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  #1  
Old 08-24-2015, 10:35 AM
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Adjusting valves - stupid question - help

I think this is a stupid question but I want someone to tell me I did it right (or wrong) so I'll know.

Over the weekend I adjusted the valves on an M189 engine. M189 has a big harmonic balancer on the front of the engine with 6 mm holes drilled into it so turning the engine by hand is very easy using a couple of metal rods.

I turned the engine so the cam on the first valve was pointing opposite the rocker arm. Then I adjusted that valve to its specification (I think .10 for intake, .25 for exhaust but I might have those switched). Then I turned the engine so the next valve that was almost pointing opposite its rocker was in position and adjusted that valve. etc. So I turned the engine 12 times to adjust 12 valves.

So in the attached picture, the next engine turn would be to adjust the 3rd cam into position, then the next turn would be to adjust the 1st cam into position, then the next turn would be to adjust the 6th cam into position, etc.

Did I do that right?
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Adjusting valves - stupid question - help-newinjectorblocks4.jpg  
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  #2  
Old 08-24-2015, 12:39 PM
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Sounds right. If you look at your photo, you will see that there are four valves that can be adjusted at that camshaft position. The lobes do not have to be exactly opposite the follower. Just off the beginning/end of the lobe.

Saves bouncing up and down to wrench the motor at the crank, if you haven't taken the fan off.
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Old 08-24-2015, 01:02 PM
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Originally Posted by ScooterABC View Post
I think this is a stupid question but I want someone to tell me I did it right (or wrong) so I'll know.

Over the weekend I adjusted the valves on an M189 engine. M189 has a big harmonic balancer on the front of the engine with 6 mm holes drilled into it so turning the engine by hand is very easy using a couple of metal rods.

I turned the engine so the cam on the first valve was pointing opposite the rocker arm. Then I adjusted that valve to its specification (I think .10 for intake, .25 for exhaust but I might have those switched). Then I turned the engine so the next valve that was almost pointing opposite its rocker was in position and adjusted that valve. etc. So I turned the engine 12 times to adjust 12 valves.

So in the attached picture, the next engine turn would be to adjust the 3rd cam into position, then the next turn would be to adjust the 1st cam into position, then the next turn would be to adjust the 6th cam into position, etc.

Did I do that right?
As pictured, yes those would be the next two valves.

Adjusting each valve with the lobe at 180 to the follower will ensure that the cam is on its base circle, although, as noted above, not entirely necessary.
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Old 08-24-2015, 02:00 PM
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Thank you both. It sounds like I did fine, but positioning each lobe was over-kill. At least I didn't do something bad.
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  #5  
Old 08-25-2015, 01:58 PM
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and you did em when they were good and cold right
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Old 08-25-2015, 02:38 PM
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Originally Posted by meltedpanda View Post
and you did em when they were good and cold right
Oh yes. The car isn't running again. I did them when installing the injector blocks and gaskets and injectors - you can see the gaskets in the picture. Hopefully that will solve some of my vacuum problems. I need to set the static timing and try and get the car to start again (which it almost did) but I think I have idle set too low after plugging up the MASSIVE vacuum leak to the brake booster. I think the idle was tuned expecting a leak.
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Old 08-25-2015, 09:22 PM
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great keep us posted!
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2011 Porsche Cayman - Bond,James Bond
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16 F350 6.7 Diesel -THOR
07 Lexus RX 350 - Lexi
14 38HP John Deere 3038E Tractor -Mean Green
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71 220 - W115-Libby ( my first love) -SOLD
73 280 - W114 "Organspende" Rest in Peace
81 380 SL - Rest in Peace
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Old 08-26-2015, 07:11 AM
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Did you rebuild the brake booster or disconnect it? Is your brake booster located at the firewall or next to the radiator?
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Old 08-26-2015, 09:48 AM
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Did you rebuild the brake booster or disconnect it? Is your brake booster located at the firewall or next to the radiator?
Firewall. And I capped off the line coming from the intake manifold with a 3" hose and a bolt. I have verified that the vacuum hose or the booster have huge leaks and I haven't checked to see if it's the hoses or the booster since those aren't relevant right now.
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