Anyone have an engine vibration @5k
Thread Starter
Scream baby Scream!!!
Joined: Sep 2002
Posts: 435
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From: Warrenton, VA.
Anyone have an engine vibration @5k
I was running a GTi the other night and I noticed an engine vibration starting around 5k and getting worse around 5.5k and the disappearing at 6k. Smooth running after that. Has anyone felt this before? Oh, I killed the GTi.
Carter 2.0
Joined: Jun 2004
Posts: 6,262
Likes: 7
From: Irvine Ca.
I would check the wheel balance first. It is the easiest. then mounts, then U-joints(rear first)
Bookmark Rockforddriveline.com
After you find out a drive line is $250 rebuilt you'll be looking to buy U-joints. The guys at Rockford are really nice and helpful for $50.
Bookmark Rockforddriveline.com
After you find out a drive line is $250 rebuilt you'll be looking to buy U-joints. The guys at Rockford are really nice and helpful for $50.
Rotary Enthusiast
Joined: Feb 2002
Posts: 938
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From: VA
Wheel balance? Not sure what you're refering to there, and our U-joins are not changeable. You will need to buy a new driveshaft if thats the case, which it isn't because its not load or speed dependant...just RPMS. I would say engine mounts as well.
-Joe
-Joe
Carter 2.0
Joined: Jun 2004
Posts: 6,262
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From: Irvine Ca.
Overdriven.....Joe....
If you loose one of those little weights off of your wheel, you gonna get a shimmy or a vibration that will come and go a different speeds. Don't take my word for it, go out and mark on your wheel where one of the weights are, pull off that weight and go take a spin. After you see the results put the weight back on your wheel where you made the mark. I'll wait patiently for your apology
No, the u-joints on a RX7 are not replaceable.........not as far as Mazda is concerned. They want you to buy a driveshaft for 300+. The correct size replacement u-joint is found at Rockford. You have to Drimel the welds on your stock shaft u-joint to remove the old u-joints. You then clean out the groove and put the Rockford joints in similar to the "Normal" way of doing things. Takes about two hours after you get the shat out. Oh by the way the Rockford U-joints are $52 shipped from Rockford to Cali.
That is why I originally told rotorhead to bookmark Rockford....... Had you taken time to look with your own eyes and learn something new I would not have had to spend my precious time typing this. Again I'll wait patiently for an apology
If you loose one of those little weights off of your wheel, you gonna get a shimmy or a vibration that will come and go a different speeds. Don't take my word for it, go out and mark on your wheel where one of the weights are, pull off that weight and go take a spin. After you see the results put the weight back on your wheel where you made the mark. I'll wait patiently for your apology
No, the u-joints on a RX7 are not replaceable.........not as far as Mazda is concerned. They want you to buy a driveshaft for 300+. The correct size replacement u-joint is found at Rockford. You have to Drimel the welds on your stock shaft u-joint to remove the old u-joints. You then clean out the groove and put the Rockford joints in similar to the "Normal" way of doing things. Takes about two hours after you get the shat out. Oh by the way the Rockford U-joints are $52 shipped from Rockford to Cali.
That is why I originally told rotorhead to bookmark Rockford....... Had you taken time to look with your own eyes and learn something new I would not have had to spend my precious time typing this. Again I'll wait patiently for an apology
I had the same problem right around 5k rpm's when fully warm. Does it also shake when you rev it in neutral?
Mine did, and when I pulled my motor for the rebuild I found a broken motor mount...
Mine did, and when I pulled my motor for the rebuild I found a broken motor mount...
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Rotary Enthusiast
Joined: Feb 2002
Posts: 938
Likes: 0
From: VA
Originally Posted by jhammons01
Overdriven.....Joe....
If you loose one of those little weights off of your wheel, you gonna get a shimmy or a vibration that will come and go a different speeds. Don't take my word for it, go out and mark on your wheel where one of the weights are, pull off that weight and go take a spin. After you see the results put the weight back on your wheel where you made the mark. I'll wait patiently for your apology
No, the u-joints on a RX7 are not replaceable.........not as far as Mazda is concerned. They want you to buy a driveshaft for 300+. The correct size replacement u-joint is found at Rockford. You have to Drimel the welds on your stock shaft u-joint to remove the old u-joints. You then clean out the groove and put the Rockford joints in similar to the "Normal" way of doing things. Takes about two hours after you get the shat out. Oh by the way the Rockford U-joints are $52 shipped from Rockford to Cali.
That is why I originally told rotorhead to bookmark Rockford....... Had you taken time to look with your own eyes and learn something new I would not have had to spend my precious time typing this. Again I'll wait patiently for an apology
If you loose one of those little weights off of your wheel, you gonna get a shimmy or a vibration that will come and go a different speeds. Don't take my word for it, go out and mark on your wheel where one of the weights are, pull off that weight and go take a spin. After you see the results put the weight back on your wheel where you made the mark. I'll wait patiently for your apology
No, the u-joints on a RX7 are not replaceable.........not as far as Mazda is concerned. They want you to buy a driveshaft for 300+. The correct size replacement u-joint is found at Rockford. You have to Drimel the welds on your stock shaft u-joint to remove the old u-joints. You then clean out the groove and put the Rockford joints in similar to the "Normal" way of doing things. Takes about two hours after you get the shat out. Oh by the way the Rockford U-joints are $52 shipped from Rockford to Cali.
That is why I originally told rotorhead to bookmark Rockford....... Had you taken time to look with your own eyes and learn something new I would not have had to spend my precious time typing this. Again I'll wait patiently for an apology
-Joe
Carter 2.0
Joined: Jun 2004
Posts: 6,262
Likes: 7
From: Irvine Ca.
Joe,
Thanks, I understand.
Not knowing the abilities or experiences of the original poster, I would first check the easy things.
Wheels first....Could be he was running in 4th gear and just so happened that he had the vibration at whatever speed that RPM equates to. maybe it was a back wheel that didn't feel like it was coming from the back and he misdiagnosed it for an engine vibration. When he slowed down the vibration went away. He was looking at the Tach and assumed it was engine related. Eriksseven pulled his motor only to find a broken mount. In his case He went for the hardest cure first and it turned out to be a mount that could've been changed in an hour or two. Lets look at the easy things first.
Then I said Mounts. Meaning motor and Tranny. I didn't mention any cure for the mounts because you can find replacments for them anywhere. A big prybar will tell you if one is bad or broken.
Then I suggested U-joints, I did say where to fine them because most 7 owners aren't aware of the drive shaft problem until they get a shimmy. When all the signs point toward the drive shaft and they get quoted $300 they will wish they had heard of Rockford. I searched far and wide for a cure for the drive shaft thing. The only economical cure is Rockford. And the guys at Rockford are real nice and helpful.
That's all I meant
Thanks, I understand.
Not knowing the abilities or experiences of the original poster, I would first check the easy things.
Wheels first....Could be he was running in 4th gear and just so happened that he had the vibration at whatever speed that RPM equates to. maybe it was a back wheel that didn't feel like it was coming from the back and he misdiagnosed it for an engine vibration. When he slowed down the vibration went away. He was looking at the Tach and assumed it was engine related. Eriksseven pulled his motor only to find a broken mount. In his case He went for the hardest cure first and it turned out to be a mount that could've been changed in an hour or two. Lets look at the easy things first.
Then I said Mounts. Meaning motor and Tranny. I didn't mention any cure for the mounts because you can find replacments for them anywhere. A big prybar will tell you if one is bad or broken.
Then I suggested U-joints, I did say where to fine them because most 7 owners aren't aware of the drive shaft problem until they get a shimmy. When all the signs point toward the drive shaft and they get quoted $300 they will wish they had heard of Rockford. I searched far and wide for a cure for the drive shaft thing. The only economical cure is Rockford. And the guys at Rockford are real nice and helpful.
That's all I meant
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