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View Full Version : S13 sr20det lifter bore scratched

jdmgtom
12-23-2019, 11:45 AM
Hey, So I took my head to a machine shop to get my valves cleaned and to have new valves seals installed, they just called me back saying I need a new head. One lifter was stuck and they was able to get it out and saying the lifter bore is scratched. I just picked up it and its light hairline scratch, not deep at all. Has anyone experienced this? Am I really going to need a new head?
Thanks
S14rebuild
12-23-2019, 12:44 PM
Pics would help tremendously...

But if its a very fine light scratch, some emery cloth, light polish will do. Just depends how bad the scratch is...
jdmgtom
12-23-2019, 01:00 PM
https://imagizer.imageshack.com/v2/640x480q90/923/3RT0Oc.jpg
jdmgtom
12-23-2019, 01:02 PM
https://imagizer.imageshack.com/img921/1470/GFPiQs.jpg

With flash and a little bigger picture
S14rebuild
12-24-2019, 07:43 AM
Get a dremel with a polishing pad on it and buff that scratch down. And ull be good togo. Wouldnt replace a head for that.
jdmgtom
12-24-2019, 07:46 AM
Get a dremel with a polishing pad on it and buff that scratch down. And ull be good togo. Wouldnt replace a head for that.

THANK YOU! I will give it a shot, I cannot find another head anyways right now..
EFITTZY
12-24-2019, 08:53 AM
Get a dremel with a polishing pad on it and buff that scratch down. And ull be good togo. Wouldnt replace a head for that.

S14rebuild beat me to it. Had a similar issue on a 1.6 miata head. Hairline scratch on lifter bore, but was able to polish it out no issues at all. Clean her up and you should be good to go!
S14rebuild
12-24-2019, 09:09 AM
THANK YOU! I will give it a shot, I cannot find another head anyways right now..

Np, good luck with the build
jdmgtom
12-24-2019, 09:15 AM
S14rebuild beat me to it. Had a similar issue on a 1.6 miata head. Hairline scratch on lifter bore, but was able to polish it out no issues at all. Clean her up and you should be good to go!

Thank you for the reassurance, I've been going to this machine shop for a while now, I guess they didn't want to mess with this one.
jdmgtom
12-24-2019, 09:16 AM
Np, good luck with the build

Gonna need it, its been a roller coaster with this car
RalliartRsX
12-24-2019, 12:03 PM
Get a dremel with a polishing pad on it and buff that scratch down. And ull be good togo. Wouldnt replace a head for that.


Second this!
jdmgtom
12-30-2019, 02:18 PM
Get a dremel with a polishing pad on it and buff that scratch down. And ull be good togo. Wouldnt replace a head for that.

Noob question... would you use compound wax?
S14rebuild
12-30-2019, 02:59 PM
Yea, that would work, anything with light abrqsive, used to smoth downw the scratch
jdmgtom
12-30-2019, 05:38 PM
Yea, that would work, anything with light abrqsive, used to smoth downw the scratch

10-4, I'll give it a shot and let you guys know after
mechanicalmoron
12-31-2019, 06:19 PM
How many heads DON'T have a scratched lifter bore? How new is your head?

Try to polish evenly and flatly, don't make waves or let it go off-round.

Since it looks like they did half the damage, did they offer to pay for half the head?
jdmgtom
01-01-2020, 11:05 AM
How many heads DON'T have a scratched lifter bore? How new is your head?

Try to polish evenly and flatly, don't make waves or let it go off-round.

Since it looks like they did half the damage, did they offer to pay for half the head?

Nah, they told me I didn't owe them anything and told me I could find a sr20 head at any junk yard lol not sure if I could use a Sentra sr20 head but I don't even wanna do all of that.
mechanicalmoron
01-01-2020, 11:10 AM
Nah, they told me I didn't owe them anything and told me I could find a sr20 head at any junk yard lol not sure if I could use a Sentra sr20 head but I don't even wanna do all of that.

If you have a spare lifter, you could use that to lap it. If you have the stuck one, you could cut off any area that may be deformed, and put a little handle on it. There's also tiny hones. Either way, run it like a hone.

Check it's size, if you're lucky it's a tight one and you can match (or stay under) the loosest.
jdmgtom
01-01-2020, 11:19 AM
If you have a spare lifter, you could use that to lap it. If you have the stuck one, you could cut off any area that may be deformed, and put a little handle on it. There's also tiny hones. Either way, run it like a hone.

Check it's size, if you're lucky it's a tight one and you can match (or stay under) the loosest.

I don'y have a spare lifter and that sounds too complicated for me. I'll run this head after I buff it and run it and hope that it'll be okay. If not.. then I guess I'm gonna have to do it all over again with a new head.. lol..
S14rebuild
01-01-2020, 04:26 PM
Smooth it out, and stick the lifter in. The lifters body doesnt move up and down, so even if it goes in a little tight ur still golden.




And.... if my machine shop doesnt know enough about where my motor comes from(obvs japan, and cant souce a new head at the local junkyard) i would let them work on it. .02
mechanicalmoron
01-01-2020, 05:18 PM
I don'y have a spare lifter and that sounds too complicated for me. I'll run this head after I buff it and run it and hope that it'll be okay. If not.. then I guess I'm gonna have to do it all over again with a new head.. lol..

That was pretty simple. If it hurts you too badly to spend several seconds thinking with moderate intensity in order to get a good result, cars may be the wrong hobby for you.
jdmgtom
01-01-2020, 08:28 PM
That was pretty simple. If it hurts you too badly to spend several seconds thinking with moderate intensity in order to get a good result, cars may be the wrong hobby for you.

thanks for your input buddy:mrmeph: