Jump to content

14th Annual SoCal Vintage BMW Meet 2021! “All couped up”

Registration is still open. Rally from NorCal is scheduled for Friday. Post your event photos.

SoCal Vintage is Here! 

Post your photos!

rocker arm broke time to pull the head


Recommended Posts

Pulling the head for the 2nd time in 2 months. Because my friend in his e30 who did a top speed run broke his rocker arm told me about it and i made fun of him, he ended up spending 1100 bucks to replace it... so 4 weeks later i do a top speed run. first time taking the car past 4k rpm. so i did my run... next day got in the car saw black smoke and felt a loss of power and a different noise... said shit and now here i am waiting for my gaskets to come in (over night early morning shiping). imma take some fun picks of the arm.

cost of a broken rocker arm

E30- $1100 parts and labor oceanside autosport

2002- $65- gasket set w/ shipping. free rocker arm from La Jolla indie misc. parts $20. oil $25, coolent $15 total $125

Know what I am doing just asking for some tips about the head assembly for the rocker arm. 1975 2002

Link to comment
Share on other sites

...... yea - $65 is your starting point . . . . . . . . .

rockers "just" don't break

some other influence - like poor assembly,

missing parts, piston smacking valve, loose nut

inside combustion chamber, broken spark plug bits

in combustion chamber ? . . . . . . . . .

so when you have the head off - inspect the timing chain

and the chain rails, tensioner, other rocker arms, proper

placement of rocker/shaft/spacers/springs/lube tube function

oil pressure/piston tops/ broken con rods ? . . . . . . . . . . . .



Link to comment
Share on other sites

or much more likely, loose adjuster, very weak (or wrong) valve springs

or missing rocker retaining springs.

or maybe missing timing chain tensioner bits.

I run mine right out to 7500 (better springs, is all)

and it typically gets a couple of seasons out of a set of rockers-

and when one fails, it is ALWAYS, and i do repeat ALWAYS the case

that I measure the spring under it and find it to be weak. Did I say ALWAYS


But if the valve adjuster backs off, that can do it at about 4500 or so-

the slapping is just too much for them.

th3 t

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...