what is a good oil pressure?

[davig]

I was wondering what everyone else is getting on there oil pressure gauge? I didn't really pay attention before but think I have a serious problem. When my truck is at idle cold its at 60 and as it warms up it gets lower and lower until its in the red when am at idle at a light. And even a couple times I was driving for a hour or two and I would stop for a min. And my truck would give me a oil pressure low alarm. Has anybody else had a problem like this??

 

[btfarm]

If the engine still sounds and runs good I'd suspect the OPSender.

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[blkdmax04]

Check oil might have fuel in it

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[catman3126]

yep what he said good chance it has fuel dilution. if not throw a gauge on it and see what reading you get.

 

[davig]

It sounds ok still. How will I kno if there's fuel in the oil will it have a tint to it or smell like fuel?

 

[catman3126]

pull the dip stick and see if its way overfull. take a papertowel and wipe dow the stick and see if the towel start showing wet but no dark like oil way above the full mark. or drain the oil and see if its a lot more then 10 quarts. I have seen a full five gallon bucket come out of a duramax with bad injectors

 

[catman3126]

and yes it will smell like fuel also.

 

[davig]

It looks way full but can't tell if there's fuel when I wipe it with a rag

 

[03spoolindmax]

My oil pressure dropped when my injectors went bad. The oil reading was well past the full mark by about 2". I could smell diesel in the cab also.

 

[davig]

Damn... sounds like injectors then... so what does everyone usually do? You guys usually get bigger injectors or you just usually replace what you can? Is there any way of preventing it from happening again?

 

[03spoolindmax]

I got the dealer to goodwill them 2 years ago or else I was going bigger. Keep up on changing the fuel filter regularly or invest in a lift pump. Try and use a good additive to help lubricate the injectors also.

 

[davig]

Would you guys replace all 8 or just the ones needed.

 

[mreeves23]

Once your going in and if it's been a while since they were replaced, I would definitely replace with a full set of 8 injectors.

 

[catman3126]

replace all eight with new lines and all the seals and might as well do the cup seals for piece of mind. merchant sells a great with with everything you will need for the entire job for 2960 IIRC, + a 1200 dollar core which gets refunded. its the body of the injector and that cracks, filter and lift pump don't help this problem. now if you had a bad balance rate issue and smoking at idle it might but the cracking body is a weak design.

 

[davig]

I've had it for about 10000 miles and it has 160000 on it the last owner didn't kno if the injectors ever got done. Where's a good place to take it to get diagnosed for sure. I just don't want to get them replaced and spend all the money if its not it. Or should I jusy man up and do it. Should I get bigger injectors since am in there or no and stick with stock?

 

[MAXX IT OUT]

With you being a 03, you may consider a LLY head swap.

 

[davig]

Since their in there? Does the lly head design work with the 03 cali trucks?

 

[catman3126]

it should be really evident with a white paper towel down the dipstick if there clear liquid getting on the towel and not dark engine oil. or drain the oil and smell it and see if its got alot more then half a 5 gallon bucket in there. 10 quarts should be right at half a bucket full.

 

[MAXX IT OUT]

Does the lly head design work with the 03 cali trucks?

yes they do.

 

[davig]

You think it will be ok for me to drive it 10 mile round trip a day. till I can get it done it takes a wile till my oil pressure gets to 0. Or is it really bad period.