03 start problem

[98rue]

Starts fine cold. But after it warms up and u shut it off will not start until it cools down. Dont know a whole lot about 6.0 diesels

[WEWILLE]

Sounds like a high pressure oil leak, what kind of scanner do you have?

[98rue]

Scanner? Dont quite no what u mean . Engine scanner?

[WEWILLE]

Yep something were you can data stream and read pids and codes.

[98rue]

no nothing like that. how would I check for the high pressure oil leak ?

[WEWILLE]

Theres really not much you can do without one. These 6.0l are very complex motors. Does it crank normal speed when it doesnt start? Does the oil pressure gauge on the dash come up?

[98rue]

yeah it cranks at normal speed. And the oil pressure gauge comes up to where it normally does when its running.

[WEWILLE]

Remove the fuel filter cap and have somebody turn the key on it should fill the bowl, i highly doubt its a fuel problem, because it only acts up when cold. Also you can double check low pressure oil by taking oil filter cap off and have somebody crank the engine it will should fill the bowl as well. Other than this stuff theres nothing you can do without the proper tools. This will just cover some of the basics.

[98rue]

K thanx for the suggestions will give try after work tomorrow. Just cant quite understand start excellent when its cold runs great when its running but u shut the dang thing off when its warmed up u better have a good pair of shoes. Because its not going to start for 30 minutes or so . LOL

[m-chan68]

You say this is a 2003 model year, correct? You say it starts normally when the engine is cold, but fails to start when the engine is up to operating temperature, correct? What is the mileage on the vehicle in question? I would be inclined to agree it sounds like a high pressure system oil leak as well. Unfortunately this particular model year 6.0L is a ROYAL pain the a$$ to carry out a high pressure oil system air test on, due to the location of the ICP sensor. First and foremost, would be be to have it checked for DTCs (Diagnostic Trouble Codes) if any, as already mentioned by WEWILLE.