 Aha moment >Can You ID the Source of this Gas Leak in These Photos?, Troublesome gas smell traced to engine compartment..Please help |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| c12croft |
 Jun 13 2011, 06:44 PM
Post
#1
|
|
Member  Group: Members Posts: 167 Joined: 24-December 04 From: Long Island, New York Member No.: 3,331  |
There, at the base of the Weber 40's, at the base of the passenger side carb throat was wet with gas. Huh? Engine has not run in two weeks.
Photo #1  and > gas found at base of throat at engine head  Close up just as carb throat attaches to engine head  Could it be a drip from above? (after sitting for two weeks??) Versus the Driver side carb which was dry of gas at same location:  and  There's no constant drip, just wetness at the indicated areas that are giving off the fumes that will get me evicted from inside storage. Larger view, thanks Attached image(s) 
|
   |
 
|
  |
Replies(1 - 9)
| 70_914 |
Jun 13 2011, 10:32 PM
Post
#2
|
|
Member Group: Members Posts: 395 Joined: 4-December 09 From: Roy, WA Member No.: 11,096 Region Association: Pacific Northwest |
I always had trouble getting my Dellortos sealed to the intake manifold, and got gas running down my manifolds. That's what I get for polishing my manifolds...
Did you polish the mating surfaces with sandpaper on glass? |
|
|
|
| c12croft |
Jun 14 2011, 09:44 AM
Post
#3
|
|
Member Group: Members Posts: 167 Joined: 24-December 04 From: Long Island, New York Member No.: 3,331 |
No, I did not polish or mess with the manifolds in any way.
Can anyone advise me as to why there would be gas here without the car running for over two weeks? thanks for your comments. |
|
|
|
| VaccaRabite |
Jun 14 2011, 10:21 AM
Post
#4
|
|
En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Webers have freeze plugs which will weep fuel when they are failing. That could be your issue.
I used to wonder why mine had epoxy on the plugs. A year after I cleaned the carbs and the epoxy came off I noticed the leak. The plugs are on the engine side of the carbs. From there the fuel can dribble down the manifolds to the heads. Zach |
|
|
|
| Cap'n Krusty |
Jun 14 2011, 10:29 AM
Post
#5
|
|
Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
Have you even considered the possibility that the carbs leak? They do that, you know. Or maybe you don't. With astonishing regularity.
The Cap'n |
|
|
|
| ChrisFoley |
Jun 14 2011, 11:14 AM
Post
#6
|
|
I am Tangerine Racing Group: Members Posts: 7,934 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
|
QUOTE(Vacca Rabite @ Jun 14 2011, 12:21 PM)  Webers have freeze plugs which will weep fuel when they are failing. That could be your issue. They're not really freeze plugs but... We routinely take them out and replace them with threaded plugs. I've seen too many fall out and dump fuel all over. |
|
|
|
| r_towle |
Jun 14 2011, 11:17 AM
Post
#7
|
|
Custom Member Group: Members Posts: 24,586 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
|
checked your float settings and needle valves lately?
Dirty needle valve that wont close will just let gas in till it overlflows the bowl... poorly set floats do the same thing, and most floats are wrong that I have seen. Rich |
|
|
|
| John |
Jun 14 2011, 11:21 AM
Post
#8
|
|
member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
QUOTE(Vacca Rabite @ Jun 14 2011, 08:21 AM) Webers have freeze plugs which will weep fuel when they are failing. That could be your issue. I used to wonder why mine had epoxy on the plugs. A year after I cleaned the carbs and the epoxy came off I noticed the leak. The plugs are on the engine side of the carbs. From there the fuel can dribble down the manifolds to the heads. Zach +1 On the small lead plugs in the sides of the float bowls. Had 2 come out at Watkins Glenn about 22 years ago. As luck would have it, the guy in the next garage stall actually had some new ones. Staked the new ones in and problem was solved. |
|
|
|
| VaccaRabite |
Jun 14 2011, 05:36 PM
Post
#9
|
|
En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
QUOTE(Racer Chris @ Jun 14 2011, 12:14 PM) QUOTE(Vacca Rabite @ Jun 14 2011, 12:21 PM) Webers have freeze plugs which will weep fuel when they are failing. That could be your issue. They're not really freeze plugs but... We routinely take them out and replace them with threaded plugs. I've seen too many fall out and dump fuel all over. This is something I need to do to my 40s before I install your linkage. Gould you give me a parts list of things I need to do the job? It is as simple as an NPT tap and the correct sized plug? Zach |
|
|
|
| ChrisFoley |
Jun 14 2011, 06:48 PM
Post
#10
|
|
I am Tangerine Racing Group: Members Posts: 7,934 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
|
QUOTE(Vacca Rabite @ Jun 14 2011, 07:36 PM) This is something I need to do to my 40s before I install your linkage. Gould you give me a parts list of things I need to do the job? It is as simple as an NPT tap and the correct sized plug? Zach Not NPT. 3/8-24 stainless set screws, permanently retained and sealed with red loctite. |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 6th June 2024 - 05:19 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.