|
|
Post by beetOls on Jul 24, 2005 20:16:30 GMT 11
is white smoke coming out of the oil filler and dipstick a pretty much sure shot way of telling that my engine is a blow-by? smoke is pretty visible but oil consumption is normal...anyways, ill have it compression tested this weekend and i think thatll give me all the answers...just asking for your thoughts for the mean time...  |
|
|
|
Post by Graham on Jul 24, 2005 21:29:40 GMT 11
Could it be water getting in there???
|
|
|
|
Post by beetOls on Jul 25, 2005 11:15:46 GMT 11
i don't think so...just had my oil changed today and there's no trace of water in it...
|
|
|
|
Post by geeves on Jul 25, 2005 16:55:59 GMT 11
How long has it been doing this and how much. It dont sound good but all engines do produce some blow by somtimes I trust you used a suitable oil . Compression and leak down test should tell all. Looking at your previos posts all does not sound well in the engine department.
|
|
|
|
Post by beetOls on Jul 25, 2005 17:13:51 GMT 11
hahaha! you're right geeves...dunno maybe this year is just not good for her eh? hehehe...the past years have not given me a single problem, my mitsu folks had theirs conked out at 99k, i think they're just coming in all at the same time...im still observing, can't wait for the weekend to end all this and find out the verdict! if the pistons are already tired and no good...im left with bidding my engine bye bye and say hello surplus/2nd hand (which is not that easy considering the risk involved? or find a trusty rebuilder and make her new again!=)
|
|
|
|
Post by beetOls on Jul 25, 2005 17:20:26 GMT 11
ow, by the way...i really could not tell how long it's been doing that but i first saw it when i had my injection pump serviced about 3 mos ago, they were trying to rev it repeatedly. its almost invisible at first look but staring at it longer, you would notice it. when i put my palm on top of it, i almost don't feel any pressure pushing up
|
|
|
|
Post by geeves on Jul 26, 2005 6:42:28 GMT 11
some fuming is normal but it is still a bad sign. You might as well run the engine till it becomes hard to start or oil use becomes exessive then buy a second hand one. Diesel recons aint cheap
|
|
|
|
Post by beetOls on Jul 26, 2005 11:19:04 GMT 11
whatdya know...the engine is running quite smoothly after the oil change...could be a bad oil that i was using before...yeah, i think i should just wait till it really gets tired and all...it still starts with just a click right now. i once saw someone from here selling his brand new 4jb1t at ebay...i wonder if it was sold already...hmm...guess ill start scouting for a replacement as early as now...
|
|
|
|
Post by geeves on Jul 26, 2005 14:37:25 GMT 11
I used to get some blowby once the oil got a little old ie 4000k but changed to a semi synthetic and now there is virtualy none. If blow by gets excessive you might be luck with just rings and bearings but you never know till you lift the head. Theroreticaly the crome linners should outlast several sets of rings but they can be eaten by short runs and high sulphur diesel which results in high amounts of sulphuric acid in the oil
|
|
Dave
Isuzu Senior
Posts: 169
|
Post by Dave on Jul 26, 2005 16:43:41 GMT 11
My 92 Bighorn did this from the day I purchased it (80km) through to when I sold it (150km), but never had any real concern with it. If I had kept it, I was going to put an oil catch can on, as the Isuzu motors are well known to be heavy breathers.
Dave
|
|
|
|
Post by beetOls on Jul 26, 2005 17:03:59 GMT 11
ill check for blowby again later...sometimes its better not to know...because its sometimes depressing! hahaha. if it improves then ill just go get the top overhaul kit and proceed with it...can't afford both right now.
|
|
|
|
Post by beetOls on Jul 26, 2005 17:10:18 GMT 11
@dave
wow...70k kms is a lot...im really lucky if mine will go as far...=)
|
|
Dave
Isuzu Senior
Posts: 169
|
Post by Dave on Jul 26, 2005 17:20:30 GMT 11
I got sick of getting depressed by the Bighorn, so I bought a Safari ;D
If the dipstick wasnt fully pushed in, oil would be blown out there, and the rear seal leaked due to the pressure in the sump.
Dave
|
|
|
|
Post by beetOls on Jul 26, 2005 20:02:54 GMT 11
the GQ's are the real macho's! ive always admired the safaris here...there wasn't any oil coming out of the dip stick....yet
|
|
|
|
Post by mudgrip4 on Jul 27, 2005 6:27:15 GMT 11
Geeves - can you tell me what this semi-synthetic oil is that you find good. Have found types of oil vary considerably in performance with the 4jb1T. For others - re problems experienced with breathing and pressuring of oil past seals etc - this is common to isuzus but simple to fix. Don't go selling your perfectly good diesel because of this. You won't find better amongst the Nissans or Toyotas though there are some good ones there too. You can fit a breather kit -about $225 club price and an hour to fit - (or perhaps a catch can system) and the problem is gone. There is a whole earlier post on this subject. This is the one issue with the 4jb1T but is quite easy to fix. - Mike
|
|
|
|
Post by geeves on Jul 27, 2005 7:56:43 GMT 11
Currently useing Caltex Dello400 I switched to this when the Warehouse had it cheap at 37 for 5 l
I have been told its a little good for an engine of this age but it works for me
|
|
|
|
Post by beetOls on Jul 27, 2005 9:13:49 GMT 11
i have used caltex delo gold before, i just forgot the rating...but my pickup smoked like barbecue thats why i switched to castrol (dealership oil) and now just switched to a new one again, shell rimula x 15w-40 rating and its starting to prove good for my 4jb1t! i think its still gonna go a long way despite my problems.haha...so is the said rating better compared to a 20w-40 for a pretty old engine? i also heard switching to a fully synthetic oil after using mineral for a long time is a no-no for the seals and stuff? i guess we all just have to know our engine and which engine oil it performs best eh...
|
|
|
|
Post by geeves on Jul 27, 2005 13:18:45 GMT 11
interesting The local diesel shop is an agent for caltex oil and it was them that told me that I should use delo gold in preferance to delo400 as its cheaper and more suited to the older engine. I can buy delo400 from the warehouse cheaper than I can buy delogold from them so its not hard to work out which way to go.
Ive heard the same about synthetic oils but dont know if its true. I started useing synthetics at 140000 and the rear main started leaking at 175000 but then my engine will be 16 in a couple of months so who knows.
|
|
|
|
Post by beetOls on Jul 27, 2005 14:19:08 GMT 11
mine's been sweating oil between the transmission and engine for quite a long time now and i don't think its getting worse...no drips on my drive way so far.
|
|
