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Engine guru's need your help

Started by _zenburger_ , Jun 27 2015 11:46 AM

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#1 _zenburger_

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Posted 27 June 2015 - 11:46 AM

Okay need some advice from the engine gurus here regarding my 355

So the issue is ive just blown out the seal on my oil filter for the second time, both times has happened on cold startups
Currently running standard oil pump and z160 filter
Penrite hpr40 25w-70

Engine was rebuilt just over 1000 kms ago, what would be possible cause and solution?

Im no mechanic so any help is greatly appreciated
Thanks in advance Blair

#2 TerrA LX

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Posted 27 June 2015 - 12:56 PM

Oil filter tight?
What brand filter?
What is your cold oil pressure?


#3 _zenburger_

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Posted 27 June 2015 - 01:13 PM

Ryco oil filter, definitely tight.
Cold pressure is around 60 psi

It has blown about an inch of the seal out of the filter both times

#4 _oldjohnno_

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Posted 27 June 2015 - 01:17 PM

Sounds like the filter bypass has been plugged. Open it up again if it has but either way get rid of that ridiculous Penrite oil and use something more reasonable.


#5 Ice

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Posted 27 June 2015 - 01:27 PM

Get some Shell helix oil to suit old school engines

#6 _zenburger_

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Posted 27 June 2015 - 01:31 PM

Okay will change oils, excuse my lack of knowledge but is the bypass the big nut on the bottom of the pump?

#7 _LS1 Taxi_

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Posted 27 June 2015 - 02:05 PM

60psi is far too high.
Sounds like something is restricted. Are you fitting the correct filter?

#8 _oldjohnno_

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Posted 27 June 2015 - 02:45 PM

Okay will change oils, excuse my lack of knowledge but is the bypass the big nut on the bottom of the pump?

 

It's a spring loaded valve built into the filter mount. A more appropriate oil will more than likely solve the problem.

 

I don't like Penrite, I don't like their stupid mis-labeled oils, I don't like their stupid +10 bullshit and I don't like their bone-headed tech data. I'm all for buying Australian but not when the company is severely retarded and spreads misinformation. frOck Penrite. Use an oil that flows like oil, not like a glacier...


#9 _STRAIGHTLINEMICK_

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Posted 27 June 2015 - 02:45 PM

What is the hot oil pressure on idle and at about 3000 rpm .


#10 _zenburger_

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Posted 27 June 2015 - 02:59 PM

At idle when hot will drop to around 20. Cruising at highway speed 2700-3000 will sit around 60

#11 _oldjohnno_

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Posted 27 June 2015 - 03:00 PM

Here's something to think about - would you put diff oil in your engine?

 

HPR40 has a viscosity at 40 deg of 272cSt (ideally it shouldn't be much over 100)

 

This is about twice as thick as 80w-90 gear oil and almost as thick as 85w-140 diff oil.

 

Penrite does have one advantage though - if you accidentally knock over the drum you have plenty of time to stand it back up before it spills...


#12 _zenburger_

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Posted 27 June 2015 - 03:03 PM

It's a spring loaded valve built into the filter mount. A more appropriate oil will more than likely solve the problem.

I don't like Penrite, I don't like their stupid mis-labeled oils, I don't like their stupid +10 bullshit and I don't like their bone-headed tech data. I'm all for buying Australian but not when the company is severely retarded and spreads misinformation. frOck Penrite. Use an oil that flows like oil, not like a glacier...


So i dont do any more harm than good when i pull it apart, if it is blocked off what should i be looking for?

I may just switch oils and monitor it for now

#13 _zenburger_

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Posted 27 June 2015 - 03:06 PM

Thanks for that info Oldjohnno, it was what the mechanic put in it after the rebuild and ive just stuck with it.

What would you reccomend?

#14 _oldjohnno_

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Posted 27 June 2015 - 03:24 PM

I usually use Caltex Delo 400 15w40 (the plain stuff, not the LE) but any of the hundreds of 15w40s with a bit of zinc will be fine.


#15 UCgazman

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Posted 27 June 2015 - 03:35 PM

Penrite does have one advantage though - if you accidentally knock over the drum you have plenty of time to stand it back up before it spills...

 

Hahaha


#16 EunUCh

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Posted 27 June 2015 - 03:54 PM

I think the oil filter bypass is the little valve in the recessed cavity , the big head bolt holds the pressure regulator valve/spring in place ?

Attached File  v8op.JPG   248.52K   4 downloads

 


#17 _zenburger_

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Posted 27 June 2015 - 04:03 PM

Thanks everyone for the help, i will try some thinner oil tomorow and see if that does the trick.

#18 _Mint_

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Posted 27 June 2015 - 04:43 PM

I have a std pump with the bypass blocked and use Penrite HPR30(20w60) without any issues HPR40 is a little too thick for my liking they also do a 15w60 which means its a little thinner on cold start up (first number) but still keeps running temp viscosity(second number)

#19 _zenburger_

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Posted 27 June 2015 - 04:51 PM

I have a std pump with the bypass blocked and use Penrite HPR30(20w60) without any issues HPR40 is a little too thick for my liking they also do a 15w60 which means its a little thinner on cold start up (first number) but still keeps running temp viscosity(second number)


Thats good to know, i was running hpr30 prior to the rebuild and never had this problem, I do remember thinking that hpr40 seemed a little on the thick side but never thought to question it at the time.
All part of the learning process i guess, hopefully some thinner oil will resolve the issue.

Cheers Blair

#20 _oldjohnno_

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Posted 27 June 2015 - 05:06 PM

I have a std pump with the bypass blocked and use Penrite HPR30(20w60) without any issues HPR40 is a little too thick for my liking they also do a 15w60 which means its a little thinner on cold start up (first number) but still keeps running temp viscosity(second number)

 

Penrites first number and second number represent something different to that of the rest of the world. Even HPR30 is absurdly thick.


#21 _STRAIGHTLINEMICK_

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Posted 27 June 2015 - 05:53 PM

At idle when hot will drop to around 20. Cruising at highway speed 2700-3000 will sit around 60

 

Yep , change oil before you do anything else , to a 15/40 or 20/50 mineral oil .


#22 TerrA LX

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Posted 29 June 2015 - 08:41 AM

If it blows in the same spot every time then inspect the pump face for defects.
Failing that, run thinner oil, cold pressure at idle is way too high OR don't rev your cold engine.

 


#23 mick_in_oz

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Posted 29 June 2015 - 07:59 PM

Is the Z160 the small V6 and later V8 filter? If no one as already said it, GET RID OF IT and run a Z30 or PF10 (if you can still buy them) and what nearly everyone else has said, put a sensible oil in it.


#24 EunUCh

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Posted 29 June 2015 - 08:48 PM

^ you can still buy a Z30/PF10 that were originally fitted to most of these engines :)


#25 _zenburger_

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Posted 29 June 2015 - 08:57 PM

Have switched to shell 15/40. cold idle is still high at 57psi, and thats with no revving, still getting 60psi at 2700-3000rpm. warm idle it sits around 25.

ive got a Z30 in the shed i will throw that on tomorow and report back.

thanks everyone for your input, cheers Blair
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