|
|
|
|
| Author |
|
|
JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
|
Valve guides and valve stem seals
OK, started to replace everything about the valves except the intake valves themselves, but noted that the valve guides are allowing little to no play, even with the new exhaust valves. I am thinking about keeping the old valve guides installed and just replacing everything else. Thoughts????
I was also wondering if I should replace the valve stem seals or just leave the old ones on also. The old ones appear to be in good shape, but appearances are just that. I have no imperical data to help make a decision. Everything in this motor has been well within spec with great amounts of room for further wear. The cylinder heads appear almost new! '83 Targa, 3.0, ~103,000 miles, recorded as never re-built (I do not trust PO records  ), Car from South of Houston, Texas, working for a daily driver that the wife and I can take on vacations and stop driving those darn big trucks! Thanks for any input...
__________________
David '83 SC Targa (sold  ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
||
03-03-2002, 08:24 AM
|
|
|
Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,431
|
intake stems are larger than exhaust, and can run with less clearance to the guide. there should still be some slightly noticable movement when you move the valve back and forth. due to the potential for seizing, the exhaust guides need slightly more clearance to the stem. the guides do most of the heat transfer out of the valve. did you mic the intake stems for taper? they get quite worn. use new seals, the white ones. they're cheap.
__________________
https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
||
|
03-03-2002, 08:34 AM
|
|
|
JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
|
John,
The amount of movement noticed in the valve itself with the old valve guides is minimal (~.01 mm deflection) or not measurably more than the new valve guide and the new and old valves. The noses of the old intake valve guides look almost new. The noses of the old exhause valve guides show slight wear and darkening exhibited from normal use. Any help on how to remove the old stem seals and apply the new ones without damaging anything is greatly appreciated. I have all the new parts sitting here on the living room floor. (Glad the wife isn't here to send me to the '20 degrees garage floor!!!!)
__________________
David '83 SC Targa (sold ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
||
|
03-03-2002, 08:52 AM
|
|
|
Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,431
|
pop them off with a screwdriver. try not to dent the head where you lever the blade against the head. the install tool is a 13mm deep socket, cleaned of all the dirt inside, an extension, and a hand twist knob (optional equipment).
__________________
https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 Last edited by john walker's workshop; 08-25-2007 at 08:02 AM.. |
||
|
03-03-2002, 09:36 AM
|
|
|
JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
|
John,
Thanks a bunch!!!! Don't care what Superman has to say about ya, your tops! I am now on my way to cleaning out the car parts (completing the heads) from the living room before the wife gets back home next weekend. I really appreciate the advise and care,
__________________
David '83 SC Targa (sold ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
||
|
03-03-2002, 09:41 AM
|
|
