SERVICE MANUAL NUMBER 25
262 CID (4.3L) ENGINES
Regardless of type of equipment, however, it is essential that valve guide bores be free from
carbon or dirt to achieve proper centering of pilot in valve guide, ensuring concentricity.
72338
Measuring Valve Seat Concentricity
Valve Grinding
Valves that are pitted must be refaced to the proper angle. Valve stems which show
excessive wear, or valves that are warped excessively, must be replaced. When a valve
head which is warped excessively is refaced, a knife edge will be ground on part or all of
the valve head, due to the amount of metal that must be removed to completely reface. Knife
edges lead to breakage, burning, or pre-ignition due to heat localizing on this knife edge.
If the edge of the valve head is less than 1/32 in. (0.8 mm) after grinding, replace the valve.
Several different types of equipment are available for refacing valves. The recommendation
of the manufacturer of the equipment being used should be carefully followed to attain
proper results.
a
b
50695
a - 1/3 [.341 in] (8.16 mm)
b - 1/32 [.031 in] (0.79 mm) Min
Index
90-861328--1
NOVEMBER 1999
Page 3A-51
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 1262 CID, Mercury MerCruiser 262 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated Mercury-MerCruiser GM V6 262 CID 4.3L Marine Engines Service Manual Number 25 Sections 1-3 4.5 out of 5.0 based on 4 product reviews. This is great. I really like it. Thank you for providing this valuable opportunity for me.
if I can get the info that would be great
The information given is enoug .
In my opinion this is the best site on the net. Assisting people to do a job correctly and safely.