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#21 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Prior owner took out everything....brakes disconnected, etc....lots to do
![]() any suggestions for flushing out the oil cooler????
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#22 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#23 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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this is why the original owner started pulling the motor....fear over cam failure:
http://zr1specialist.com/HAT%20Web/f...s/DCP_1123.JPG Although appears these were not having issues....
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#24 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#25 |
![]() Join Date: Apr 2007
Location: Northern VA
Posts: 2,655
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Lee,
I had good results with removing mine from the car then letting it set for couple hours filled with brake cleaner. Sloshed around good before draining then repeated. For final flush hooked it up to the solvent tank pump outlet with new solvent let it run until the return was clear. Then blew it out with the shop air hose. I was surprised at the amount of effort it took for just having 20k miles of use and frequent oil changes.
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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#26 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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thanks Phil.....
Forgot to mention also....heads have Titanium keepers.....
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#27 |
![]() Join Date: Aug 2005
Location: Pa
Posts: 115
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Lee, asking to have a understanding, did the cam fail or was it a lifter failure?
Thanks Bill |
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#28 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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This car did not have a failure...the cams and lifters look good. The prior owner took the motor apart as a preventative measure and did not have time to finish the car.
As far as what I have heard about the Jeal cams....some say the Rockwell is too low in comparison to the lifter. In speaking to Mr Jeal he contends those with failures had poor oil pressure. Others run these cams with no issues(Including Corey Henderson). Some have had failures. Either way..I am going the safe route and replacing them
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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#29 |
![]() Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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My leak down tester was not working, so no numbers...but did pressurize the cylinders to see what I had. 1,2,3,5,6,7,8 no leakage at the valve, can hear some hissing past the rings, but this motor has sat for years so probably some abnormally dry liners.....
Cylinder 4 had some leakage past both intake valves....however with some brake clean sprayed in it and some pressure on the valves....it improved.....so thinking they are just alittle gunked up. Will soak they overnight to see how they do...they are holding fluid. Once I get a new tester will post some #s....
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 06-29-2014 at 09:46 PM. |
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#30 |
![]() Join Date: Sep 2012
Location: Westminster, Md.
Posts: 436
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Hello Lee,
I have used this milkstone acid on all of my old Corvettes. Let part soak for a couple od days, and wipe or squirt it off.you can buy it at TSC or True Value. I buy 5 gal at at time, i think it cost about $50 Nelson007 ![]()
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WAZOO MEMBER 1993 #124 Ruby 1994 #??? Red/Black 1995 #061 Black/Red 2012 ZR1 Preproduction |
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