My take on DT466E HUEI poor / no start troubleshooting

Best Practices for My take on DT466E HUEI poor / no start troubleshooting

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Nice write-up Thanks for the info! Truck Shop

One thing about servicing HUEI injectors, when you pluck one out of the hole you dump fuel and motor oil on top of the piston, well, that is if you don't thoroughly drain the oil and fuel galleys in the head which is not always an easy thing to do. If you do dump fuel and oil on top of the piston, depending on how much went into the cylinder, if you don't get it out of there before you button everything up you take a chance on hydro-locking the piston when you crank it over and possibly bending a connecting rod. No worries, there's a simple solution to this problem, the Suck Bucket. A simple empty 5 gallon oil bucket with lid. Drill a hole in the lid opposite the pour spout and insert your choice of vinyl tubing in the drilled hole, 1/2" and 5/8" ID works best, 3/4" and bigger tends to collapse. Take your shop vac hose and place it on the pour spout on the lid, now you can suck up liquids into the bucket with the vinyl tubing and not fill your shop vac with oils. BTW, do not use this on volatile liquids like gasoline or solvents, your shop vac motor could ignite the vapors. You can use short pieces of smaller ID/OD tubing to get into smaller holes like an injector port. Drop the tube into the open injector hole and suck up the oil and diesel on top of the piston. In this particular case it was antifreeze. When pulling the injectors on a big Mitsubishi it pulled the injector cup out on #1 piston, filled the cylinder with antifreeze.

Good to bring that up, I use something similar which is just a plastic 2 gallon gas jug and run the small hose off the vent. Truck Shop

That is a really good and really simple plan, I however never clued into using a shop vac no matter how obvious it is now, :bangh , I had several containers collapse from trying to use the A/C vacuum pump, until I got a paint canister that is designed for pressure(and can easily stand vacuum) that can be pulled to a good volume. Now I will just smarten up and Thank willie59 every time I use a suck bucket

In case noone here saw the thread that Wille did on the suck bucket here is the link to it.Ron G http://www.heavyequipmentforums.com/showthread.php?20354-The-suck-bucket&highlight=suck+bucket

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I'm not familiar with the configuration of a DT466E, but in a former job I've pulled HUEI injectors on Navistar 7.3 and Ford Powerstroke engines. On those engines the heads have SAE hex plugs for drilling the oil passages in the heads for the injectors. One of the first things I'd do is remove those plugs and suck the oil out of the galley's before I pull the injectors thereby minimizing the amount of motor oil that gets dumped on the pistons.

If I remember correctly the high pressure oil rail pretty much self drains when the feed line is unhooked, As I recall there wasn't much liquid on top of the pistons when I vac ed them, Synflex air brake tubing also makes great vacuum hose if you need bigger sizes.

Longhood said: If I remember correctly the high pressure oil rail pretty much self drains when the feed line is unhooked, As I recall there wasn't much liquid on top of the pistons when I vac ed them, Synflex air brake tubing also makes great vacuum hose if you need bigger sizes. Click to expand... Which it would most likely do on a DT466E in-line six, but on the V engines, 7.3 and Powerstroke, the feed port is on the uphill side, oil stays in the oil galley in the head, those engines will dump some oil and fuel on top of the pistons.

A couple of you tube videos on the HUEI system, trouble shoot : https://www.youtube.com/watch?v=OQr5797brqA fix: https://www.youtube.com/watch?v=XBRRaKSH_dw tools :https://www.youtube.com/watch?v=OQr5797brqA

I have a DT466E huei system we just rebuilt the eng. and now we are trying to start it it wants to start but it wont I took the manifold off and replaced the orings going in the injectors but we have lots of oil leaking at the top of the injectors don't know if this is right or not.

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