I did the valve adjustment on the wife's car this afternoon...easy job, not the first time though. I have noticed the last couple times I have done this that the exhaust valves are usually dead on, but the intake valves are all way too tight. Why is this?

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Mike

'80 300D
'84 300D
'85 300D
'87 300D

I have noticed this also...especially on the turbo engines. All I can say is that the intake valve must be softer on the valve face.

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

When ever I adjust valves on a 61* engine all of the valves are usually tight. Seems odd that they tighten as opposed to loosen with use.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

Just did valve adjustment for the first time on my car - I've noticed just the opposite: all the Intake valves were OK, but ALL of the exhaust valves were really tight! I wondered why that is myself?!

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1987 Mercedes 300SDL; SOLD
1985 Mercedes 300D; SOLD
2006 Honda Pilot - wife's ride; 122K;
1995 Toyota Land Cruiser - 3X locked; 182K

Hey Mercfan, Is your DODGE stock? Man there IS some power potential there!! I have mine lightly pumped and .......WOW>

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My Truck.. 2007 DODGE, 5.9 Cummins, 6spd stick, 4X4. My car..1977 240D, OTHER WHEELS...1955 VW Oval window bug, European Delivery (Holland) with a 1700cc, 2 barrel, Porsche drum brakes. 1939 WILLYS Pick-up. 1967 Triumph 200cc Tiger Cub. 1976 Honda 550F 4cyl Motor Cycle.

I couldn't tell you when I last had to adjust the exhaust valves on this car. They always seem to be spot on, but the intake valves are always way too loose. I would think they would all have to be adjusted about the same amount.

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Mike

'80 300D
'84 300D
'85 300D
'87 300D

The valve continually pounds itself into the seat and, over time, the seat gets compressed. When the seat gives way to the valve, the spring pushes the valve closer to the camshaft.

Well that makes sense.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine