Engine body
5.
Check the wear on the valve guides (see "Check-
ing of valve guides") before the valve seats are
treated.
8.
Fit the seals, valves, valve springs, spring washers,
valve lock and valve caps. See "Assembly of cylin-
der head" on page 31.
150
°
Checking of valve guides
Fig. 20. Grinding of valve seat
A= Max. 2.5 mm (.0984 in)
Fig. 22. Clearance, valve - valve guide (cylinder head)
6.
Ream or grind the valve seats (Fig. 20). Grind of
just enough material so that the valve seat has the
right shape and a good mating surface.
Calculate the clearance between the valve spindle and
valve guide.
Wear tolerances:
Inlet valve, max. clearance
Outlet valve, max. clearance
0.20 mm (.0078 in)
0.25 mm (.0098 in)
k
.A
"
der head this must be replaced when the clearance is exces-
sive, even when the valve is new.
Note: Since the valve guides are treated directly in the cylin-
low
Fig. 21. Checking of valve seat
Replace the valve seat when the distance "A" in Fig. 21,
measured with a new valve, exceeds 1.8 mm (.0708 in).
For replacement of the valve seat (inlet) see previous
page.
New seats are grind down so that the distance be-
tween the cylinder head plane and the valve disc
surface "A" is:
MD2O10, MD2020: 0.70-0.90 mm (.0275-.0354 in)
MD2030,
: 0.85-1.15 mm (.0334-.0452 in)
7.
Grind in the valves with grinding paste and check
the contact with marker dye.
29
Categories | Volvo Penta Manuals |
---|---|
Tags | Volvo Penta MD2010, Volvo Penta MD2020, Volvo Penta MD2030, Volvo Penta MD2040 |
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Copyright | Attribution Non-commercial |
(4 votes, average: 4.25 out of 5) Marine readers have rated Volvo Penta MD2010 MD2020 MD2030 MD2040 Workshop Manual 4.3 out of 5.0 based on 4 product reviews.
GOOD AND GOODER S=GOODEST. IS BESTER
jeg skal bruge manualen , til at samle min Volvo penta md 2030 igen.
Ö, hur dka jag veta om det är bra innan jag set produkten.
Pages 58 and 59 are missing from Volvo Penta MD2010 MD2020 MD2030 MD2040 Workshop Manual. I need only these pages at present!