Gibbs team pinpoints engine issues

Kyle Busch says Joe Gibbs Racing has determined that problems with two of its engines last weekend at Auto Club Speedway in California were valve-related. #20-Joey Logano's team switched his the morning of Sunday's race when valve leakage was discovered. Logano's team didn't think the engine would last for 400 miles. Denny Hamlin's engine failed 105 laps into the race due to an unrelated value train issue, leaving last year's Chase runner-up with a 39th-place finish that dropped him to 21st in points. Busch said Friday that identifying the problem is a huge step in the right direction for JGR, which has had engine issues in all five races this season. "Is there concern? Of course," Jimmy Makar, JGR's senior vice president of race operations, said earlier this week. "We've had a lot more issues than we'd like to see, this early in the season especially. Probably the bigger issue is for the most part they are non-related. That makes things harder to figure out. If you had the same thing happening over and over again you could focus on it." Makar said only Hamlin's failure on Sunday showed signs of a potential bad part. He said the batch that the part came from would be quarantined for this weekend's race at Martinsville to see if any issues arise. Associated Press