Would you rather practice swapping a flat tire for a spare or learn the hard way?
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By NAPA
Chase Elliott qualified fifth for Sunday’s NASCAR Cup Series race at Circuit of The Americas. Elliott had a tough-handling No. 9 link hidden, please login to view Chevrolet in the opening stage but still managed to earn three stage points with an eighth-place result. After a lengthy pit stop for adjustments during the stage break, Elliott was deep in the field to start stage two but made up a little ground. The team ended up flipping the stage and took the green-and-white checkered flag in 28th. In the final stage, Elliott gained track position following a quick call to visit pit road just prior to a caution slowing the race. With several teams pitting under the yellow flag, the 30-year-old driver restarted 12th with just 17 laps to go. Elliott drove to a seventh-place finish. Elliott leaves COTA third in the Cup Series points standings, 72 markers behind the leader. The NASCAR Cup Series visited Circuit of The Americas over the weekend. Chase Elliott took to the track on Saturday morning in the No. 9 NAPA Auto Parts Chevrolet for practice and qualifying, ultimately earning a fifth-place starting position for Sunday’s race. Elliott held strong in the top 10 in the opening laps of the race before slipping to 12th on lap 11. Some teams opted to visit pit road in the closing laps of the opening stage, while Elliott and the No. 9 team chose to remain on the track, earning an eighth-place finish and three valuable stage points in the first segment.
Under the stage-ending caution, Elliott reported that he “couldn’t keep the rears on it.” The team, led by veteran crew chief Alan Gustafson, opted to make a lengthy pit stop for necessary adjustments to the No. 9 NAPA Auto Parts Chevrolet to improve handling. Elliott took the green flag for the second stage deep in the field. He advanced to 27th in the stage before some teams began making green-flag pit stops. Elliott reported that the No. 9 NAPA Auto Parts Chevrolet’s handling was better, but he needed more. This time, the team opted to visit pit road for four tires, fuel and an air pressure adjustment just prior to the end of the stage. Elliott returned to the track, finishing the stage in 28th on lap 45.
Staying out during the stage break, he lined up 19th to start the final stage on lap 51. He improved to 16th early before dropping just outside of the top 20. Gustafson called Elliott to pit road on lap 63 for four fresh tires and fuel. The 30-year-old driver returned to the track in 28th and advanced to 15th by lap 72 as a long cycle of green-flag pit stops continued. On lap 74, Elliott noticed that a competitor had lost a wheel on the track and made the quick call to come down pit road before officials waved the caution flag. The team was at the ready with four tires and fuel. The strategy call helped Elliott with track position after several teams visited pit road once it opened. He lined up 12th for the restart with just 17 laps to go. Elliott made quick work of the cars ahead of him, reaching the sixth position within one lap. He dropped to ninth with 10 laps to go, but as the race wound down, he was able to reel in a couple cars ahead of him. Elliott improved to eighth with five circuits to go and made a last-lap pass to ultimately finish seventh.
Elliott remains third in the Cup Series points standings, 72 markers behind the leader.
Start / Finish: 5 / 7
Points Standing / Total: 3rd / 114 pts. (-72)
Next Race: Sunday, March 8, Phoenix Raceway
How to Watch or Listen: 3:30 p.m. ET on FS1, SiriusXM or MRN
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By Counterman
A common topic today surrounding flat tappet lifters is the need for zinc in the engine oil to prevent wear. But what exactly is the reason? Let’s take a quick look at flat tappets and what they need to survive.
On traditional flat-tappet lifters, the base of the lifter may look flat, but it’s convex, with the center being about .001” to .002” higher than the edge. The lobes on a flat-tappet cam are slightly tapered, and the centerline of the lifters are slightly offset in relation to the cam lobes. This causes the lifters to rotate as the cam turns, which helps reduce friction and wear.
But there’s more to it. The contact surface between the cam lobes and lifters is the highest loaded surface in an engine and the break-in process for a flat-tappet cam and lifters is very critical to promote the rotation of the lifters as they wear in with the cam. This is necessary to prevent immediate and future wear and damage to the camshaft.
However, because of this highly loaded surface, even after break-in, flat tappets and cam lobes need a wear barrier where they contact each other to prevent damage. Take away that wear barrier and it spells trouble. Due to emission regulations, ZDDP additives have been removed from modern engine oil, and the ZDDP, or zinc, was that wear barrier!
How does it work? ZDDP is not a lubricant, but once it gets hot and comes under pressure, it becomes a metal treatment that adheres to the metal surface of the cam lobes and lifters and becomes the wear barrier between them.
If you’re running a flat-tappet cam, you must use specific ZDDP motor oil or additives to prevent rapid wear.
This isn’t a problem on modern engines. In the ‘80s, roller lifters began to see regular use in production vehicles. As emission regulations got stricter and ZDDP was removed from engine oil, the lack of it had no effect on these engines due to the reduced friction of the roller.
For breaking in a new camshaft and lifters, ZDDP is required, but so is assembly lube. Since the zinc in engine oil isn’t effective until it gets hot, the assembly lube prevents damage until the zinc breaks down and builds up on the metal surfaces.
It’s also important to use a pre-blended break-in oil with the correct ZDDP level designed for break-in. Too high a level of ZDDP can slow the break-in process and too much zinc can cause additional wear.
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By Nancy Bitter
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Whether you're a DIY enthusiast or a professional mechanic, JM Used Auto Spare Parts is the place to go for all your used auto parts needs. Browse through their extensive inventory today and get your vehicle back on the road in no time.
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By NAPA
Daniel Hemric’s afternoon at Talladega Superspeedway ended early after a flat right rear tire triggered an accident and an early retirement. The driver of the No. 19 Gates Hydraulics Chevrolet Silverado RST finished 34th after suffering hard contact following a cut tire and sits 32 points below the cut line in seventh position in the NASCAR CRAFTSMAN Trucks Series playoff standings with one race remaining in the Round of 8.
Hemric took the green flag in 17th position on Friday afternoon and wasted no time moving towards the front. He utilized both lanes of the draft to advance inside the top-10 just three laps into the event. On lap four, Hemric suffered severe contact to the right side of his Gates Hydraulics Chevrolet as a multi-truck accident triggered beside of him on the frontstretch. He sustained damage to the right-side door and significant harm to the right front and right rear fenders.
Crew chief Kevin Bellicourt took command of the damage control efforts as Hemric made multiple pit stops to address the harm. He restarted at the tail of the draft on lap eight and rebounded to charge into the top 10 by the end of Stage 1 to collect one point on lap 20.
The Gates Hydraulics crew made additional repairs during the stage caution to address the right-side fenders and mitigate the rubs on both right-side tires. Consequently, Hemric restarted 34th on lap 27 and went forward once again in Stage 2. He advanced to 15th by lap 32 and restarted ninth on lap 36. Hemric’s maneuvers to progress forward came up just shy of additional points as he ran 11th at the end of Stage 2 on lap 40.
Under the subsequent stage caution, Hemric made two more pit stops as he continued to endure tire rubs from bodywork contacting the right rear tire. Despite the repairs, Hemric cut a right rear tire in the middle of the draft on lap 53. He also sustained terminal damage to the rear of his Chevrolet after absorbing severe contact from the No. 5 truck. Upon assessing the damage on pit road, Hemric drove to the garage area and was dealt a 34th-place finish.
“We cut a right rear tire,” Hemric said after the incident. “We had damage from lap five or six and really the Gates Hydraulics Chevrolet was destroyed. We were fortunate enough to just constantly getting it more and more clearanced. We were out of right rear tires, and being out of tires, we needed more so we didn’t have a used tire where the side wall was almost worn through from the damage. We didn’t have any to put on and NASCAR wouldn’t give us one, so it was a bunch of things for a while there. Finally, one of the tires we put back on, it blew down the back straightaway and felt like I was going to have to get to pit road. There was no yellow and I got smoked from behind, 15 or 20 seconds after the tire went down. That was strange and kind of unfortunate that we were in that situation.”
Hemric will enter the final race of the second round at Martinsville Speedway 32 points behind the provisional cut line to advance to the championship finale.
Start / Finish: 17 / 34
Points Standing / Total: 7th / -32 below cutline
Next Race: Friday, Oct. 24, Martinsville Speedway
How to Watch or Listen: 6:00 p.m. ET on FS1 or SiriusXM
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By Toyotarav4
We sell and distribute all Toyota RAV4 parts beginning from the 2012 model till date contact us with your order [email protected]
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