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Old 12-31-2009, 03:45 PM
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Join Date: Apr 2003
Location: connecticut
Posts: 2,771
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Make: 2.3 quad 4 w41
Model: oldsmobile
Engine: calais
Andrew's RED 93 achieva SCX

Pictures: http://www.quad4forums.com/forums/album.php?albumid=101

Andrew (thavidu) is going to need a place to keep all questions in order when it comes to keeping his new SCX on the road. I figured I would start the thread for him, and update you on the progress.

I originally bought this car in june of 08, the previous owner had bent all 8 intake valves. Not sure on the history at all but it has one aftermarket piston which seems to be from long ago as it is a 10:1 like the others. Anyways, I slowly worked on the car and rebuilt the motor with an 086 head and HO cams. The w41 cams were sacraficed for another motor. It also has a brand new cluch, and TO bearing.

It took me forever and a day, but I fired the car up today for the first time ever. It appears to be running on 2 cyl, which I suspect is a Injector issue from sitting. I had flushed the tank when I got the car and it now has some old premium from june of 08, so that is 18 months old. I plan on having the motor sorted out by tomorrow.

I will update pictures as we go.
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  #2  
Old 01-01-2010, 01:19 PM
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Join Date: Apr 2003
Location: connecticut
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Make: 2.3 quad 4 w41
Model: oldsmobile
Engine: calais
Update: and not a good one.

I ran the car and checked the temp on the exhaust manifolds to look for a dead cyl pair so I could chase down what I hoped was a bad coil or injector. But all CYL's were geting hot.

So I did a compression test. TC - 210-210-90-210 transmission

Not good. I am thinking that I may have bent intake valves on this when assembling it. My question is why is it geting hot on that cyl if its not got compression. I'm now hoping that the lifters on that cyl are not pumped up and that when it is running the numbers come up. All 4 plugs were severly fouled from the bad gas so I need to swap plug before doing any more testing.
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  #3  
Old 01-01-2010, 01:28 PM
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Join Date: Jun 2006
Location: Calgary, Alberta Canada
Posts: 6,822
Make: Pontiac
Model: 1991 Grand Am LE-W32 coupe
Engine: LGO in 'Rocketparts' trim.
here's to crossing fingers that you figure this out ~ and it doesn't need a tear down to fix!!
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Old 01-01-2010, 01:41 PM
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Location: Parma, OH
Posts: 501
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Make: Toyota
Model: "TRD" Corolla
Engine: 1.8L (retarded JZ RPO Code)
oh, im crossing my fingers alright i want this car more than anything
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  #5  
Old 01-01-2010, 07:21 PM
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Join Date: Nov 2007
Location: Cheektowaga NY
Posts: 3,450
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Make: Oldsmoble(s)/Chevy/Pontiac/GMC(s)
Model: 91' W41x6/90' W40HC/92'SCXx2/99'S-10/W41 Vert/13' K2500/51' GMC 2.5Ton/89' C2500
Engine: W41x8/W40HC/2.2SFI/6.0L/298ci I6/350ci V8
It will still get hot if its still combusting fuel/air. Were all the temps the same across the board?
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#83 Quad 442 W4OHC

-1991 Quad 442 W41............-1990 Quad 442 W40HC
-1991 Quad 442 W41 C41......-1988 I Series Clone
-1991 Quad 442 W41 C41......-1994 GA SE OHC HO
-1992 Achieva SCX C41.........-1992 Achieva SCX (WT)
-1992 Achieva SCX (NB)........-1992 Achieva SCX (WT)
-1990 Quad 442 W40............-1988 I Series 4Dr(Race)
-1991 Quasar GTZ
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  #6  
Old 01-01-2010, 08:38 PM
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Make: 2.3 quad 4 w41
Model: oldsmobile
Engine: calais
They were all equally hot, and gaining at the same rate. I guess I'll swap plugs tomorrow, and hope that running the piss out of it gets those rings to seat? Or makes it easier to pinpoint the problem by putting a lifter through the cam tower.
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  #7  
Old 01-01-2010, 08:40 PM
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Join Date: Nov 2007
Location: Cheektowaga NY
Posts: 3,450
Classifieds Rating 100% (25)
Make: Oldsmoble(s)/Chevy/Pontiac/GMC(s)
Model: 91' W41x6/90' W40HC/92'SCXx2/99'S-10/W41 Vert/13' K2500/51' GMC 2.5Ton/89' C2500
Engine: W41x8/W40HC/2.2SFI/6.0L/298ci I6/350ci V8
Yea sounds like a stuck valve, But could be an issue with the camshaft/lifter
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  #8  
Old 08-12-2012, 08:55 PM
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Join Date: Apr 2003
Location: connecticut
Posts: 2,771
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Make: 2.3 quad 4 w41
Model: oldsmobile
Engine: calais
So this is still my car, and its been sitting long enough. I pulled the head today. The head looks awesome. Cyl wall looks good on the low compression cyl, but the transmission side cyl (4?) has score in it that I can catch my fingernail on.

At this point I know the motor is coming out and the block is going to the machine shop. No idea why there is low compression, but the piston rings seem to possibly be a culprit. Not sure what the PO did to the block, and apparently I need to know, because one cyl is bigger than stock rings I think and the other needs to be. No idea how the cyl got scored, it was not that way when I assembled it obviously. I think it may be the oil control ring dimensions.

More coming, but not for a while.
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  #9  
Old 08-12-2012, 10:23 PM
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Join Date: Sep 2004
Location: Peoria, IL
Posts: 3,018
Make: '88 Chevy / '91 Olds
Model: Quad Foursica / Quad 442 W41
Engine: Built '91 2.3L / '91 2.3L
You might want to check the valves/seats for leakage. (I've had problems with valve sealing before, myself.)
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  #10  
Old 08-13-2012, 11:58 AM
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Make: 2.3 quad 4 w41
Model: oldsmobile
Engine: calais
The head was straight from the machine shop prior to original assembly. Were not ruling it out though.
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