Jump to content

Av8ferg

L28 from 82 ZX teardown

Recommended Posts

So, I got a call from the machine shop about my engine and it appears there is a problem with the head,  The mechanic said one of the valve seats was protruding into the chamber by about .1000”.  Said the head had been worked at some point in its life and someone did a “hack job” putting in this new valve seat.  He said the can replace it and recommend doing all of them and then they would grind the valves also.  So they want an extra $240 to do this over the $220 I was already going to pay,  My question to the crowd should I proceed and allow them to do this work or abort and find a different head.  The guy doing the work said he rebuilt a L28 last year and they can do the work, 

I really don't know much about this topic and only have read in the Nissan engine rebuild book by Tom Monroe that replacing valve seats is strictly the professional machinist.  I really don't know much about this shops specific reputation or how much they really know about these Nissan engines,   “The Captain” fielded an emergency call from me today to help me understand what the machinist was saying and called him back to verify it.  Much appreciated CO!  

I might drive to the shop tomorrow to get pics.  

 

 

Share this post


Link to post
Share on other sites
Captain, I’m going to look today and see if there is any marks like that on mine. I thought I took a close look already for witness marks but now I know exactly what to look for, thanks.
BTW, I grabbed a non-EGR head from one of the 75s in that yard. They only wanted $40 (that’s for the intake, heat shields, throttle body, injectors and all sensors on the head) so I figured why not grab it. Haven’t decided if I’ll use this or the ZX intake. 45233285c16c11ca3623145d880e193b.jpg&key=12ca56d8e6c34afbe9a0682cd81abfab60ddf82a84fa901d864b1e85646be43a
 
Sent from my iPhone using Tapatalk
 

Those clean up real nice....
c4b5f46bcd42c5484e922b2ce973b9f4.jpg

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.