Site Search
Print Page Setup Profile Login
Section Image

Which oil ???

Submitted: Monday, Jul 02, 2007 at 22:18

TrishP

Hi guys
Can any of you help me. I have a Rodeo 2.8L Turbo and recently had the engine rebuilt. new bore, new rings, valve guides done etc. It's done abt 20,000 ks since the rebuild and I am getting excessive pressure in the crank case resulting in oil being blown out the breather tube. As far as I am aware the rings were put in correctly. Has anyone else had this problem, could it be the oil I am using i.e. Vanellus Global which it has had since rebuild. Your comments would be greatly appreciated. Ta
ThreadID: 47335 Replies: 5
Views: 510 FollowUps: 6
This Thread has been Archived
Thread Summary
Thread Watch Back To Forum Alert Moderator FAQ
AnswerID: 250415   Submitted: Monday, Jul 02, 2007 at 23:23

mike w (WA) replied:

TrishP,

any 10w 40 or 15w 40 Diesel engine oil will be fine. I noticed that Vanellus Global is a 10w 40, which shouldnt make to much difference, just not as good in colder temperatures on start up. Otherwise, I could not see it as cause to be blown out of the breather tube.

First thing to check may be the oil level. Check it isnt overfull, as the excess oil would have to go somewhere, and a breather tube sounds like a likely candidate. I know that the manual says to fit 6.5L, but ive never fitted that much in. There always seems to a bit of residual left in the engine.

Otherwise, Im out of ideas. Good luck

Mike
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."
Albert Einstein
Reply 1 of 5
FollowupID: 511658   Submitted: Tuesday, Jul 03, 2007 at 14:01

TrishP posted:

Thanks Mike, the car was not overfilled. I believe someone said someone (don't know who) that synthetic oil does not allow rings to seal properly on new sleeves and I am wondering if anyone has heard anything like this. Had new pistons, sleeves, rings etc. when engine was rebuilt. Haven't got original manual so don't know what they originally recommended. Had it all done up for desert crossing in August - now using a bottle to catch excess oil through the breather tube. Don't really want to go to the trouble of pulling it all apart to check the rings again as the mechanic was very thorough putting it back together for me. Runs well, just this blow by problem.

Puzzled - Trish
FollowUp 1 of 1
AnswerID: 250425   Submitted: Tuesday, Jul 03, 2007 at 07:42

Member - Bucky (VIC) replied:

First thing I would do is get it compression tested

I'm no expert but from what I have been told is that if oil is being blown back out anywhere, then you have a problem.
If you have a positive crackcase ventilation system, ( not too sure ) then check it to make sure the valve is not stuck.
Are you using the recomended class and viscosity oil ? as per the drivers manual !
Apart from that I cannot offer any advice, except to take it back to the people where you had it done, and if you did it yourself then you may have got something wrong somewhere.

By chance was the original pistons used, and maybe one has a hole in it.

Did you check the ring gaps ?
I'm not too sure what they are supposed to be, but just a little over could be detremental

Did you get just one of the rings in the wrong spot ?
Or did one ring crack during installation ?

Were the rings correctly rotated, ? ie one piston may have ring gaps down 1 side, there is a correct position for them.
I wish you luck and please let me know the prognosis !

Cheers
Bucky
I must obey !
Click Image to Enlarge
I must obey,, I must obey,, I must obey !
Reply 2 of 5
FollowupID: 511661   Submitted: Tuesday, Jul 03, 2007 at 14:13

TrishP posted:

Don't have a valve in this motor. Can't find driver's manual. Had the whole engine properly done up, valve springs, guides, with new cylinder liners (Chrome), new pistons, new rings, timing has been checked, fuel injection pump, the works. When it came to fitting the rings, these were carefully checked to ensure right way up and correctly rotated - i.e. no gaps right underneath oneanother. (done by a mechanic).
She now runs like a dream but I just have this problem of blowby with the oil. Someone somewhere mentioned that synthetic oil does not allow rings to seal properly against chrome sleeves and I was wondering or at least now hoping this is my problem. Have you heard about this.

Cheers Trish
FollowUp 1 of 2
FollowupID: 511787   Submitted: Wednesday, Jul 04, 2007 at 05:39

Member - Bucky (VIC) posted:

Actually now that you mention the synthetic oil thing, I recon that might be your best bet,,,, the rings have to wear ( bed ) in .

Good luck
Cheers
Bucky
I must obey !
Click Image to Enlarge
I must obey,, I must obey,, I must obey !
FollowUp 2 of 2
AnswerID: 250463   Submitted: Tuesday, Jul 03, 2007 at 10:55

brushmarx replied:

There is quite a bit of info on all things Rodeo (Isuzu) on www.clubisuzu.com
You could do worse than tour through thier website.
Cheers
Ian
Looking up a windmills skirt
Click Image to Enlarge
I wish I could get lost more often. At least it would mean I've gone somewhere different.
Reply 3 of 5
FollowupID: 511662   Submitted: Tuesday, Jul 03, 2007 at 14:17

TrishP posted:

Hi Ian

Thanks for telling me about this site - will certainly check it out.

Regards Trish
FollowUp 1 of 1
AnswerID: 250670   Submitted: Wednesday, Jul 04, 2007 at 09:40

Chris & Debbie replied:

Although I prefer not to use a synthetic oil for the run in period and only use a cheap oil it should not matter as a lot of car manufactures use it from the factory, but in saying that if you baby'd the engine or let it idle too much the bore could have glazed. There are products available for deglazing if this is the problem.
You say you have cylinder liners with chrome bores are you sure that the rings were not chrome plated as well? chrome rings can never be fitted to a chrome bore.
Chris
Reply 4 of 5
FollowupID: 511822   Submitted: Wednesday, Jul 04, 2007 at 10:41

TrishP posted:

Hi Chris, Thanks for your remarks. The engine reconditioners fitted chrome sleeves in the bores and they supplied the new rings, pistons etc. so one would think they were compatible. As stated, I have been using Vanellus oil and I am not sure if this is synthetic or not. I need to know which oil I can get that is real oil, not synthetic to try and see if rings will bed in properly - hopefully the problem. You mention products available for deglazing, can you name any? This engine is not baby'd, headed off to Fraser Island during the first thousand ks of it being reconditioned.

Trish
FollowUp 1 of 2
FollowupID: 511833   Submitted: Wednesday, Jul 04, 2007 at 12:00

Chris & Debbie posted:

Trish
There is a de-glazing product made by CEM (Cost Effective Maintenance), I know nothing about it only what i have read on this forum and on their web site, may be worth giving them a call, Caterpillar also make/made a fuel additive for deglazing.
I doubt glazing would be your problem though I would say it is more to do with an assembly problem such as a broken compression ring. The best thing to do would be to get onto the reconditioners and get them to troubleshoot the problem.
Chris
FollowUp 2 of 2
Activities Index
Adventure Flight Adventure Flight
Melbourne - VIC
Do you have what it takes to fly a real aeroplane?
Light Aircraft Training Flight Light Aircraft Training Flight
Adelaide - SA
Ever wanted to take the controls of an aeroplane and fly it yourself?
Moreton Island 2 Day Camping Tour Moreton Island 2 Day Camping Tour
Brisbane - QLD
Two awesome days of discovering all of Moreton Islands, hidden wonders, beauty and activities.
1 Day Cooktown 4WD Drive-Fly 1 Day Cooktown 4WD Drive-Fly
Cairns and Tropical North QLD - QLD
Travel by 4WD to the historic township of Cooktown.
Book Now - Things To Do
AnswerID: 251084   Submitted: Friday, Jul 06, 2007 at 16:53

G.T. replied:

You mention that your cyl liners are chrome. Is this the overall type of metal of the liner or does the liner have a chrome bore? If the latter ,did the pistons come with chrome plated rings especially the top rings? If so you have a problem as chrome rings cannot be run in a chrome bore. Hopefully this is not the case in your instance, but chrome rings will not bed in a chrome bore. Just a thought . Regards G.T.
Reply 5 of 5

 Page Sponsors

WAECO Pacific Pty Ltd WAECO Pacific Pty Ltd Premium Listing
Portable refrigeration provider WAECO, is celebrating 10 years in Australia in 2009. Established in high-technology headquarters in Germany 35 years ago, WAECO has developed a wide range of mobile technology for people on the move.
1 JOHN DUNCAN COURT   VARSITY LAKES, QLD, 4227
Phone: 1800 21 21 21
More info | Website | Driving Directions
ExplorOz ExplorOz
Become a Member of ExplorOz; buy or sell in Trader; buy Maps, Books, DVDs, camping accessories, and ExplorOz wheel covers, shirts, hats and stubby holders from the ExplorOz Shop; and book Activities &Tours or buy someone a gift certificate from our Activities section. Become an ExplorOz Member for just $60 in your first year, and $40 when you renew.
PO BOX 967  HILLARYS, WA, 6923
Phone: (08) 9403 3737
More info | Website