Bad hpop???
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Bad hpop???
So I had hard start issues. Then no start. The hpop is empty. I filled it and tried to start, still nothing. I even tried leaving the plug out and cranking to see if it'd blow out oil, nothing. So is my hpop bad??.
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See the pan level is the first thing I check, I didn't over fill it but I can add some more. But shouldn't filling up the hpop itself give me something? I'd think with it being filled up when I crank the motor oil should blow out the check hole shouldn't it?
Laughing Gas
Joined: Nov 2013
Posts: 868
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From: SoCal
If the HPOP reservoir was empty, it probably pumped air into the HPO rails, so it's gonna take some cranking to build pressure. The HPOP takes the oil from the reservoir and sends it to the injectors. It's the LPOP that takes the oil from the pan to the HPOP reservoir. The only reasons for an empty HPOP reservoir are either a leaking check ball allowing the oil to drain back down to the pan, or a problem in the LP oil system not sending the oil up to the HPOP.
Your first mission is to get oil pressure to the HPOP reservoir. To do that, you'll need to overfill the pan and jack the rear end up. Doing this submerges the pickup tube where they're known to leak. If that doesn't work, then your LPOP is probably bad. Here's a video I made while checking my last no start issue:
Your first mission is to get oil pressure to the HPOP reservoir. To do that, you'll need to overfill the pan and jack the rear end up. Doing this submerges the pickup tube where they're known to leak. If that doesn't work, then your LPOP is probably bad. Here's a video I made while checking my last no start issue:
Post Fiend
Joined: Mar 2007
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From: Texas
If no oil comes out when you remove the plug from the HPOP reservoir, then the motor is not pumping oil to the HPOP. Either a bad LPOP (rare it doesn't pump anything), or a cracked pick up tube not able to pull oil out of the pan, or not enough oil in the pan to pump.
A bad HPOP will still pump oil, just not at the required volume. It will also allow oil to make a complete mess of things if the plug in the reservoir is removed.
A bad HPOP will still pump oil, just not at the required volume. It will also allow oil to make a complete mess of things if the plug in the reservoir is removed.
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Alright I'm going to try the over filling and lifting the rear end and see where that gets me. Another thing though. I was having a decent amount of white smoke. And some oil in the exhaust, does that automatically mean bad rings? Might be a stupid question but I'm not a diesel mechanic, I know with a gas motor I'd be rebuilding it.
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Post Fiend
Joined: Mar 2007
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From: Texas
White smoke just means something's burning. Could be fuel from poor combustion or oil leaking into the turbo. Usually not an indicator for a rebuild if it just started happening.
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Its been doing it for awhile. I rebuilt the turbo but I guess it's possible I didn't get everything sealed right or is there somewhere else I didn't know about that oil can leak into it. It'll shoot a good amount of oil by it. I have a good stack and it'll have a decent amount in it.
Lead Driver
Joined: Apr 2016
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From: Bahstun
Alright I'm going to try the over filling and lifting the rear end and see where that gets me. Another thing though. I was having a decent amount of white smoke. And some oil in the exhaust, does that automatically mean bad rings? Might be a stupid question but I'm not a diesel mechanic, I know with a gas motor I'd be rebuilding it.
oil in exhaust pipe can be from the fuel unburnt or turbo seal leak
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