ISO INTERNATIONAL STANDARD 9817 First edition 1991-12-15 Passenger cars --- Engine cooling systems Dimensions of pressure caps and their ramp seats on filler necks Voitures particulieres - Systemes de refroidissement des moteurs Caracteristiques dimensionnelles des soupapes de remplissage Reference number ISO9817:1991(E) Not for Resale ISO 9817:1991(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through isO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern mental and non-governmentaf,inliaisonwithisO,alsotakepartinthe work. isO collaborates. closely with the International Electrotechnical Commission(lEC)on all mattersof electrotechnicalstandardization Draft Internationai Standards adopted by the technical committees are bodies casting a vote. Iinternational Standard isO 9817 was prepared by Technical Committee isO/TC 22, Road vehicles, Sub-Committee SC 24, Interchangeability of components of passenger cars. IsO 9817 forms one of a series, consisting of the foliowing Internationa! Standards: Iso 9133:1988, Passenger cars -- Engine cooling systems -- Threaded pressure caps and their seats on filler necks. Iso 9817:1991, Passenger cars - Engine cooling systems Dimen sions of pressure caps and their ramp seats on fller necks. methods and marking of pressure caps. @1SO1991 or by any means, electronic or mechanlcal, including photocopying and mlcrofilm, without permission in writing from the publisher. International Organizatlon for Standardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed In Switzerland ii ght International Organization for Standardization Not for Resale ISO 9817:1991(E) INTERNATIONAL STANDARD Passenger cars -- Engine cooling systems -- Dimensions of pressure caps and their ramp seats on filler necks 2.1 Seat with clamping ramps Scope The seat with clamping ramps shall be in accord- This International Standard specifies the dimensions ance with the dimensions shown in figure 1 and of seats with clamping ramps and of pressure caps for use on fller necks of engine cooling systems of given in table 1. passenger cars. Pressure cap 2.2 Dimensions The pressure cap shall be in accordance with the NOTE 1 The shapes of seats and pressure caps shown in figures 1 and 2 are for guidance only. dimensions showninfigure2and givenintable2. Copyright International Organization for Standardization Not for Resale