![background image](http://html1.mh-extra.com/html/mack/e-tech-sb-210-034/e-tech-sb-210-034_service-manual_3224387205.webp)
REPAIR INSTRUCTIONS
Page 189
186
Figure 186 — Valve Guide Dimensions
INSPECTION
Worn valve guides may result in poor valve-to-
seat contact, valve damage or oil consumption.
1. Inspect the valve guides for wear, damage,
cracks and looseness. Use a small bore
gauge (1) to obtain an accurate valve guide
bore (2) measurement. Refer to Figure 187.
187
Figure 187 — Measuring Valve Guide Bore
2. Use a depth gauge to check valve guide
extension. Refer to Figure 188.
188
Figure 188 — Checking Valve Guide Extension
1. Exhaust Valve Guide
2. Inlet Valve Guide
3. Valve Guide ID
4. Top End of Guide to
Valve Spring Seat
5. Valve Guide Extension,
Fire Deck to Top of
Guide
6. Valve Guide Bore in
Head
7. Valve Guide OD
1. Bore Gauge
2. Valve Guide Bore
5_106_00.bk Page 189 Friday, August 4, 2000 11:17 AM
BDC for engine manuals and specs