Carlos Sainz has broken ranks to reveal that it was a Renault engine failure that meant he could not start Sunday’s Belgian GP. I looked in the mirror and the exhaust was smoking a lot, then it started to sound like the exhaust was broken and, indeed, it was broken. “But we believe the problem was caused by a problem in the engine – in a cylinder was what I was going to say, but they won’t let me say it.”. It is the second race for this engine but it already seems like it will not last long,” he said.

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