Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: 2002 st170 head problem. Head for sale?
Pigsy

posted on 8/8/18 at 10:29 PM Reply With Quote
2002 st170 head problem. Head for sale?

On my st170 2002 alda, I have discovered that the intake valves are not sealing for some reason. Piston 3 just exhaling everything out of the gsxr750 no3 inlet, yes inlet, not outlet. Nightmare. Anyone know of any problems associated with the 2002 st170 head that would cause this?
Im half way through taking the head off when all will be revealed. Stopped at 11.00 this evening. Engine was from ebay over a year ago. Supposedly in perfect condition.

Alternatively, does anyone have one in good nick around the Southampton/Hants area. I can travel a bit too.

Is this a TRADE ADVERTISEMENT?? Click HERE to report it!

View User's Profile View All Posts By User U2U Member
Pigsy

posted on 8/8/18 at 10:30 PM Reply With Quote
A full engine would be ok.
View User's Profile View All Posts By User U2U Member
RWD Focus

posted on 9/8/18 at 05:04 AM Reply With Quote
I have a good head but in West Yorkshire






View User's Profile View All Posts By User U2U Member
Mr Whippy

posted on 9/8/18 at 06:27 AM Reply With Quote
why not just get the valve seats redone? doesn't usually cost all that much and you start with a clean slate
View User's Profile E-Mail User Visit User's Homepage View All Posts By User U2U Member
cliftyhanger

posted on 9/8/18 at 07:00 AM Reply With Quote
You really need to see what the issue is. It may be simple, but unlikely to be anything horrendous. If you get it sorted you can be confident that the head is all ok.
BTW when I took my "good" ST engine apart i found the rings were very gunged up and I am not certain they would have freed up. A hone and new set of rings was not expensive. And while in there, new bearings and ARP bolts.....but hopefully refreshed for many thousands of miles.

View User's Profile View All Posts By User U2U Member
Pigsy

posted on 9/8/18 at 07:28 AM Reply With Quote
Thanks. all will be revealed in a couple of hours. It may be a bent valve. Opinions vary on conflict or non conflict engine. It was passing a huge amount of compressed air back out the inlet.
View User's Profile View All Posts By User U2U Member
Pigsy

posted on 9/8/18 at 06:25 PM Reply With Quote
It is from two bent valves. No damage to piston thankfully. I will get a set tomorrow and lap them in. There was about a 1mm gap to one edge on both. One of the risks of an ebay/breaker engine.
Hope to have it done tomorrow. :-)

View User's Profile View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.