to the heads. Thanks in advance! Bub |
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| type47 |
Jun 27 2014, 04:39 AM
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#2
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
QUOTE(914bub @ Jun 26 2014, 08:52 PM)  ... torque spec for the nuts that attach the heat exchangers to the heads. 18 ft-lbs (number I read from Jake awhile ago) |
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| cary |
Jun 27 2014, 06:56 AM
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#3
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Advanced Member Group: Members Posts: 3,900 Joined: 26-January 04 From: Sherwood Oregon Member No.: 1,608 Region Association: Pacific Northwest 
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| 914bub |
Jun 27 2014, 01:19 PM
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#4
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Member Group: Members Posts: 433 Joined: 16-August 13 From: Modesto CA. Member No.: 16,260 Region Association: None |
QUOTE(cary @ Jun 27 2014, 05:56 AM) Thanks. I've got a copy of that particular diagram printed out already but I thought there was a hose or two going to a fuel pressure regulator or ??? that is mounted near the MPS? |
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| cwpeden |
Jun 27 2014, 01:44 PM
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#5
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Great White North, huh? Group: Members Posts: 916 Joined: 20-August 06 From: Victoria BC Member No.: 6,693 Region Association: Canada |
QUOTE(914bub @ Jun 27 2014, 12:19 PM) QUOTE(cary @ Jun 27 2014, 05:56 AM) Thanks. I've got a copy of that particular diagram printed out already but I thought there was a hose or two going to a fuel pressure regulator or ??? that is mounted near the MPS? Sounds like the decel valve. See here in 2.0L format. http://www.pelicanparts.com/914/technical_...4_20FI_diag.htm |
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| Dave_Darling |
Jun 27 2014, 03:14 PM
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#6
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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The two large hoses to the decel valve may be swapped in that diagram, BTW...
--DD |
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| Cap'n Krusty |
Jun 27 2014, 03:25 PM
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#7
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Those 2 hoses are of different diameters, IIRC, so there shouldn't be any confusion. Did the '72s even have a decel valve? If so, where was the tap for the small hose? The '72 was a one year only version and had a temperature controlled vacuum switch in the air cleaner for the heat riser. That tap was in the rubber hose between the AAR and the intake plenum.
The Cap'n |
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| JeffBowlsby |
Jun 28 2014, 08:09 AM
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#8
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914 Wiring Harnesses Group: Members Posts: 8,513 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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The 1972 Service and Training Manual clearly depicts the decel valve as new for 1972.
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| rhodyguy |
Jun 28 2014, 08:23 AM
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#9
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,082 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
agreed on the 18#. torque them down in a few stages, increasing the value, in an X type pattern as to not bind and build in a leak.
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| Cap'n Krusty |
Jun 28 2014, 09:43 AM
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#10
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
QUOTE(Jeff Bowlsby @ Jun 28 2014, 07:09 AM) The 1972 Service and Training Manual clearly depicts the decel valve as new for 1972. OK. The manual has a better memory than I do after 42 years. Where's the vacuum tap for the 3.5 mm hose? The Cap'n |
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| JeffBowlsby |
Jun 28 2014, 10:06 AM
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#11
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914 Wiring Harnesses Group: Members Posts: 8,513 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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QUOTE(Cap'n Krusty @ Jun 28 2014, 08:43 AM) QUOTE(Jeff Bowlsby @ Jun 28 2014, 07:09 AM) The 1972 Service and Training Manual clearly depicts the decel valve as new for 1972. OK. The manual has a better memory than I do after 42 years. Where's the vacuum tap for the 3.5 mm hose? The Cap'n This is the page from the '72 S&T manual...its probably more diagrammatic than anything. Attached image(s) 
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| Cap'n Krusty |
Jun 28 2014, 10:50 AM
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#12
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
AHA! That's NOT for a '72, at least the ones sold in CA (and probably the US, too). Note the lack of vacuum plumbing for the thermostatic air cleaner, which was installed ONLY on the '72s. There's a date on the S&T manual. What is it?
The Cap'n |
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| JeffBowlsby |
Jun 28 2014, 10:58 AM
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#13
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914 Wiring Harnesses Group: Members Posts: 8,513 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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QUOTE(Cap'n Krusty @ Jun 28 2014, 09:50 AM) AHA! That's NOT for a '72, at least the ones sold in CA (and probably the US, too). Note the lack of vacuum plumbing for the thermostatic air cleaner, which was installed ONLY on the '72s. There's a date on the S&T manual. What is it? The Cap'n Here is the whole manual...it has that funky thermostatic thingy in it too... Attached File(s) 
1972_ServiceInformation.pdf ( 912.63k )
Number of downloads: 24 |
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| Cap'n Krusty |
Jun 28 2014, 03:07 PM
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#14
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
It's interesting the diagram for the TAC is the one used for a Type 1. We still don't know where that pesky tap goes. Thinking about it, perhaps the tee is the tap for that, and there's an extra tap in the plenum. Maybe Bruce Stone has one to look at.
The Cap'n |
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