 Mystery oil leak |
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| Mayne |
 Mar 12 2017, 09:40 PM
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#1
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Member  Group: Members Posts: 254 Joined: 28-February 17 From: NM Member No.: 20,880 Region Association: None  |
Hi everyone, I picked up a 75 914 last summer and have finally gotten it running well enough to drive (which I want to do!). The problem is, a substantial oil leak that I thought I'd fixed is still there. Previously, it would spray oil from the lower drivers side at revs above idle. Not finding a clear source, I dropped the motor and resealed the oil pump, which really seemed like the issue. Motor back in now and the leak is the same. It seems to rev or crankcase pressure related, but now I'm thinking pushrod tubes or valve cover gasket. Any thoughts would be much appreciated.
I'll give a proper introduction with some photos soon. Cheers! |
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| Mayne |
Mar 13 2017, 10:19 AM
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#2
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Member Group: Members Posts: 254 Joined: 28-February 17 From: NM Member No.: 20,880 Region Association: None |
Thanks for the suggestions. The motor will come back out and I will check and fix everything I can. I plan to start a project thread, but here are a few photos:
In the shop: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421966.1.jpg) Engine back in with rebuilt Webers: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421967.2.jpg) First drive with my brother's 69 911: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421967.3.jpg) Looking good with my 951 and 986: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421967.4.jpg) (IMG:style_emoticons/default/beerchug.gif) |
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| bandjoey |
Mar 13 2017, 07:27 PM
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#3
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bandjoey Group: Members Posts: 4,926 Joined: 26-September 07 From: Bedford Tx Member No.: 8,156 Region Association: Southwest Region |
QUOTE(Mayne @ Mar 13 2017, 11:19 AM)  Thanks for the suggestions. The motor will come back out and I will check and fix everything I can. I plan to start a project thread, but here are a few photos: In the shop: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421966.1.jpg) Engine back in with rebuilt Webers: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421967.2.jpg) First drive with my brother's 69 911: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421967.3.jpg) Looking good with my 951 and 986: (IMG:http://www.914world.com/bbs2/uploads_offsite/i1322.photobucket.com-20880-1489421967.4.jpg) (IMG:style_emoticons/default/beerchug.gif) The answer clue is the oil breather plumbing on top of the carb air cleaner. Oil vaper hoses from both heads drain into the carbs or a breather box. If the hose is off one or both it'll blow oil everywhere. Ask people following me how I know. (IMG:style_emoticons/default/headbang.gif) |
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| Mayne |
Mar 14 2017, 09:04 AM
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#4
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Member Group: Members Posts: 254 Joined: 28-February 17 From: NM Member No.: 20,880 Region Association: None |
[/quote] The answer clue is the oil breather plumbing on top of the carb air cleaner. Oil vaper hoses from both heads drain into the carbs or a breather box. If the hose is off one or both it'll blow oil everywhere. Ask people following me how I know. (IMG:style_emoticons/default/headbang.gif) [/quote] I'll check into that as well, though there is no oil leaking on the top of the engine. |
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Posts in this topic
Mayne Mystery oil leak Mar 12 2017, 09:40 PM
ConeDodger If you dropped the motor, you should have complete... Mar 12 2017, 10:06 PM
Mayne
If you dropped the motor, you should have complet... Mar 13 2017, 10:08 AM Dave_Darling Do you have a thermostat? The pulley wheel for th... Mar 12 2017, 10:47 PM r_towle
Do you have a thermostat? The pulley wheel for t... Mar 13 2017, 11:17 AM SirAndy Do you have a thermostat? The pulley wheel for th... Mar 13 2017, 12:50 PM The Cabinetmaker :ttiwwp: Mar 12 2017, 10:50 PM rgalla9146 Spraying out ?
Is your crankcase ventilation... Mar 13 2017, 05:39 AM Dave_Darling Seriously--take a look at the driver's side of... Mar 13 2017, 11:34 AM Mayne
Seriously--take a look at the driver's side o... Mar 13 2017, 12:09 PM porschetub Nice original looking car :beer1: ,I'am presu... Mar 13 2017, 11:37 AM Shadowfax What about the oil cooler seals? Mar 13 2017, 12:23 PM brant as far as spraying goes
I've also had the oil ... Mar 13 2017, 12:34 PM sdoolin That is great information about the Tstat roller g... Mar 13 2017, 12:37 PM rgalla9146 If your crankcase vents have strong pressure you h... Mar 14 2017, 08:02 AM Mayne THANK YOU!! Oil leak fixed.
Missing thermo... Mar 18 2017, 11:59 AM rgalla9146 Excellent !
Wish I could say I helped........ Mar 18 2017, 01:13 PM |
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