Latest Joe Gibbs Racing mechanical issue confirmed after Martinsville

*<br>It appears that the engine issues suffered on Sunday by Denny Hamlin and Chase Briscoe were the result of a bad batch of valve springs but there is much larger quality control issue at play regarding Joe Gibbs Racing right now.<br>First and foremost, Coach Joe Gibbs confirmed ‘valve springs’ on Monday during an appearance on SiriusXM NASCAR Radio.<br>“I think it always concerns you ...<a class='more' href='https://www.motorsport.com/nascar-cup/news/latest-joe-gibbs-racing-mechanical-issue-confirmed-after-martinsville/10772079/?utm_source=RSS&utm_medium=referral&utm_campaign=R SS-NASCAR&utm_term=News&utm_content=www'>Keep reading</a>

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