On the underside of the left intake manifold (left-hand drive) two of the three hose ports are blocked. However how should they be blocked off? Is there a plug that goes directly into the manifold or should the barbed hose connectors be capped off? I purchased two intake plugs thinking they are for this purpose but there is no way to fit them as far as I can see. They are small solid aluminum discs probably 4mm thick. Thanks
Yes they should be capped off. They perish from the heat over time and fall off.
The part you need is EBC80043 Still available new from main dealers.
Though a short section of rubber hose with a bolt in the end will do the same job (even if it’s temporary). You may find a past owner as adjusted the air valve to compensate for the air leak through these lost caps? I have seen it happen a number of times.
88 3.6 XJ6 PDH/CEM 90 Range Rover Vogue SE 3.9 V8 LPG 91 3.2 XJ6 SportPack Manual 91 4.0 XJ6 Manual 92 4.0 XJR Manual 92 4.0 XJR 93 3.2s - 4.0 Manual conv 93 4.0 Sovereign 93 6.0 XJ81 DD6 93 6.0 XJ81 XJ12 94 4.0 XJR 96 4.0 X306 XJR 96 4.0 X300 D6 97 4.0 X300 Sport Manual 2000 LR Discovery ES TD5 A Breaking 40/ 300