 ATTN: Engine guys - need a solution, Just a couple of questions |
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| ahdoman |
  Feb 27 2007, 08:15 PM
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#1
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It's phonetic...Ah-D-O-Man (Audioman)  Group: Members Posts: 667 Joined: 7-November 05 From: Santa Clarita, Ca. Member No.: 5,084 Region Association: Southern California  |
2.0 engine is out of the car with trans still attached.
Question #1 - I need to check compression (I know, it's easier before the engine is out but it's out). If I connect the battery (+ & -) to the solenoid will the engine turn over? Will this damage anything. Obviously I am not trying to start it just want to turn it over to measure compression. Question #2 - If I find that compression varies on some cylinders I would like to be able to determine if it is rings or valves leaking. My plan was to put my rubber tipped blower nozzle into the sparkplug hole, pressurize and listen into case, intake or header to see if I hear a leak. The problem is as soon as I pressurize the cylinder the piston moves to the bottom of the stroke. Any ideas as to how I can keep the cylinder on TDC? |
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| SLITS |
Feb 27 2007, 09:34 PM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
While a leakdown test is best (you can buy a leakdown tester at Harbor Freight for about $65), you can do a compression test.
Hook the + lead of a battery charger or battery to the normal lead on the solenoid. Hook the negative lead to the starter case, tranny or engine. Using a screwdriver, jump from the + big lead to the spade terminal on the starter ... the engine will spin just like you were using the key. Make sure you hold the throttle wide open and pull all the plugs prior. |
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| ahdoman |
Feb 27 2007, 09:55 PM
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#3
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It's phonetic...Ah-D-O-Man (Audioman) Group: Members Posts: 667 Joined: 7-November 05 From: Santa Clarita, Ca. Member No.: 5,084 Region Association: Southern California |
QUOTE(SLITS @ Feb 27 2007, 07:34 PM)  While a leakdown test is best (you can buy a leakdown tester at Harbor Freight for about $65), you can do a compression test. Hook the + lead of a battery charger or battery to the normal lead on the solenoid. Hook the negative lead to the starter case, tranny or engine. Using a screwdriver, jump from the + big lead to the spade terminal on the starter ... the engine will spin just like you were using the key. Make sure you hold the throttle wide open and pull all the plugs prior. Thanks Slits - If I do this wrong does it become an arc welder? Hey McMark... (IMG:style_emoticons/default/chair.gif) thanks for clarifiying that! |
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Posts in this topic
ahdoman ATTN: Engine guys - need a solution Feb 27 2007, 08:15 PM
911quest Buy a leak down gauge the piston has to be a compl... Feb 27 2007, 08:18 PM Johny Blackstain Get the flywheel lock tool.
http://cgi.ebay.com/eb... Feb 27 2007, 08:24 PM Crazyhippy Step on the brakes....
The flywheel lock is the ... Feb 27 2007, 08:45 PM ahdoman Any way to do this w/o removing the trany?
Also ... Feb 27 2007, 08:50 PM
McMark
Then you're not really at TDC. ;) Feb 27 2007, 09:50 PM
Jake Raby The leak down test is a true disgnostic evaluation... Feb 28 2007, 08:34 AM |
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