When to do a valve adjustment on a Mercedes 450SL?
Mercedes recommends doing a valve check and adjustment every 10,000-12,000 miles. Now the truly easy part, prepping for the adjustment. You will need to remove the fan, shroud, and upper radiator hose. NOTE: Be sure to replace any lost coolant when reassembling the system.
When did the Mercedes 450SL roadster come out?
450 SL Production Schedule Vehicle Year # Produced 450SL Roadster R107 1975 6,011 450SL Roadster R107 1976 6,625 450SL Roadster R107 1977 8,110 450SL Roadster R107 1978 7,434
When did Mercedes 450SL need feeler gauge adjustment?
As it pertains to many classic diesel or gasoline Mercedes-Benz, the job is very straight forward. From what I understand the last year the 450SL needed feeler gauge type adjustment was 1975 as the 1976 received hydraulic lifters. Regardless, if you are working with a pre-hydraulic lifter Mercedes, it’s time to check out your clearances.
Mercedes recommends doing a valve check and adjustment every 10,000-12,000 miles. Now the truly easy part, prepping for the adjustment. You will need to remove the fan, shroud, and upper radiator hose. NOTE: Be sure to replace any lost coolant when reassembling the system.
Can a hydraulic lash adjuster be tested on an OHC engine?
Some hydraulic lash adjusters for OHC engines can be tested in a similar manner to that described for hydraulic valve lifters. Generally, hydraulic lash adjusters can not be dismantled, but they can be bled to remove air. This also provides limited cleaning.
How is a hydraulic valve lifter test for leak rate?
Hydraulic valve-lifters are tested for their leak down rate. A good lifter will leak down slowly but, if it’s plunger is sticking, the leak down rate will be too slow.
Can a hydraulic lash adjuster be bled of air?
Hydraulic lash adjusters can be bled of air by working them in a container of distillate. Clean distillate must be used. To prevent contamination, the outside of the adjuster should be cleaned before it is an immersed for bleeding. If a lash adjuster is still noisy after bleeding, it will have to be renewed.