Weber 38 Dgas

Moderators: scimjim, Lukeyboy46, erikscimitardemon, Roger Pennington, philhoward

Post Reply
chips01
Posts: 55
Joined: Sat Aug 25, 2018 7:22 pm
Has thanked: 57 times

Weber 38 Dgas

Post by chips01 » Mon Mar 04, 2019 6:15 pm

I have a question about the 38 Dgas installed on my engine. There were many missing parts on the engine and I believe there is a missing fitting from the carb.

There is a fitting tube spigot above the accelerator gearing and below the brass coloured blank, as per photo, and I do not know if it should be blanked off, left open or connected to another part.

I have installed electric fuel pump and I was wondering if there is excess fuel flow to the carb does the excess fuel automatically return to the tank?

Can anyone help please.

Many thanks,
Attachments
IMG_3426.JPG
IMG_3426.JPG (201.33 KiB) Viewed 1037 times



User avatar
peter freeman
RSSOC Member
Posts: 9717
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 9 times
Been thanked: 339 times
Contact:

Weber 38 Dgas

Post by peter freeman » Mon Mar 04, 2019 6:32 pm

Blanked off. There should be a return pipe to the tank on the 6s
Last edited by peter freeman on Mon Mar 04, 2019 6:33 pm, edited 1 time in total.



User avatar
scimjim
RSSOC Member
Posts: 37039
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 122 times
Been thanked: 908 times

Weber 38 Dgas

Post by scimjim » Mon Mar 04, 2019 6:33 pm

I think some air filters use that air tapping - blank off if you don’t need it.

The electric pump will stop pumping when the float chamber is full and the valve shuts but a 6 series would normally have a restricted return line to the tank.


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

roymck
RSSOC Member
Posts: 1081
Joined: Tue Mar 24, 2009 11:33 am
Location: Dorking Surrey
Has thanked: 15 times
Been thanked: 24 times

Weber 38 Dgas

Post by roymck » Mon Mar 04, 2019 6:37 pm

My Coupe appears to have a factory fitted return back to the tank , well at least it looks like it’s always been there .



User avatar
scimjim
RSSOC Member
Posts: 37039
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 122 times
Been thanked: 908 times

Weber 38 Dgas

Post by scimjim » Mon Mar 04, 2019 6:51 pm

Is the tank original? I think all later carbs have the casting but not necessarily drilled and fitted with brass pipe?


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

roymck
RSSOC Member
Posts: 1081
Joined: Tue Mar 24, 2009 11:33 am
Location: Dorking Surrey
Has thanked: 15 times
Been thanked: 24 times

Weber 38 Dgas

Post by roymck » Mon Mar 04, 2019 6:59 pm

20B71FFD-0E08-4494-8191-3E673C65D669.jpeg
20B71FFD-0E08-4494-8191-3E673C65D669.jpeg (269.02 KiB) Viewed 1007 times
Tank looks original , it’s got a 40DFAV with a return and it returns following the feed pipe down the chassis . Both in Black poly tube and it returns into the tank via a tube in the tank filler neck . You can just see the return on this picture .
Last edited by roymck on Mon Mar 04, 2019 7:02 pm, edited 1 time in total.



User avatar
scimjim
RSSOC Member
Posts: 37039
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 122 times
Been thanked: 908 times

Weber 38 Dgas

Post by scimjim » Mon Mar 04, 2019 7:00 pm

Ah, original 40, not 38 :D

This is on a 6 series.


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

User avatar
Roger Pennington
RSSOC Member
Posts: 19768
Joined: Tue Aug 29, 2006 9:43 pm
Has thanked: 134 times
Been thanked: 496 times

Weber 38 Dgas

Post by Roger Pennington » Mon Mar 04, 2019 7:02 pm

Yes, that vacuum takeoff is, as Jim says for the later-type air cleaner used on Se6as, which had an automatic warm air flap in the intake trunk. If you don't have that kind of air filter, then you can blank it off.

I believe your car is a '77 Se6a? If so there is a good chance it will have a fuel return, if so it'll be on the other side of the carb nxt to the fuel intake.


....Roger

RSSOC member (since 1982)
- - - - - - - - - - - - - - - - -
Image

"Condition can be bought at any time; Originality, once lost, is gone forever" - Doug Nye

chips01
Posts: 55
Joined: Sat Aug 25, 2018 7:22 pm
Has thanked: 57 times

Weber 38 Dgas

Post by chips01 » Mon Mar 04, 2019 7:04 pm

Many thanks for all the replies, much appreciated.

Will be blanked off. The tank, I believe, is original and the return piping is complete. Feeling a lot happier now.

This car is fighting every step of the way but she will be a beauty when finished.

Best wishes to you all,

Keith



roymck
RSSOC Member
Posts: 1081
Joined: Tue Mar 24, 2009 11:33 am
Location: Dorking Surrey
Has thanked: 15 times
Been thanked: 24 times

Weber 38 Dgas

Post by roymck » Mon Mar 04, 2019 7:04 pm

Yes but just wanted to point out it’s not just 6 series cars that have a return .



User avatar
scimjim
RSSOC Member
Posts: 37039
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 122 times
Been thanked: 908 times

Weber 38 Dgas

Post by scimjim » Mon Mar 04, 2019 8:20 pm

roymck wrote:
Mon Mar 04, 2019 7:04 pm
Yes but just wanted to point out it’s not just 6 series cars that have a return .
yep -small sports do too :D


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

User avatar
giddo
RSSOC Member
Posts: 38
Joined: Wed Aug 02, 2017 10:24 am
Location: Fordingbridge, Hampshire
Has thanked: 3 times
Been thanked: 2 times

Weber 38 Dgas

Post by giddo » Thu Mar 14, 2019 8:18 am

My thanks to all contributors above, useful reading for me. I’d better go & look at my carb.


Mike Giddens
The frog ? I live in a village called Frogham

Post Reply

Return to “Se6/6a/6b/GTC”