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4CV Rebuild Files and Heaters


This page contains information on some things to look for in 4CVs/750s (especially P.O.T.'S - previous owner tricks) and additional files on Heaters and Optional Fittings. Data is subject to ongoing additions and changes. As a note, the 4CV was marketed in the UK under the names 750 and 760s although the build cards all say 4CV for the sake of confusion both terms have been used here as the name 4CV is more common. Much research has been done into the cars themselves (September 2011 Renotes) but the lack of records may mean the actualities of each car is never known. Not helped by early pres photos being left hand drive French cars. Mine for example has over riders and the French intakes on the rear wings as well as a RNUR badge on the front, all these could easily have been changed from the expected type. But the press photo for October 1955 in the advert (although not clear) shows all of these on it. Also the black and white photo from the 70s shows these.

History shows though that up until mid 1956 most Right hand drive UK based cars came and were built via Acton or were imported by their owners from abroad as Right Hand drive (in which case were 4CVs) after this they were built in France but still marketed as 750s so inaccuracies and amendments are always welcome.

February 1951 750cc Class Le Mans. Actually a 4CV but in this UK publication called a 750 October 1955 Note this one is a right Hand Drive Model Shown and reference to the Ferlec (from 1954) Blow up of the 1955 Renault showing later Diamond Badge Close up of 1955 Model
1955 Model in this case a Left Hand Drive 1954 Model Shown, this time a Right Hand Drive with the round grill badge 

My 750 Built late 1955 (October) on the build card in France and first registered 1956 and now restored. The original colour was listed as blue and there are a number on conflicting items suggesting this may have been mettalic but also Matt. The last colour was a 21 Savanna Blue.


Sofica Heaters
The Sofica fitting was both a standard fitting on some Renaults and also an aftermarket fitting. Taking water from the cooling system to supply a separate "radiator" which is used as a heat exchanger - similar to a lot of British Cars of the periods which had Smiths Heaters. The hot air is fed into the car via panel cuts. Watch for cars fitted with these where the seller has it running in the summer as you test drive it. Like all heaters it can be used to "dump" heat from an engine that's overheating, a particular (even original) problem of a lot of rear engine Renaults and any form of "performance enhancing" may have caused the engine to heat even more. The car should still run normal when it is switched off (although Dauphines at least often overheat. Remember these cars are built for the French Market but there WERE alterations for the UK Market. 

Engine Bay (French Built 4CV with optional Sofica Heater)

Sofica Fitting Instructions - A similar installation was used of the Floride.

This is a heater in a 1961 Floride

And a spare one found under the bonnet of a recent acquisition. These heaters are fairly common on UK models and have the advantage that they don't blow warm (damp) air through the insides of the sills as the original air flow followed.

The following is an on going translation from a French Publication.

COLLECTION OF DOCUMENTS COMPILED BEFORE ASSEMBLY (reference SAPRAR manual of the time):

Reference

Description

Qty

Where to find these parts if missing

8 539 675

Heater Matrix and Mounting Plate

1

In the basics (the turbine is identical on the Dauphine, but not the plate nor the Sofica radiator)

8 526 966

Durite (Durite manufacture electronic terminals switches etc) SOFICA superieure

1

Available new from Special Suppliers

8 526 803

Durite SOFICA inferieure

1

Available new from Special Suppliers

8 526 318

Colliers de serrage

4

grande surface aurtomobile

8 526 805

Durite avec piquage en T (pompe-radiateur)

1

Available new from Special Suppliers

8 527 922

Durite sortie culasse avec piquage en T

1

Available new from Special Suppliers

8 527 091

Durite superieure (thermostat radiateur)

1

Available new from Special Suppliers

8 526 320

Colliers de serrage

4

Large Variety of Cars

8 540 208

Thermostat

1

Difficilement trouvable (remplacer par un tube en cuivre de section et longueur approprie en attendant).

8 527 096

Tube d'air principal (sofica buse de chauffage)

1

voir materiel de climatisation

8 526 323

Colliers de serrage larges

2

magasin de bricolage

8 527 037

Buse d'air ovale sous le siège arrière

1

Pas facile à trouver (la buse d'origine est trop petite). c'est la pièce la plus rare à trouver. Il y en a eu quelques unes de refabriquees chez RCA/Maillefaud.

8 527 097

Tube d'air desembuage 600 mm

1

gaine alu de hotte de cuisine (diam 52 mm)

8 527 098

Tube d'air desembuage 1200 mm

1

gaine alu de hotte de cuisine (diam 52 mm)

6 048 967

Colliers de fixation sur cloison moteur

2

colliers rilsan et pattes de fixation

8 213 270

Carton droit de radiateur

1

A faire sur mesure en isorel à partir des côtes du carton d'origine en percant le passage rectangulaire pour l'air dans le radiateur SOFICA.

6 060 286

Equerre de retenu du carton

1

à faire suivant plan

8 213 242

Tube de remplissage d'essence special SOFICA

1

Difficile à trouver (ile set coude), mais on peut moyenant astuce, utiliser l'ancien !

 

Càblage electrique vers tableau de bord

1

grande surface aurtomobile

DEMONTAGE PREALABLE :

Vidanger le liquide de refroidissement.

Debrancher la batterie

Deposer :

- le filtre à air

-les deux cartons de radiateur droite et gauche

-les coquilles droites de chauffage

-les trois raccords d'air partant des coquilles

-les durites entre moteur et radiateur

- le tube de remplissage du reservoir d'essence et sa patte de fixation sur gouttière (la dessouder au burin fin).

-la sortie d'air ronde sous le siège arrière. (si il y en a une)

MONTAGE :

Monter la nouvelle buse de chauffage ovale sous le siège arrière conformement au plan.

Obstruer l'ancien trou par une plaquette de tôle peinte conformement au dessin.

http://www.4cv-renault.com/technique/sofica/decoupe.jpg

Decouper le passage de la nouvelle sortie d'air ,à l'emplacement prevu. Tracer celui-ci en presentant la sortie ovale de la buse.

Fixer la buse d'air ovale avec 2 vis parker.

Obstruer l'emplacement de la buse d'air d'origine (si il y en avait une) avec une plaquette en tôle.

 

MONTAGE DU TUBE DE REMPLISSAGE DU RESERVOIR :

http://www.4cv-renault.com/technique/sofica/patte.jpg

Executer une nouvelle patte conforme au plan ci-dessus.

Fixer celle-ci à 20 mm de l'angle du capot arrière, sur la gouttière droite du coffr par deux ou trois point de soudure ou par 3 boulons de 4 mm de diamètre.

Fixer le nouveau tube de remplissage sur le reservoir et sur la patte.

Si l'on ne peut approvisionner le nouveau tube coude, il faut utiliser la methode suivante:

Acheter 2 durires coudees de reservoir d'essence (en vente chez les marchands specialises de pièces ancienes).

Scier 8 cm sur le bas du tube droit d'origine.

Utiliser ces 8 cm de tube entre les deux durites coudees superposees de manière à fair eun S compatible avec le positionement du SOFICA et de sa platine de fixation. Le Sainsi forme est place plus bas que sur le tube d'origine SOFICA.

Fixer le tout avec des coliers de serrage en bas et la nouvelle patte en haut.

Avec un peu de patience et un bon reglage de la partie en S, ça passe !

http://www.4cv-renault.com/technique/sofica/1a_1.jpg

Tube essence coude special SOFICA

MONTAGE DES RACCORDS DE DESEMBUAGE :

http://www.4cv-renault.com/technique/sofica/desembuage.jpg

Fixer le raccord d'air de 600 mm sur le tube de desembuage gauche, soude à la caisse.

Relier l'autre extremite à la sortie d'air basse des coqilles gauche restantes.

Fixer le raccord d'air de 1200 mm sur le tube de desembuage droit soude sur la caisse. Le passer derrière la cloison de dossier et le fixer avec deux collier (en utilisant les vis de fixation du panneau insonorisant). Relier l'autre extremite à la sortie d'air haute des coquilles du côte gauche restantes.

Sous la voiture, monter la gaine d'air en passant celle-ci entre le tube transversal et la traverse ronde arrière. Faire deboucher la gaine d'air à l'emplacement de la turbine SOFICA.

http://www.4cv-renault.com/technique/sofica/dessous.jpg

ALIMENTATION ELECTRIQUE DE L'APPAREIL :

Fixer l'interrupteur dans le trou perce dans le support inferieur de planche de bord.

Alimenter l'interrupteur en le raccordant à la borne "B" du NEIMAN" (alimentation après contact)

Un fusible de 10A est le bien-venu!

Passer le fil protege par une gaine plastique en le faisant cheminer le long du câble de competur de vitesse.

Relier le câble au moteur du SOFICA. Ne pas oublier de prevoir la mise à la masse de la platine de fixation du SOFICA !

MONTAGE DE L'APPAREIL SOFICA :

http://www.4cv-renault.com/technique/sofica/sofica.jpg

Fixer le raccord d'air sur la sortie de la turbine SOFICA, et mettre l'ensemble en place. Le raccord d'air passe entre le dossier et le radiateur, s'engage entre la traverse ronde de boite de vitesse et celle de la caisse.

Fixer la platine SOFICA avec des boulons de 6mm

Brancher les durites

Brancher le fil d'alimentation en veillant que la borne ne fasse pas de court circuit avec le tube du reservoir d'essence.

Re-fixer le carton gauche du radiateur

S'assurer du bon branchement de tous les tuyaux

Reposer le filtre à air.

Faire le plein de liquide de refroidissement

Purger le radiateur de SOFICA par la vis de purge situee sur le radiateur de chauffage.

4CV/750 Rebuild Files

These are pictures from 3 4CVs/750s. The John Bolster 750, The Editor's and a spare picked up as a donor...that had another one inside.

John Bolster - RHD Paris Built Manual with Sunroof and Engine Enhancements - Originally Gold Coloured and now Blue



The Editor's Acton Built RHD 4CV Ferlec (Ex Renault UK Preservation)

Recovered RHD for Spares - Acton Built

Bitsa Inside - Probably Acton Built.

Dashboards

Acton Built Ferlec and Donor Vehicles


John Bolster 4CV - Dashboard

Ferlec Foot Pedals - Note NO clutch Pedal

Nearside (Left) Rear wing with Ducillier Control Box - John Bolster

And the same area on the Ferlec (Note Ferlec Box on right that control clutch "take up" as the accelerator is depressed.) In this case the usual rot point of the inner wing has had an additional layer put on it of composite barrier which we use at work as this time it's going to last more than 10 years. This is not original but is practical.

Ferlec 4CV (the colour is not original as it got an "overspray" while it was on display)

The "Donor" car has the high level side markers/indicators (as wired on this one). Neither the John Bolster or the Editor's have these. It though (as does the Ferlec) have over riders on the bumpers which the John Bolster car does not. The Ferlec has white bumpers rather than the usual chrome.

Often someone boasts what they found when they opened the boot...however in this case, a spare engine and Ferlec clutch and a boot (front) load full of extras.....

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