Oil leak possible causes 4jb1t isuzu mu

[morgan122]

Having yet some more problems with my mu. has very large oil leak from drivers side ( exhaust) have steam cleaned and taken for a drive appears to be something up top have replaced rocker cover gasket recently but oil seems to be collecting around the water inlet hoses for the oil cooler. I thought it could potentially be a leaky oil filter or a cracked oil cooler leaning towards oil cooler as all the oil is orientated around one side of it. is there any ideas guys? any common problems ? cheers

[jellis]

could be oil lines to and from your turbo

[morgan122]

check those there good

[mudslinger]

frost plug on the back of the block where cam shaft ends is above the oil cooler

[morgan122]

now thats not what i wanted to hear haha. how hard are they to get at mate? isit on the side of the engine or on the bell housing end

[geeves]

frost plug would be water but there may be similar smaller plugs on oil galleries. Look for the easy stuff first ie turbo lines,alternator vacuum pump lines. Anouther possibility is oil seeping out of the inlet pipes but if this was creating the amount you suggest it would have other issues

[morgan122]

turbo lines were spotless aswell as the alternator. im going to replace oil and filter tomorrow and go from there if its not that oil cooler is reasonably cheap so that will be the next idea after i have a really good steam clean and degrease again and have a really good look about

cheers for ure help guys really appreciate it

[mudslinger]

there is a frost plug/cap in the block that sits right behind the cam shaft wen i put my cam shaft in i must've pushed it in to hard and loosened the end cap, after we started it made a puddle so we rtv'd the cap in and it fixed the issue. its jus above the cooler

[morgan122]

on the back of the block just above the oil cooler. this sounds strange to me as my cooler is mounted on the side of the engine just behind the turbo down pipe. But none the less things must be getting lost in translation is the plug hard to remove and replace with the engine still in the vehicle? cheers

[turnturn]

Loose oil filter?
Damaged O-ring on oil filter

[mudslinger]

jus check it if it aint leakin its sweet. oil finds it way to the lowest point. somethin to eliminate .mine went everywhere

[geeves]

what brand of filter? Ryco are notorious on isuzu engines for coming loose. Dont know why but ryco are fine on everything else

[morgan122]

its a Fram but its been on and off a few times so hoping thats my problem aye. just about to go grab a new filter now. pray for me im over doing repairs want to spend some money on improvements

[geeves]

Genuine Isuzu or if you can find one Sakura are most recommended. Ive been using Valvolene for over a decade with no issues.

[morgan122]

have replaced the filter should have got genuine but just got another fram. started up oil is oozing off the back of the oil cooler on the block side cant really see ifits actually coming out of the oil cooler but can see it dripping off the bottom of the cooler with a mirror so assuming its that wish me luck cheers guys

[geeves]

just sent you a copy of the engine manual. There is a good picture of the oil cooler setup in there

[morgan122]

cheers mate your a legend ive pulled off the cooler not too sure if its the problem there is a significant dent init from where one of the bell housing bolts has vibrated loose and been rubbing against it how fragile are they mate

[geeves]

they are fairly thin tinware but Ive never heard of one leak. Never heard of damage from a bellhousing bolt either. More commonly they fail internaly mixing water and oil.

[morgan122]

hmm i hope it is ordered a replacement one but pressurised it with compressed air and couldnt see any leaks. also i pulled off rocker cover to check gasket of which ive recently replaced about a week or so ago it seems very flat already it was a cheapo from repco permiseal wondering if i should go genuine with that and eliminate that how severe can top end leaks get though asits not really pressurised