View Single Post
RarlyL8 RarlyL8 is offline
Crotchety Old Bastard
 
RarlyL8's Avatar
 
Join Date: Jan 2000
Location: Huntsville, AL
Posts: 12,690
Garage
The bi-metal strip stops moving at normal engine operating temperature once the temperature at the WUR has equilibrated. If the temperature at the WUR is further increased or decreased the bi-metal strip will move accordingly.
To directly answer your question, I do not know if the bi-metal strip ever unseats itself. I doubt it due to the mechanical function it performs. The bi-metal strip has a range of motion that diminishes at the extremes. That range of motion is compromised with age, one reason why aging WURs go off-spec on their own, usually first seen as a lean cold start and the classic "chugging" at low idle.
__________________
RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds
'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 02-05-2007, 08:55 AM
  Pelican Parts Technical Article Directory    Reply With Quote #2 (permalink)