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11-18-2013
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#1 |
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Join Date: Dec 2012
Location: NC
Posts: 1,783
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Re: TOP END REFINISHING
Memory / Calibration Module to Marc... (and maybe it WILL get there quicker
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11-18-2013
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#2 |
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Join Date: Dec 2012
Location: NC
Posts: 1,783
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Re: TOP END REFINISHING
Any tricks to getting on a new UN-stretched serpentine belt? This Dayco is a bear here...
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11-18-2013
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#3 | |
  
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,816
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Re: TOP END REFINISHING
Quote:
 Then....having someone hold the tensioner open.....slip belt under water pump pulley (the back side of the belt) onto the smooth surface of the water pump pulley. Actually I have an aluminum Water Pump pulley with NO lip. For your stock situation maybe the alternator is the final pulley. Last edited by Dynomite; 11-18-2013 at 04:24 PM. |
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11-18-2013
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#4 | |
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Join Date: Dec 2012
Location: NC
Posts: 1,783
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Re: TOP END REFINISHING
Quote:
What IS spec length? Advance's database has some L98 parts indexed as LT5... ed.: Dayco web info shows correct This product is a fit for your: 1990 Chevrolet Corvette ZR-1 5.7L MFI DOHC 8cyl Part Number: 5060805 Warranty: 3 YR |
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11-15-2013
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#5 |
 Join Date: May 2013
Location: Beaver, PA
Posts: 515
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Re: TOP END REFINISHING
OK it looks like you have the voltage to the fuse on the orange wire... The blue wire should go to the vac pump. Maybe jumper across the terminals to see if the pump runs?
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11-15-2013
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#6 | |
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Join Date: Dec 2012
Location: NC
Posts: 1,783
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Re: TOP END REFINISHING
Quote:
I thought about that, but the pump ran fine before, and the battery was un-plugged from before wrench 1 turned a bolt. So test for a good ground, and good power. Then what I saw comin' IN bothered me. Isn't 11.77 V reflective of a problem? Cause it sure wouldn't drive the pump... I went to FSM, and schematic shows 12V from IG Switch, to splice S239 near Cruise Control Module, P side UNDERdash, and from there, to 1) 2' vac pump, through fuse, 2) Power Window Circuit Breaker @ Main Fuse Panel, and 3) A/C Fuse. My plan was to test for identical 11.77 V @ '2', and '3', and then work back to IG Switch OUTput, and see if it ALSO was out-putting 11.77 V But the best laid plans of Schrade & men oft go awry. And this job is in regression, with a decay rate seeming exponential in proportion. The IAC connector gasket fell off. I unbolted the TB to look, and now 1 of the nuts from the TB linkage / cam shield fell off. It's not in the induction port, but now that I thought longer on the IAC gasket, there is the most remote of possibilities that IT found it's way into #2. |
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11-15-2013
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#7 |
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Join Date: May 2013
Location: Beaver, PA
Posts: 515
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Re: TOP END REFINISHING
I'm thinkin that your dropping about 1/2 volt or so between the battery and the fuse connection through the ign switch and wiring for the vac pump. Possibly a slightly resistive connection but I would make sure that your battery is fully charged since you were doing fuel pump testing and they draw at least 4 amps each I think. Also, since that vac pump ckt is separate from the DIS module I don't see why the pump shouldn't run. In theory if you put 12V on the dk blue lead to the vac pump with the fuse connector off she should run.
Good job finding those 2 parts. There are so many nooks and crannies on these motors that people have lost small animals and ratchets and.... and... Last edited by Franke; 11-15-2013 at 06:47 PM. |
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11-16-2013
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#8 |
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Join Date: Dec 2012
Location: NC
Posts: 1,783
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Re: TOP END REFINISHING
Pump is running on the bench.
 I manipulated the push-button that opens the internal switch. Besides that, no clue........... |
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11-15-2013
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#9 |
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Join Date: May 2013
Location: Beaver, PA
Posts: 515
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Re: TOP END REFINISHING
Look at page 8A-22-10 in electrical diagnosis supplement for a close up schematic of the vac pump ckt. It shows the whole ckt run.
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11-16-2013
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#10 | |
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Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,816
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Re: TOP END REFINISHING
Quote:
I guess it is possible to fix a vacuum pump Tom fixed his vacuum pump with WD40 I do not have any photos of a vacuum pump taken apart Used Ebay 91' vacuum pump The connectors on the vacuum pump apparently are different between a 90' and 91'-95' I guess you CAN change the connector Vacuum Pump Pigtail connector for 1990 application from Jerry
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Clickable links  On Iphone Touchable Links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 11-16-2013 at 02:20 AM. |
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