3000GT/Stealth International Message Center - View Single Post - Oil Cooler Bypass Valve- Cause of low oil pressure when car is warm?

Multiades · 06-20-2004, 12:11 AM

I did actually disassemble one of these valves a while back. IIRC it was just a spring-and-plunger arrangement. I was planning on examining the assembly in detail but I think it was either lost or thrown out a while ago.

If I can scrounge up another one I'll check it out.

While I think this is a *possible* contributor to failures, I don't think it is a likely one. The mechanism seemed pretty simple and fool-proof (if anything more foolproof than a coolant thermostat -- fewer parts). The best/only way to check its operation would be to install an oil temperature gauge and check it vs. the specified thermostat temp in the service manual (not sure about the exact spec).

Checking up on the oil cooler and oil temperature is probably a good idea on an engine that is generating SO MUCH HEAT -- the expected thermal side-effect of producing 500-600hp for some owners.

-Chris

06-20-2004, 12:11 AM	#10 (permalink)
Multiades vehicular thaumaturgist Join Date: Apr 2000 Location: Woburn, MA Drives: 1994 Stealth TT Trader Rating: (17)	Re: Oil Cooler Bypass Valve- Cause of low oil pressure when car is warm? I did actually disassemble one of these valves a while back. IIRC it was just a spring-and-plunger arrangement. I was planning on examining the assembly in detail but I think it was either lost or thrown out a while ago. If I can scrounge up another one I'll check it out. While I think this is a possible contributor to failures, I don't think it is a likely one. The mechanism seemed pretty simple and fool-proof (if anything more foolproof than a coolant thermostat -- fewer parts). The best/only way to check its operation would be to install an oil temperature gauge and check it vs. the specified thermostat temp in the service manual (not sure about the exact spec). Checking up on the oil cooler and oil temperature is probably a good idea on an engine that is generating SO MUCH HEAT -- the expected thermal side-effect of producing 500-600hp for some owners. -Chris __________________ The Pansy Patrol - a 3000GT/Stealth car blog with how-tos Pearl Yellow 1994 R/T TT w/84k - FOR SALE! new 4-Bolt factory short block, DR StgII heads, Titan TD05 headers, 14B turbos w/ ported 7cm^2 housings, 3" minimum-bend catless exhaust, SCE oil pan, RPSII clutch, Fidenza flywheel, OZ F1 Plus 17x9.5" wheels, Kumho Ecsta MX 245/45 tires, Drweldin DSM SMICs, 3SX engine mounts (Maximal solid front), GReddy 60mm P/H/W boost, Carbotech Panther Plus & Bobcat pads w/ slotted/drilled rotors, KSport GT-Pro coilovers, Maximal rear camber arms, SCE balljoints, ABS delete w/ cockpit-mounted Wilwood proportioning valve, AC delete, EGR/evap/dashpot delete, cruise/vacuum-tank delete, '95 Lexan headlights, McCulloch 4300K HIDs, GReddy Type-S BOV, solid shift bushings; Misc Parts: Walbro341, 20# fixed-back seats, Accelerated Moto catch can