|
|
|
|
|
#1
03-22-2009, 09:35 AM
|
|||
|
|||
Do valve clearances get tight or loose?
Mine is due for a check and adjustment soon. I was wondering which way the clearances went on the Intake and Exhaust valves. Thanks
__________________
1982 300SD 
|
|
#2
03-22-2009, 09:36 AM
|
||||
|
||||
|
tight over time
|
|
#6
03-22-2009, 11:45 AM
|
|||
|
|||
|
What counts is whether you are dealing with an overhead cam like our diesels..or a pushrod system like most old american cars... a 6 cylinder chevy 250 from 1968 loosens up... our overhead cam engines get tighter... and the reason it is important is that half the cooling of the valves comes from convection .... being held tightly against the head ...
This is what really keeps the valve from burning in short order. While it is a pain to adjust in some ways.. I suggest you look at what it took to adjust a double overhead cam 6 cylinder like the 1957 Jag 4.2 engine... when you try to explain why you did not set ours often enough to keep the valves from burning... Excuses won't fly in that case.
|
|
#7
03-22-2009, 12:53 PM
|
||||
|
||||
|
Quote:
Jeremy
__________________
 "Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
|
|
#8
03-22-2009, 02:56 PM
|
|||
|
|||
|
C'mon... it's not so bad. Measure and record all the clearances first. Find difference from specification (plus or minus) to see how much thicker/thinner a shim is needed. Remove cams. Remove bucket lifters. Remove shims from underneath, measure. Use calculations to find new shim thicknesses required. Play musical chairs with existing shims, order new ones as required. Reassemble, check all work!
__________________
1987 W201 190D
|
|
#9
03-22-2009, 05:53 PM
|
|||
|
|||
|
JonL described it... you have to take the cams OFF the head to adjust the valves....
|
|
#10
03-22-2009, 08:10 PM
|
||||
|
||||
|
All older BMW's require valve adjustments too. There pretty easy, just an eccentric at the rocker tip where it contacts the valve tip. The only newer ones are the S54 engines of the M-Power cars. Thoese are a bit harder, little shims that sit on the end of the valve tip. And the shims are small enough to drop down the oil drain back holes!
Still the OM61X arnt the most fun IMO, kinda a pain.
__________________
87' 300D, Currently undergoing an OM606 swap/build!  SUPERTURBO!!!03' 2500HD Dmax + goodies! 82' 300SD, parting out! 93' 300TE 4matic, parting out! 83' 240D Project Cheap Drive 89' 300E, parting out! 74' Datsun 510 wagon  88' RX7 10thAE, 13B track car build soon Skippy~ As for perception: Drive what you like and can afford. Those who don't like it can supply vacuum to one of your components. LOL  If you need parts, I have some!
|
|
#12
03-23-2009, 09:31 PM
|
||||
|
||||
|
617 valve adjustments are easy. I can do one in 30-40 mins start to finish even if I am going at a leisurely pace.....slightly longer on a W123 because its a pain to get the valve cover off.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
|
 |
| Bookmarks |
|
|
Linear Mode
