low oil pressure

Submitted: Thursday, Jan 08, 2004 at 14:05
ThreadID: 9589 Views:1473 Replies:6 FollowUps:0
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Hello there
Im looking for a good diesel mechanic around Brisbaine (just moved here)
Having problem with low oil pressure in the 100series (2001-1hz-denco turbo)
The problem seems to occur on the highway at 90-100kph when pressure drops to
about a quarter
Just clocked up 100kms around OZ with van ,no probs

The local mechanics want to rip the crank out and start grinding. Im looking for some confirmation that this is the way to go

Hope someone can help

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Reply By: glenno - Thursday, Jan 08, 2004 at 14:56

Thursday, Jan 08, 2004 at 14:56
hello , my father has owned a 60 series turbo diesel and the gauge is always on the minimum mark or just below . i dont mean the very bottom mark . anyway its done over 400000kms and hes never had a problem . relax .
AnswerID: 42239

Reply By: Member - Andrew (Bris) - Thursday, Jan 08, 2004 at 15:00

Thursday, Jan 08, 2004 at 15:00
Try Paul Geary Automotive on Kingston Road at Slacks Creek.
Phone 38083455.
He'll set you straight and won't rip you off.
AnswerID: 42241

Reply By: Member - Mal (Brisbane) - Thursday, Jan 08, 2004 at 16:07

Thursday, Jan 08, 2004 at 16:07
I can recommend Paul Geary as well.

Mal T.
AnswerID: 42248

Reply By: Member - DOZER- Thursday, Jan 08, 2004 at 16:36

Thursday, Jan 08, 2004 at 16:36
You need to do some checking first...with a mechanical gauge. These motors support a turbo well,having said that, have heard of cranks cracking on turbo 1hz's could also be oil filter, oil grade or turbo that is the culprit. Start with these checks first.
wheredayathinkwer mike?
AnswerID: 42251

Reply By: Member - Ken - Thursday, Jan 08, 2004 at 22:40

Thursday, Jan 08, 2004 at 22:40

Mate! I know for a fact that there is a big difference in the 'valving' in genuine and non genuine oil filters for a 1HZ.

If you are not using genuine Toyota oil filters, then strap on a genuine one and see what the presure guage does.

If no difference then take it off to the recommended mechanics for a diagnosis.

It is the cheapest and easiest diagnostic check you can run yourself.


Ken Robinson
AnswerID: 42285

Reply By: Trent - Friday, Jan 09, 2004 at 14:53

Friday, Jan 09, 2004 at 14:53

I've spent the last 8yrs working with Caterpillar, on both Earth moving and On-highway truck engines. I agree with most of the replies, RELAX. We did a lot of work on Kenworth's and can only say "NEVER EVER rely on the guage in the dash for accurate diagnoses!! or completey trust the sensors" Not sure if your vehicle has an oil pressure guage or not, in the trucks, it just gives the driver something to look at!!
Get your guys to connect a guage to the oil system and measure it, then compare this to the manufacturers spec. You may find you just have a dodgy oil pressure sensor.

AnswerID: 42362

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