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#1
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Compression test without valve adjustment first...
I purchased a cheap compression tester from Harbor freight on Tuesday. I'm really excited to check the health of my engine but haven't received my wrenches to do a valve adjustment first.
Is it a total waste of time to check the compression without doing a valve adjustment first? digi
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1984 300td euro turbo |
#2
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Yes, its a waste
Wait and do the Valves.
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------------------------------- '85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit) '82 300D, 'Tex', 228k body / 170k engine ... summer car '83 300TD Cali Wagon 210k, wife's car |
#3
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If you have a feeler gage, you can tell if any of your valves are out of adjustment. If they do not need adjustment, there is no reason not to do a compression test.
You may waste the time that it takes to pull the valve cover, affected vacuum hoses and throttle linkages in this process.
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CC: NSA All things are burning, know this and be released. 82 Benz 240 D, Kuan Yin 12 Ford Escape 4wd You're four times It's hard to more likely to concentrate on have an accident two things when you're on at the same time. a cell phone. www.kiva.org It's not like there's anything wrong with feeling good, is there? |
#4
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Quote:
Were it me, I'd run a warm (85C.) compression check just for the fun of trying out my new guage. The valves have to be really off before they will affect compression readings and its not that much work to do over should need be. Joseph |
#5
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I agree, but learning is half the fun- I would take a compression test warm (unadjusted) and then a warm adjusted reading-always satisfying to see a low cyclinder pop up 50 or more pounds via valve adjustment
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#6
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Hey,
Why dont you check your oil level after you drain the motor before you add the new oil? You could check your tire pressures just before they fit new tires. Maybe check your battery acid SG before you charge it.
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Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort.... 1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles 1987 250td 160k miles English import 2001 jeep turbo diesel 130k miles 1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving |
#7
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Hey,
Why dont you wipe before you poop?
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1984 300td euro turbo |
#8
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wow, guys, kinda rough with the ribbing...
he's got a new tool. I LOVE NEW TOOLS! ya gots to play with them when they arrive! I just got my new spring compressor... I am itching to tear something apart.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!! 1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! |
#9
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Quote:
Well now, I was talking about the joy of learning and trying out a new tool. However, if you do get good compression numbers before a valve adjustment - and assuming good oil pressure and no noise like rocks in a tin can - you know have a generally sound engine. If the compression numbers are not so good, then you need to check for valve clearance, faulty valves, stuck or worn piston rings, leaking head gasket & etc. Not to say of course that valve adjustments and other normal maintainence shouldn't be done as MB recommends. As to your other suggestions, I do see some value to each one - except I would check the oil level before draining. The above all in a friendly spirit. Joseph |
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