Jump to content
View in the app

A better way to browse. Learn more.

300ZX Owners Club

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

NA which I bounced over a curb about a month ago. Ever since the engine has had a vibration worst at about 2000 RPM. running on 6 pots and nothing seems to have come loose and engine revs very freely. any thoughts what it could be.

Featured Replies

Sounds as though you may have damage either an engine mount or a gearbox mount. The one to look at first is the rear gearbox mount which has some sort of stabiliser block fitted which protrudes downwards. If bent this causes a vibration.

  • Author

Ha I check engine mount will check Gearbox mount sound like it could be the monkey

you haven't dented the sump have you.

the lowest part of the sump is where the oil vaccum pipe sits.

A little knock in the right place will crease and bend the internal pipe like a straw. With a kink in that it could give you a few problems.

 

Check under the car to see if you have any scrapes or dents in it.

You certain it's running right on all 6 ? Start the engine, put your hand on the door sill, if you can feel vibration - it isn't !

  • Author
Does the vibration occur when stationary?

 

Yes in fact most noticable when stationary.

  • Author

Nope I haven't. Good thinking though I'll see to it and let you know.

  • Author

Right still no joyful. Checked all the ancilaries on the pullies and all seem OK and in line. Done a compresion test and all even across and virtually as new figures. Though it is running a litle rich. Wondering if timing has slipped and or if the MAF could cause it. Going to stick my new MAF on it and see if it makes a difference.

 

Anyone near Astley Manchester with a Conzult that Phil (EX C & S Wood) at Blackmoore Motor could borrow to plug in and give her the once over as the blink Code is showing 55.

  • Author

Think I've found it. Will see tomorrow. Looks like a dogy injector plug. So got to go see the Mrs Z EX to see if set new plugs I bought before the full loom are still in the garage?

  • 4 weeks later...
  • Author

Well I found the problem at last

 

The Spiggot bush collapst causing the vibration and that caused the friction plate to oscillate and then come into contact with the Presure plate. Which then broke a puck off the clutch. That then tried to escape through the forks and hey presto bits of the forks escaped through the bell housing.

 

Hence real bad vibration and very little peddle. Amazed that I had any peddle left at all. So Standard clutch going in short term till new XTD clutch arrives.

 

+ new spiggot bearing which wasn't replace when clutch installed as i was told we didn't need to. Mmmm:headvswal

 

It's done 7,000 miles before it went but it should have done 70,000

So remember when you change your clutch. Regardless of how much of a ball hache getting the old spiggot bush out is. Just do it.

my clutch is going to be swapped,

 

how much/where from/part number of this bearing?

 

pain in the arse to do? or isit easy when the gearbox/clutch is off....

  • Author
my clutch is going to be swapped,

 

how much/where from/part number of this bearing?

 

pain in the arse to do? or isit easy when the gearbox/clutch is off....

 

MJP £7.90 amd just fiddley as it will stay sitting in the end of the crank when box is off. + well werth changing your pivot Ball at the same time and if you contemplating going for an uprated clutch in the future then get the uprated pivot ball too. Danny sells them. Only a few pounds. I've had one of them Snap off before now and it tends to destroy the slave cylinder because when you pump the peddle it pushes the rod right out and the selector fork drops into the bell housing. So better to spend the extra £20 or so and know these silly little things are not going to fail and cost you by having to drop the box again.

Well I found the problem at last

 

The Spiggot bush collapst causing the vibration and that caused the friction plate to oscillate and then come into contact with the Presure plate. Which then broke a puck off the clutch. That then tried to escape through the forks and hey presto bits of the forks escaped through the bell housing.

 

Hence real bad vibration and very little peddle. Amazed that I had any peddle left at all. So Standard clutch going in short term till new XTD clutch arrives.

 

+ new spiggot bearing which wasn't replace when clutch installed as i was told we didn't need to. Mmmm:headvswal

 

It's done 7,000 miles before it went but it should have done 70,000

So remember when you change your clutch. Regardless of how much of a ball hache getting the old spiggot bush out is. Just do it.

 

 

Holy crap!

 

You're lucky it didn't break apart and come thru the bell housing!

  • Author

I have 2 small holes in the bell housing as a result but nothing too serious

Thank god. Thought I do have another Gearbox with a TT and a NA bellhousing just incase i need it.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

Recently Browsing 0

  • No registered users viewing this page.

Important Information

Terms of Use

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.