Jump to content


Photo

Very Noisy Tappets On My Spi


  • Please log in to reply
24 replies to this topic

#1 dmandan

dmandan

    On The Road

  • TMF+ Member
  • PipPip
  • 37 posts
  • Location: Ipswich

Posted 12 September 2019 - 03:58 PM

Hi, I recently had the head off did all the porting ect, have put it back together with 1.5 rockers set gaps to 15thou as advised but have one really noisy tappet. Oil is good, rockers are on properly so the oil channel is working.

 

Anyone got ideas what to check next?



#2 whistler

whistler

    One Carb Or Two?

  • TMF+ Member
  • PipPipPipPipPipPipPip
  • 985 posts
  • Location: Cardiff

Posted 12 September 2019 - 06:14 PM

If the 1.5 rockers were second hand then the rocker shaft could be worn.



#3 mina08

mina08

    Mini Mad

  • TMF+ Member
  • PipPipPipPip
  • 238 posts
  • Location: Stockholm

Posted 13 September 2019 - 09:04 AM

or the rocker cover is not tall enough



#4 nicklouse

nicklouse

    Moved Into The Garage

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPipPip
  • 13,040 posts
  • Location: Not Yorkshire
  • Local Club: Anonyme Miniholiker

Posted 13 September 2019 - 09:21 AM

as suggested above the rockers could be touching the cover.

 

so does it make the noise with the cover off?



#5 dmandan

dmandan

    On The Road

  • TMF+ Member
  • PipPip
  • 37 posts
  • Location: Ipswich

Posted 13 September 2019 - 12:58 PM

they're brand new from minisport have had a good look at the inside of the cover and no noticeable marks



#6 dmandan

dmandan

    On The Road

  • TMF+ Member
  • PipPip
  • 37 posts
  • Location: Ipswich

Posted 13 September 2019 - 12:59 PM

it would leave marks if they were fouling the lid right?



#7 MiniMadRacer

MiniMadRacer

    Mini Mad

  • Members
  • PipPipPipPip
  • 176 posts
  • Location: Essex

Posted 13 September 2019 - 01:41 PM

As Nick has suggested run the engine with the cover off for a few minutes.. oil will NOT be splattered all over the place while you do this.. if its still noisey put a long screwdriver on a non moveable part of the rocker gear near each moveable rocker with your ear near the handle end of the screwdriver, and you should be able to narrow down which rocker is likely to be making the noise 



#8 nicklouse

nicklouse

    Moved Into The Garage

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPipPip
  • 13,040 posts
  • Location: Not Yorkshire
  • Local Club: Anonyme Miniholiker

Posted 13 September 2019 - 03:40 PM

it would leave marks if they were fouling the lid right?

hardly any marks.



#9 nicklouse

nicklouse

    Moved Into The Garage

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPipPip
  • 13,040 posts
  • Location: Not Yorkshire
  • Local Club: Anonyme Miniholiker

Posted 13 September 2019 - 03:40 PM

they're brand new from minisport have had a good look at the inside of the cover and no noticeable marks

 are that might be your problem.

 

also some are just louder than others.



#10 dmandan

dmandan

    On The Road

  • TMF+ Member
  • PipPip
  • 37 posts
  • Location: Ipswich

Posted 16 September 2019 - 09:41 AM

So noticed the tappet is pretty quite when i start the engine then grows louder as the engine warms up, would suggest a tight tolerance sopmewhere that's only causing noise as metal expands right?



#11 dmandan

dmandan

    On The Road

  • TMF+ Member
  • PipPip
  • 37 posts
  • Location: Ipswich

Posted 16 September 2019 - 11:53 AM

it's definitely not the rocker box as the noise is there with this removed, it's coming from valves 8 & 1 but i redid the gaps and pretty sure they're right (having redone them about 100 times already)

 

possible cam issues maybe?



#12 MiniMadRacer

MiniMadRacer

    Mini Mad

  • Members
  • PipPipPipPip
  • 176 posts
  • Location: Essex

Posted 16 September 2019 - 12:23 PM

If you grab the 1 and 8 rocker when its at TDC and you would normally adjust each one, can you twist it from left to right or indeed pull it left to right... noisey 1 and 8 would suggest badly shimmed / spaced rockers at the end of the shaft allowing them to float up and down the shaft a bit (If that makes sense)



#13 dmandan

dmandan

    On The Road

  • TMF+ Member
  • PipPip
  • 37 posts
  • Location: Ipswich

Posted 17 September 2019 - 08:10 AM

Hey Noobies I think you might be right there's definitely lateral movement on 8, although there's no noise from 1 at all, so add some shims, you think that can be done without the assembly coming off?



#14 MiniMadRacer

MiniMadRacer

    Mini Mad

  • Members
  • PipPipPipPip
  • 176 posts
  • Location: Essex

Posted 17 September 2019 - 08:17 AM

Depends I think on what side you need to shim.. If its between the split pin washer and rocker then use you can do it in situ.. if you need to shim the other side of the rocker (if you get my drift) the rocker would need to slide off the shaft and to do that you would need to release the push rod from the rocker.... you may be lucky and have just enough adjustment there to fully loosen the rocker ball... remove the nut totally and fully unscrew the adjuster and see if the ball pops out off the push rod. I wouldn't leaver the push rod though tempting as this may be or you might bend it



#15 dmandan

dmandan

    On The Road

  • TMF+ Member
  • PipPip
  • 37 posts
  • Location: Ipswich

Posted 17 September 2019 - 09:54 AM

will let you know how i get on, thanks for the advice






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

Mini Spares