Use a mirror and torch to find if there is one hidden behind the engine, made inaccessible by the bulkhead. They may be blown loose by pressure from the system, corroded, or even loosened by vibration. Inspect hoses carefully at bends and joints, as well as where they clip on to stubs (SeeĬore plugs, which fill holes left in the cylinder block when it is being cast, are other likely sources of leaks. Off an old hose can easily break off the stub. Some cars have plastic coolant tanks, and leaks in them are also beyond do-it-yourself repair.Īlways treat them gently - using a screwdriver to But leakage from a radiator seam is best left to a garage. Small leaks can sometimes be cured by sealing preparations available from shops and garages. Seams at the top and bottom of the radiator are also danger spots. Is flexed by engine movement over the end of the stub to which it is fitted, or where an overtightened clip has bitten into the rubber. Has built up - forcing out coolant at any weak spot. So are rust-coloured stains in theīut if you cannot actually see the leak, a systematic check is called for.
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