Thread: 300D 0PSI Compression No.5 after highway run…Head gasket, burned valve, worse?
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  #18  
Old 05-06-2019, 10:36 AM
Maxbumpo Maxbumpo is offline
Diesel Preferred
  
Join Date: Oct 2007
Location: Charleston SC
Posts: 2,788
What is the clearance on the valves for #5?

Compression test is meaningless without a valve adjustment - you are wasting your time until you complete that first, and then test the compression.

Remember that a diesel engine needs compression to ignite the fuel, so a tight valve = low compression = no ignition of the fuel. Hard to do a lot of damage after the valve(s) get to the point that there is zero compression, but you may indeed have burned a valve.
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M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC
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