the short lived sr.......

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Dcasil80slider
Posts: 237
Joined: Wed Dec 07, 2005 1:59 pm
Car: 1993 240sx se sr20det fastback 5speed
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So had the 240 out a few weeks ago just cruisin along all of a sudden no boost in 4th or 5th so i hop off the highway and the motor starts runnin like s*** below 3k rpms i make it to a parking lot and im losing oil and i couldnt find where it was coming from. parked the car for a while went in and got somethin to eat, grabbed some oil from wally world and dumped it in. got the car started but it was running rough had to keep it above 1500rpm to keep a steady idle. i made it maybe 4 miles down the road and it stalled again and as i was trying to start it it seemed to lose all compression as if i had just taken the spark plugs out of the head. got it home last week and ran a compression test 0,0,90,0 so i put a little bit of oil in the cylinders and got 0,0,120,0. im at a loss here guys i wasnt driving it hard or reving above 7k any ideas ???

oh and the motor setup is solid lifter conversion, crower 272s, titanium valves and retainers, gt2871 turbo, 550cc injectors, je pistons and eagle rods. if anyone has and ideas please let me know

little more info took the valve cover off and found that the crankcase had been pressurized which is what pushed the oil into my intake tube. but still no idea what is going on, im thinking blown oil pump
Modified by Dcasil80slider at 1:01 AM 5/31/2009


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slociv
Posts: 29
Joined: Wed Nov 06, 2002 4:30 am
Car: A shop full
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If you haven't already, pull the valve cover. Are you running rocker arm stoppers, cause you def. should be. Sounds like you threw the some rocker arms. Is the head loud? What tunning do you have, a simple back fire can throw the rockers off, hopefully you didn't bend a vavle or 6. With numbers like that its not looking to be good, to produce a zero something is very wrong, way more than just washing out rings or a headgasket.


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Justin35ll
Posts: 1421
Joined: Fri Oct 17, 2008 6:57 pm
Car: s13 coupe sr20det

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Yeah, something is wrong if you have 0 compression, def pull the valve cover and check it out

Dcasil80slider
Posts: 237
Joined: Wed Dec 07, 2005 1:59 pm
Car: 1993 240sx se sr20det fastback 5speed
Contact:

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did pull the valve cover. the valvetrain is sounding normal but on #4 cylinder closest to the firewall the rockerarm intake side has so much play in it that when the cam lobe is not on it i can dislocate the rockerarm with my finger. and no i am not running rocker arm stoppers and no i did not bend any valves i know that sound and i did not hear it. any other ides guys ?just seems so weird to me that only one cylinder is making compression. i ran another comp test and even with the injectors unplugged so i dont wash down the cylinder walls i was getting the same results.................


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