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NSI compression

Matronics Email Lists Forum Index -> Kitfox-List

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Fox5flyer
Guest

Posted: Sat Apr 05, 2008 3:52 am Post subject: NSI compression

Hey folks. Has anyone here done head work on there NSI EA81 N/A?  My

engine has been running just fine, but I've been noticing a  new

difference in my EGTs Normally they were nearly identical at  cruise power, but suddenly they're 150 degrees different.  So, I did a  normal automotive type compression check which was

reasonably good, but then  I did a differential check and it's

appearing that I may have some bad  valves. My highest is #4 at 77/80

and weakest one is #3 at 50/80. #2 is 76/80  and #1 is 60/80 . Both of

the weak ones are on the pilot side with air  hissing in the exhaust.

I can hear a gurgling in the oil tank on all four,  but I don't know

if that is normal or not since they all sound the same and  the

starboard cylinders have pretty good compression. I'm fairly

convinced  I need to do a valve job, but what I need is specific

teardown/repair  instructions, gasket kit, possibly valves, and someone

to do the actual valve  job properly.

Anybody like to give their opinion/recommendations on this?  Sources

for the above parts would also be appreciated.

If I go local for  parts, what engine do I tell them I have?

Deke

 S5 NSI EA81 NA

 380 hours

 NE Michigan

  

   [quote][b]

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n10pg(at)neo.rr.com
Guest

Posted: Sat Apr 05, 2008 5:05 am Post subject: NSI compression

Hi Deke:



Why don't you give Ron Carr at RAM Performance a shout. He has done my

engine. They are located in Clinton OH, a few miles SW of Akron. Their phone

is (330) 882-6255

Peter Graichen

http:/home.neo.rr.com/n10pg/kitfox.htm 



________________________________



From: owner-kitfox-list-server(at)matronics.com

[mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of fox5flyer

Sent: Saturday, 05 April, 2008 07:47

To: Kitfox List

Subject: NSI compression

 Hey folks. Has anyone here done head work on there NSI EA81 N/A? My

engine has been running just fine, but I've been noticing a new

difference in my EGTs Normally they were nearly identical at cruise power,

but suddenly they're 150 degrees different.  So, I did a normal automotive

type compression check which was

reasonably good, but then I did a differential check and it's

appearing that I may have some bad valves. My highest is #4 at 77/80

and weakest one is #3 at 50/80. #2 is 76/80 and #1 is 60/80 . Both of

the weak ones are on the pilot side with air hissing in the exhaust.

I can hear a gurgling in the oil tank on all four, but I don't know

if that is normal or not since they all sound the same and the

starboard cylinders have pretty good compression. I'm fairly

convinced I need to do a valve job, but what I need is specific

teardown/repair instructions, gasket kit, possibly valves, and someone

to do the actual valve job properly.

Anybody like to give their opinion/recommendations on this? Sources

for the above parts would also be appreciated.

If I go local for parts, what engine do I tell them I have?

Deke

S5 NSI EA81 NA

380 hours

NE Michigan

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

Fox5flyer
Guest

Posted: Sat Apr 05, 2008 5:20 am Post subject: NSI compression

Thanks Peter.  I'll do that.

Deke

do not archive



---

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