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Old 08-10-2009, 11:18 PM
GWNorris3rd's Avatar
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Join Date: Jan 2009
Location: Appalachia of California-Fresno
Posts: 75
Wink *UPDATE*Compression Test...how low is low.....

Will I finally did the compression test (normal running temperature and removed the injectors) today and the results are:
Cylinder #1: 400 not bad for a engine with 160,000 and used to use WVO
" #2: 420 even better!
" #3: 320 OK this must be the bad puppy... but wait...
" #4: 380 an improvement but iffy... and last but least
" #5: 160!!! damn it's dead, or nearly... so I retested it three more times with the same reading of 160! I did a valve adjustment about 3,000 miles ago... I added a few drops of Marvel Mystery Oil to #3 and #5 to see if it will help and redo the compression test after the valve adjustment on Friday. I'll keep you posted...

So does anyone have a lower compression number than 160? and if so how long did the car run before dieing all the way?

Well, I did a week of soaking with the Marvel Mystery Oil on #3 and #5 cylinders and checked the valves (both #3 and #5 exhaust valves were tight) readjusted and redid compression test:
#1 400
#2 420
#3 380
#4 380
#5 340
Still not the best but better! Will be driving it hard over to the coast next week then to Malibu for SoCa for the gtg next Saturday. The car doesn't idel as rough and it has lots more power, I don't have to push down on accelerator as far to get it moving and it takes off fast! I will probably do another soak after getting back from SoCa.


9/30/2009: 0-60 in 13 seconds
Not a neck breaker, but it moves!
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'83 300D "Katherine" Anthracite Grey/Java 151,000 miles Blown Engine RIP - rust free car - SOLD


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Last edited by GWNorris3rd; 10-01-2009 at 02:39 AM. Reason: update!
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