Click here to return to the home page.
Classic Morgans
Who's Online Now
1 members (JMcL), 195 guests, and 41 robots.
Key: Admin, Global Mod, Mod
Top Posters(30 Days)
+8Rich 96
Luddite 54
Newest Members
phenompilot52, Orjan, John Courtney, vince Indiana US, Garage Andreas
9,635 Registered Users
Newest Topics
small hose from air cleaner - 1989
by Carbuilder - 12/09/26 04:50 PM
New member in NYC
by SEG - 12/09/26 04:13 PM
Door card removal ?
by Pittsartist - 12/09/26 11:35 AM
New to me plus 4
by SailingTom2 - 12/09/26 06:24 AM
Hot Bonnet
by Carbuilder - 11/09/26 11:21 PM
morgan supersport 357 miles
by Nick_H - 09/09/26 09:13 PM
M3W Treffen 2027
by Laurens - 09/09/26 08:12 PM
Latest Photos
New to me 95 plus 4 daily driver
New to me 95 plus 4 daily driver
by SailingTom2, September 12
1989 Morgan Plus 4 in Ontario, Canada
1989 Morgan Plus 4 in Ontario, Canada
by Carbuilder, September 5
First anniversary of Plus 4
First anniversary of Plus 4
by Strathaven, September 5
Wales
Wales
by Joske Vermeule, September 1
Engine/Gearbox Separator CX Models
Engine/Gearbox Separator CX Models
by number thirteen, August 30
Forum Statistics
Forums39
Topics49,904
Posts838,083
Members9,635
Most Online1,063
Jun 14th, 2026
Today's Birthdays
There are no members with birthdays on this day.
Previous Thread
Next Thread
Print Thread
#734474 27/02/22 09:03 AM
Joined: Aug 2020
Posts: 502
Leroy Offline OP
Talk Morgan Regular
OP Offline
Talk Morgan Regular
Joined: Aug 2020
Posts: 502
Can anyone identify the below part. I'm guessing some kind of. Under tray, but looks a different shape to. The design I've seen made by Dave W. And the sides look too parallel. The curved end has a rivited in section. With the body colour, which appears broken off around the curved section.

[Linked Image]


2004 Series 1 Roadster
Joined: Dec 2008
Posts: 22,371
Likes: 354
Roadster Guru
Member of the Inner Circle
Offline
Roadster Guru
Member of the Inner Circle
Joined: Dec 2008
Posts: 22,371
Likes: 354
Those holes look like they may align with over-rider brackets, and the front looks to be the same shape as the number plate box for Trads with, (or without) over-riders


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
Joined: Jul 2007
Posts: 27,840
Likes: 764
Member of the Inner Circle
Offline
Member of the Inner Circle
Joined: Jul 2007
Posts: 27,840
Likes: 764
I'm wondering if it is an undertray to improve rad air flow for a +8


JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
Joined: May 2010
Posts: 9,554
Likes: 134
S
Needs to Get Out More!
Offline
Needs to Get Out More!
S
Joined: May 2010
Posts: 9,554
Likes: 134
I have a sort of undertray on my Plus8. It doubles as a numberplate holder then folds back to form an under tray that goes back past the bottom of the rad. It is fitted to the front over rider extensions from the chassis. It actually blocks air from getting to the bottom of the rad.
I’ve never been convinced that it helps airflow in any way. My fan has always been coming on preventing overheating. However the system seems very sensitive to reduced airflow when in slow traffic. I have tried a jury rigged duct to feed air to the bottom of the rad that seems blanked off by the whole design. Enough improvement to warrant more experiments. Morgan grills are not the best for providing good airflow to the rad.
Recent drives are showing a coolant gauge reading of 80deg with slower rise from cold and lesser increased reading when in slower traffic/ waiting at lights etc. This is the norm for winter. Summer, with higher ambient temperatures results in normal running between 85 and 90deg with faster warm up from cold and when in slow traffic/lots of stop start driving.
I’m going to retry extra ducting to reduce average coolant temp to reduce fan cut-ins or even remove the numberplate/undertray and stick numbers on the wing.
Just had a thought.......cut the undertray and fit a mesh replacement section. Protects rad from debris and lets air up.
.

Last edited by sospan; 27/02/22 07:20 PM.

Plus Four MY23 Furka Rouge
Joined: Aug 2020
Posts: 502
Leroy Offline OP
Talk Morgan Regular
OP Offline
Talk Morgan Regular
Joined: Aug 2020
Posts: 502
Originally Posted by sospan
I have a sort of undertray on my Plus8. It doubles as a numberplate holder then folds back to form an under tray that goes back past the bottom of the rad. It is fitted to the front over rider extensions from the chassis. It actually blocks air from getting to the bottom of the rad.
I’ve never been convinced that it helps airflow in any way. My fan has always been coming on preventing overheating. However the system seems very sensitive to reduced airflow when in slow traffic. I have tried a jury rigged duct to feed air to the bottom of the rad that seems blanked off by the whole design. Enough improvement to warrant more experiments. Morgan grills are not the best for providing good airflow to the rad.
Recent drives are showing a coolant gauge reading of 80deg with slower rise from cold and lesser increased reading when in slower traffic/ waiting at lights etc. This is the norm for winter. Summer, with higher ambient temperatures results in normal running between 85 and 90deg with faster warm up from cold and when in slow traffic/lots of stop start driving.
I’m going to retry extra ducting to reduce average coolant temp to reduce fan cut-ins or even remove the numberplate/undertray and stick numbers on the wing.
Just had a thought.......cut the undertray and fit a mesh replacement section. Protects rad from debris and lets air up.
.


I'm pretty sure it's as you Dave and John describe, and makes sense. I get that it might not help reduce rad temperatures, but feel the underneath of the Morgan is very exposed so will look to secure this in position. Thanks guys.


2004 Series 1 Roadster
Joined: Aug 2020
Posts: 502
Leroy Offline OP
Talk Morgan Regular
OP Offline
Talk Morgan Regular
Joined: Aug 2020
Posts: 502
[Linked Image]

As Dave W and John suggested, it was part of the undertray and number plate box. Once glue is set I'll re-install it. Looks like it will protect quite a bit of the underside.


2004 Series 1 Roadster
Joined: Aug 2020
Posts: 502
Leroy Offline OP
Talk Morgan Regular
OP Offline
Talk Morgan Regular
Joined: Aug 2020
Posts: 502
All fitted, and I'm really pleased with the result.the front end seems really protected.


2004 Series 1 Roadster
Joined: Dec 2008
Posts: 22,371
Likes: 354
Roadster Guru
Member of the Inner Circle
Offline
Roadster Guru
Member of the Inner Circle
Joined: Dec 2008
Posts: 22,371
Likes: 354
An undertray seems to improve airflow through the cowl. I've had one on my Roadster for years now, and the bonus is it keeps road grime from collecting on the rack and crosshead.


DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
Joined: Aug 2020
Posts: 502
Leroy Offline OP
Talk Morgan Regular
OP Offline
Talk Morgan Regular
Joined: Aug 2020
Posts: 502
Originally Posted by DaveW
An undertray seems to improve airflow through the cowl. I've had one on my Roadster for years now, and the bonus is it keeps road grime from collecting on the rack and crosshead.

The main thing for me is keeping the grime away from the rack and crosshead. It just looked so exposed beforehand. I removed the I've riders to help getting the bolts in, and found out how fiddly it is to refit the lower bolts 😖


2004 Series 1 Roadster

Moderated by  TalkMorgan 

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5