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Isuzu Trooper: Engine Oil Leaks

10 messages,  Last post on Jan 25, 2009 at 12:33 PM

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#1 of 10 Engine Oil Leaks by lebsica Dec 20, 2006 (9:44 am)
Hi, My husband and I have a 1995 Trooper with two leaks; one in the valve cover gasket and one in the seal. I got an estimate to repair these for around $300. My husband is leary because he thinks that once we replace engine parts the car may be damaged or other things may go wrong. Aside from the fact that I mentioned to mechanic that we didn't want to spend alot of money, since our neighbor has agreed to buy it as long as we repair the oil leaks. Does anyone have any knowledge of whether it's okay to replace these parts? Replies to this message: atfdmike (Dec 21, 2006 8:35 am)
#2 of 10 Re: Engine Oil Leaks [lebsica] by atfdmike Dec 21, 2006 (8:35 am)
Replying to: lebsica (Dec 20, 2006 9:44 am) Hi, I have not done it myself, but changing the valve cover gaskets is a pretty big job. Factory allows almost 5 hours for an experienced mechanic to do it. Depending on how bad the leak, I am not sure I would mess with it....if the accumulation and appearance are over a long period of time it may well be that you won't want to mess with it. I include the factory price for the parts below. I am not sure which oil seal you are referring to, but if your spark plug tubes are dry, the information below may be disregarded. There was a period of time that the camshaft seal was known to leak, but it is hidded behind the timing cover, so I am not sure if that is the seal you refer to. Changing seals can also be a little tricky, so experience can really help. I include the manual directions for removing the LH and RH, in that order, valve covers. Hope this helps, good luck.   SERVICE INFORMATION   Some affected vehicles may experience oil accumulation in the spark plug tubes due to oil seepage at the spark plug tube-to-cylinder head interface.   To seal off the seepage, replace the original spark plug wire set with a new, improved spark plug wire set (see Parts Information section) using the procedure described in this Service Bulletin. The new spark plug wire set has an improved bushing design that controls oil seepage at the spark plug tube-to-cylinder interface.   SERVICE PROCEDURE   When servicing affected vehicles experiencing oil accumulation in the spark plug tubes due to oil seepage at the spark plug tube-to-cylinder head interface, be sure to refer only to Service Bulletin SB96-01-L005, issued 9/96.   The authorized repair for affected vehicles experiencing this condition, is to replace the original spark plug wire set with a new type wire set which features an improved bushing designed to control oil seepage at the spark plug tube-to-cylinder head interface. SB96-01-L005 describes this authorized repair.   1995 Isuzu Truck Trooper (4 Door) V6-3165cc 3.2L SOHC (6VD1)  Vehicle Level Technical Service Bulletins All Technical Service Bulletins Cylinder Head Cover - Installation Precautions       Cylinder Head Cover - Installation Precautions       BULLETIN NUMBER SB94-01-003   ISSUE DATE DECEMBER 1994   GROUP ENGINE   TROOPER (UX) AND RODEO (UC) CYLINDER HEAD COVER DAMAGE   AFFECTED VEHICLES   Trooper (UX) and Rodeo (UC) models equipped with 6VDl engine.   SERVICE INFORMATION   When installing cylinder head covers on affected vehicles, care must be taken to ensure that the head cover bolts are properly tightened. Use only a good quality torque wrench and tighten only to the specifications listed in the appropriate Workshop Manual. Do not use air impact wrenches to tighten cylinder head cover bolts. Air wrenches tighten the bolt until the corner tab on the cylinder head cover either cracks or breaks (Figure 1). Once the tab is damaged, an oil leak will result. This damage can be incorrectly diagnosed as a leaking head gasket or a rear main oil seal. Cracked or broken cylinder head covers due to over tightening are not covered under warranty.       1995 Isuzu Truck Trooper (4 Door) V6-3165cc 3.2L SOHC (6VD1)  Vehicle Level Engine, Cooling and Exhaust Engine Valve Cover Gasket Parts Information       Parts Information    Part OEM Part Price 4 - Valve Cover Gasket 8971395690 $38.05        REMOVAL   Preparation: Remove battery ground cable   Ignition wire Disconnect from spark plug side. Positive Crankcase Ventilation hose Disconnect from common chamber. Disconnect vacuum hose from throttle body. Engine harness bracket Remove fixing bolts on cylinder head cover. Exhaust Gas Recirculation (EGR) pipe Remove fixing bolts on cylinder head cover. Remove two fixing bolts on exhaust manifold. Remove two valve fixing bolts on common chamber. Cylinder head cover Remove 11 fixing bolts then the cylinder head cover. INSTALLATION   Fig. 6A1-3                Cylinder head cover Clean the sealing surface of cylinder head and cylinder head cover to remove oil and sealing materials completely. Apply sealant (TB-1207b or equivalent) of bead diameter 2- 3 mm at four places of arched area of cam- shaft brackets on front and rear sides.    Tighten cylinder head cover bolts to the specified torque above.     Tighten valve fixing bolts to the specified torque above.        Exhaust Gas Recirculation (EGR) pipe. Tighten each fixing bolt to the specified torque above. Engine harness bracket Positive Crankcase Ventilation hose and vacuum hose Ignition wire    RH Side REMOVAL   Preparation: Remove battery ground Gable   Common chamber See: Intake Manifold\Service and Repair Ventilation hose Disconnect from cylinder head cover. Fuel hose Disconnect feed and return hoses from fuel pipes. Remove two fuel hose fixing bolts on the cylinder head cover. Engine hanger Remove heat protector on exhaust manifold. Remove bolts and nuts that secure the hanger to the exhaust manifold and cylinder head. Heater pipe Remove heater pipe fixing bolts from the bracket. Cylinder head cover Remove 11 fixing bolts, then the cylinder head cover. INSTALLATION                  Cylinder head cover Clean the sealing surface of cylinder head and cylinder head cover to remove oil and sealing materials completely. Apply sealant (TB-12O7B or equivalent) of bead diameter 2- 3 mm to four places of arched area of camshaft brackets on front and rear sides. Tighten Cylinder head cover bolts to torque of N.m (lb.in) 8 (69) Heater pipe Bolt Torque Tighten bolts and nuts to the specified torque above. Fuel hose Ventilation hose Common chamber
#3 of 10 oil leak by rrandy Feb 13, 2007 (8:59 am)
i own a 1990 trooper, 2.8 v-6, there is oil leaking from the top,rear,slightly to the passenger side of the engine. you can see clean oil running down the side of the bell housing. what is back there, oil sending unit? i cant see, it does not appear to be the distributor shaft, i can see it. help. Replies to this message: atfdmike (Feb 16, 2007 7:01 am)
#4 of 10 Re: oil leak [rrandy] by atfdmike Feb 16, 2007 (7:01 am)
Replying to: rrandy (Feb 13, 2007 8:59 am) Link to Engine Compartment Component Locations.    http://www.carspace.com/atfdmike/Albums/trooper/90%20isuzu.gif/page/photo.html#p- ic   You may just have a rocker cover gasket leak. If you have adjusted the timing by rotating the distributor, the gasket there may be bad(cracked,leaking) Pretty common problems. good luck
#5 of 10 oil cooler hose? by trooperman1 Nov 10, 2008 (5:06 pm)
i have an awful leak from what i believe to be an oil cooler hose. it is very difficult to see this hose at the block. i've read that this is a very difficult part to find. honestly, how necessary is the cooling? it seems very possible to remedy this with fittings etc... 2.8 v6 1990 Replies to this message: atfdmike (Nov 11, 2008 4:50 am)
#6 of 10 Re: oil cooler hose? [trooperman1] by atfdmike Nov 11, 2008 (4:50 am)
Replying to: trooperman1 (Nov 10, 2008 5:06 pm) If you have a remote filter that is not mounted on the adapter on your 2.8 you won't be able to reroute the lines. If you are sure it is just the cooler, then I suppose you could "reroute" , but oil life could be affected. The GM adapter, while difficult to get to the bolt that holds the manifold to the adapter, is pretty simple, with a couple of O rings and a flat gasket (If I recall correctly). Worst part is the long extension needed to reach the bolt from the front. HTH One guys opinion.
#7 of 10 oil cooler & hoses bad by cmartman46 Nov 16, 2008 (5:41 pm)
I have a 1990 Trooper 2 4 door V6 4x4..My oil cooler developed a couple of cracks with leaks.I would like to remove and plug off the oil lines at the engine,Does any body have any info on what fittings I would need to plug off this system?.
#8 of 10 1991 Isuzu Trooper 2.8 by bsw1 Jan 25, 2009 (9:26 am)
Hello everyone   I have a oil leak that is on the drivers side of the engine near the front..I cannot find its location of the leak It is Not valvecover, not oil pan.not oil filter .it begins to drip once the car is started for a few moments..i have read it could be the oil cooler hoses? where are they located? it is hard to determine the location. Is their a diagram of the cooler hoses? any other possibilities?any suggestions would be helpful Thanks everyone Roelof Replies to this message: bsw1 (Jan 25, 2009 11:13 am) cmartman46 (Jan 25, 2009 12:33 pm)
#9 of 10 Re: 1991 Isuzu Trooper 2.8 [bsw1] by bsw1 Jan 25, 2009 (11:13 am)
Replying to: bsw1 (Jan 25, 2009 9:26 am) one more thing..it is NOT Tranny oil..it is regular engine oil Thanks Replies to this message: cmartman46 (Jan 25, 2009 12:33 pm)
#10 of 10 Re: 1991 Isuzu Trooper 2.8 [bsw1] by cmartman46 Jan 25, 2009 (12:33 pm)
Replying to: bsw1 (Jan 25, 2009 11:13 am) I am sure an oil cooler does offer some extended engine life to some point if exposed to brutal enviroments, but it can also leave you stranded with no means of a quick fix. I once had a hose chaff on metal and busted draining almost all the engine oil. I just happened to notice smoke which was burning on the exhaust to stop in time. The two hoses run from the side of an adapted oil filter housing connected to aluminum fittings which are routed through the oil cooler in the grill to the drivers side. It is very hard to get to the connections at the oil filter housing with limited view. Remove the left front tire,unbolt and move power streeing pump out of the way to gain access. Use a good drop light to see your work. I removed my hoses and brought them to Napa Auto store to repair them. $34.00 a piece to fix. Hope this helps! Good luck!

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