Lotus Elan

Mystery hole in firewall

PostPost by: fattogatto » Mon Dec 02, 2019 3:56 pm

I have a 1967 baby Elan S3 RHD undergoing rebuild. I have found a strange hole in the upper corner of the gearbox tunnel (near side - on left as facing the car from the front) just as the tunnel transitions from vertical to horizontal. It has a rubber grommet in it. In searching the pre-dismantle pictures I can find nothing protruding from that hole. Inserting a screwdriver I am met with instant resistance. I believe it is hitting the heater plenum.

Is there something I'm missing or is this possibly an addition by the PO?

Thanks,
Charlie Warner
Fatto Gatto Racing
User avatar
fattogatto
Second Gear
Second Gear
 
Posts: 216
Joined: 23 Sep 2015
Location: Memphis, TN

PostPost by: 661 » Mon Dec 02, 2019 4:06 pm

Plenum drain hole I believe.
I think one of Paul H's videos will show this quite clearly.
Graeme
S4 SE
S2 GTS
Peterson JPS Exige
User avatar
661
Fourth Gear
Fourth Gear
 
Posts: 688
Joined: 29 Mar 2012
Location: East Sussex

PostPost by: gjz30075 » Mon Dec 02, 2019 4:13 pm

Right, the plenum 'nipple' fits in it, for drainage
Greg Z
45/0243K Sprint
36/5727 pre airflow coupe
User avatar
gjz30075
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 2830
Joined: 12 Sep 2003
Location: Roswell, Georgia, USA

PostPost by: fattogatto » Mon Dec 02, 2019 5:12 pm

Thanks to all.
Charlie Warner
Fatto Gatto Racing
User avatar
fattogatto
Second Gear
Second Gear
 
Posts: 216
Joined: 23 Sep 2015
Location: Memphis, TN

PostPost by: alan.barker » Mon Dec 02, 2019 5:24 pm

If you mean on the driver's side from inside there is a hole with rubber bung forward position in tunnel. This helps to access to undo screws on Fuel Pump.
Alan
Alan.b Brittany 1972 elan sprint fhc Lagoon Blue 0460E
alan.barker
Coveted Fifth Gear
Coveted Fifth Gear
 
Posts: 1726
Joined: 06 Dec 2008
Location: BRITTANY FRANCE

PostPost by: baileyman » Tue Dec 03, 2019 1:02 am

My plenum nipple was dry rotted. Not trusting it's design I found an interesting workaround. It's a length of bicycle inner tube with the end inserted in a 1" ring, then turned back on itself leaving the ring surrounded. Then threading the tube through the drain from the top the ring stops it nicely and it dangles past the transmission. Soon I will trim the end. The ring structure should not impede drainage as it is low.

John
baileyman
Second Gear
Second Gear
 
Posts: 136
Joined: 17 Aug 2017
Location: Boston

Total Online:

Users browsing this forum: No registered users and 6 guests