Jump to content


Photo
- - - - -

Clunk When Accelerating


  • Please log in to reply
9 replies to this topic

#1 i3670

i3670

    Starting My Mini Up

  • Noobies
  • Pip
  • 4 posts
  • Location: Vetlanda

Posted 05 June 2026 - 04:20 PM

I have a similar issue with my -88 to this post: https://www.theminif...ving-from-stop/

 

When I let go of the clutch and press the throttle there's a clunk.

I have looked through the engine bay. MY suspicion is the top steady. I can move it slightly by hand (I don't think it is supposed to?) and the bolt closest to the rear bulkhead is loose (I cannot tighten it). Is my suspicion correct?

Also, I can rock the engine by hand. I do not believe this is normal. It can't be. Can it?

 



#2 Earwax

Earwax

    Super Mini Mad

  • TMF+ Member
  • PipPipPipPipPipPip
  • 577 posts
  • Location: Brisbane

Posted 05 June 2026 - 09:52 PM

It does sound like the upper engine steady - near clutch end. I have had an adjustable one out of a car for about 12 months - went to refit yesterday and crumble crumble of rubber.

 

The long bolt doesn't have to be tight  tight - it just locates the back of the arm - With the exhaust headers in place / and the slave cylinder nearby - it can be a pain to fasten on the bottom. Also check the engine steady 'bar / bracket on the end of the block - the bolts here have been known to sheer ( and often remain in the block).  The aftermarket repair kits ( with different versions depending on what is left inside the block) do a great job -  but are a pain to fit in a tight space 



#3 i3670

i3670

    Starting My Mini Up

  • Noobies
  • Pip
  • 4 posts
  • Location: Vetlanda

Posted 05 June 2026 - 10:49 PM

It is definitely the top steady. I went to feel the loose bolt and I could pull it out so it has sheered at the engine block. It is basically flush with the engine block so I'll try a screw extractor and put a new bolt in. The rubber on the arm itself seems to be fine.



#4 MikeRotherham

MikeRotherham

    One Carb Or Two?

  • TMF+ Member
  • PipPipPipPipPipPipPip
  • 1,024 posts
  • Location: Westwoodside North Lincs

Posted 06 June 2026 - 06:49 AM

It is definitely the top steady. I went to feel the loose bolt and I could pull it out so it has sheered at the engine block. It is basically flush with the engine block so I'll try a screw extractor and put a new bolt in. The rubber on the arm itself seems to be fine.

If you're dismantling the steady and the bushes have been on the car a while I'd take the opportunity to renew them if they are easily available where you are. It's fairly easy to do and you'll have all bases covered.



#5 mab01uk

mab01uk

    Moved Into The Garage

  • Members
  • PipPipPipPipPipPipPipPipPipPipPip
  • 12,931 posts
  • Local Club: Mini Cooper Register

Posted 06 June 2026 - 09:11 AM

It is definitely the top steady. I went to feel the loose bolt and I could pull it out so it has sheered at the engine block. It is basically flush with the engine block so I'll try a screw extractor and put a new bolt in. The rubber on the arm itself seems to be fine.

 

If you can't easily get the sheared bolt out the block, Somerford Mini sell various repair kits as listed below:-

Engine Mountings (with diagrams):

https://www.somerfor...0_100769_100796

 

Broken Steady Kits            
"What's even more frustrating than worn out upper steady bar bushes is one or both of the mounting bolts shearing off in the cylinder block when you try to replace 
them!  Sometimes one or both block bolts have even been sheared beforehand by the shock caused by ineffective bushes.  Either way, a classic situation of a five 
minute job turning into a major exercise can result if engineering workshop techniques or tools such as 'easy-outs' are required to remove the remainder of the bolt(s).  
Somerford Mini can supply an easy-to-fit mounting bracket assembly which bypasses the use of the offending engine block bolt holes.
                         
The four broken steady kits provide alternatives for use on cylinder blocks where either the longer bolt only or both bolts have broken, on engines without or with 
a crankcase breather on the flywheel housing (the latter for 1275cc engines from 1969 on).  Each kit includes an adaptor bracket, plus the bar retaining bracket 
with appropriate bolts and washers."            
                         
Ill. No.     Part No.                   Description                                    Qty. Rqd.              Remarks
147     ESK003     BROKEN STEADY KIT, for sheared longer bolt     1     Engines without flywheel housing breather. All models 1959-69; not 1275cc 1969 on.
           ESK004     BROKEN STEADY KIT, for two sheared bolts     1     Engines without flywheel housing breather. All models 1959-69; not 1275cc 1969 on.
           ESK006     BROKEN STEADY KIT, for sheared longer bolt     1     Engines with flywheel housing breather. 1275cc 1969 on.
           ESK005     BROKEN STEADY KIT, for two sheared bolts     1     Engines with flywheel housing breather. 1275cc 1969 on.


Edited by mab01uk, 06 June 2026 - 09:16 AM.


#6 alpder

alpder

    Super Mini Mad

  • TMF+ Member
  • PipPipPipPipPipPip
  • 550 posts
  • Location: Pembrokeshire
  • Local Club: MCR

Posted 06 June 2026 - 10:17 AM

While at a kit-car show recently, I came across a set of left-handed drills. Could be just the thing for this - combination of the heat and the torque of drilling would probably have it out.

 

There are stud-removers (left-handed tapered thread things - look a bit like backwards threaded taps) but the cheap ones I've bought, at least, have always been horribly brittle.



#7 i3670

i3670

    Starting My Mini Up

  • Noobies
  • Pip
  • 4 posts
  • Location: Vetlanda

Posted 06 June 2026 - 10:35 AM

Thank you all! I will try to extract the bolt first (fingers crossed). Otherwise I'll try your methods. Might also invest in this kit: https://www.minispar...hand-drive-1275 just to be safe in case of future disasters.



#8 Cooperman

Cooperman

    Uncle Cooperman, Voted Mr TMF 2011

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPipPip
  • 23,513 posts
  • Location: Cambs.
  • Local Club: MCR, HAMOC, Chelmsford M.C.

Posted 06 June 2026 - 08:24 PM

“Easy-Out” are fine until you snap one in the hole. Been there, done that!
The best option is to drill out the broken bolt and fit a HeliCoil. However, access to do this is poor with the engine in the car.
Best option is to buy one of the temporary repair kits and wait until the engine is out for another reason and do the job correctly.

#9 i3670

i3670

    Starting My Mini Up

  • Noobies
  • Pip
  • 4 posts
  • Location: Vetlanda

Posted 10 June 2026 - 08:05 AM

Just for future reference, does anyone have a picture of the ENGINE STABILISER KIT LEFT HAND DRIVE 1275 - Mini Spares installed properly?



#10 mini-mad-mark

mini-mad-mark

    One Carb Or Two?

  • TMF+ Member
  • PipPipPipPipPipPipPip
  • 922 posts
  • Local Club: northants wot no brakes

Posted Yesterday, 09:53 PM

“Easy-Out” are fine until you snap one in the hole. Been there, done that!
The best option is to drill out the broken bolt and fit a HeliCoil. However, access to do this is poor with the engine in the car.
Best option is to buy one of the temporary repair kits and wait until the engine is out for another reason and do the job correctly.

Also been there done that on my first mini - had to get the engine out and take the block to get the bolt and Eezi-out spark eroded and the block welded (nice  work on cast iron!) and re-tapped - it was a good engine that I wanted to save.

 

Of course when the bolt snapped on my current mini (in the icon) I knew there was the stabiliser "saver" bracket so just used one of those (still on there after 22 years...)


Edited by mini-mad-mark, Yesterday, 09:53 PM.





1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users