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04-22-2012
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#1 |
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Join Date: Apr 2012
Location: Santa Fe, Texas
Posts: 18
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Oil Leak
I have been chasing an oil leak on my 58,000 mile 90 that has gradually been getting worse. The oil pan is dry everywhere except at the front of the engine. Yesterday I removed the two chassis braces and took out both front corner pan bolts (one of which was not very tight) and put sealant on them before putting them back in. I also tightend the three smaller front bolts.
My efforts were rewaded by the leak now being worse than it was before. Is there anything else at the front of the engine I need to be looking for? If I need to replace the pan gasket, how do you get to the 3 front bolts? Thanks. |
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04-22-2012
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#2 |
 Join Date: Jun 2007
Location: lasalle michigan
Posts: 61
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Re: Oil Leak
this cover on my bolts were loose. it's a pain to get your arm down to it but it fixed my leak.
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04-22-2012
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#3 |
 
Join Date: Jan 2009
Location: Portland Oregon metro area (Washington side)
Posts: 3,207
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Re: Oil Leak
Check the path from the pressure sensor down the corner of the engine.
More importantly having a very clean engine to begin with will help with isolation. When my oil pressure gauge leaked it was very frustrating until I very carefully cleaned the engine with a pressure washer. (read, no water getting under the plenum) I stuffed plastic bags in the openings around the plenum.
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Scott  Vett owner since 1979._It's about the car and the people |
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04-22-2012
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#4 |
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Oil Leak
header stud...and back of ZF also leaks....header stud very common and can run down the sides of the motor....cam covers also
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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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04-22-2012
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#5 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,828
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Re: Oil Leak
Let's not forget the famous oil pressure switch on the underside of the filter housing. That one loves to leak.
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2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold) |
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04-22-2012
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#6 | |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Oil Leak
Quote:
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director  91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V |
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04-22-2012
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#7 |
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Join Date: Apr 2012
Location: Santa Fe, Texas
Posts: 18
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Re: Oil Leak
Thanks for all of the replies. At this point I am thinking it is the oil presssure switch. I can almost see it and it looks like it has been leaking for awhile.
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