Rotary Injection Pump Drips, Inline vs. Rotary Question (1 Viewer)

[shansen]

I noticed a drip last week on the area below the injection pump, fuel weeping from somewhere and pooling a bit in the area circled in the picture below. I did check all of the fuel lines going to/from the pump, and they are all dry.

Not finding much luck on a rebuild kit; or even a rebuilt pump. I did find a shop that said they can likely rebuild as long as parts are available, probably around $1300.

Does anyone know of a site that sells a rebuild kit, or do I just order everything from Partsouq that looks replaceable? Is there a vendor that sells rebuilt rotary injection pumps already? Alternatively, I can find rebuilt inline pumps, but I do not know if an inline pump can replace a rotary pump and if it could, is there an advantage to how one works compared to the other?

 

[roscoFJ73]

We dont know what sort of pump you have or what its on. Im guessing its a rotary pump on some kind of B engine. They only sell rebuilt exchange pumps when there is demand for them. But most likely yours would have to be rebuilt if it needs doing.
If you replaced every part that might need replacing you would be broke. Normally you find a vendor that sells the seal and gasket kit then buy any extras as needed.
There should be Denso and a Toyota part number or serial number on the side of the pump. Getting that is the first step.

You cant practically replace a rotary pump with an inline pump. The rotary pump models often have vacuum pump and p/s pumps built into the front where the pump sits.

 

[shansen]

Oops, not sure why I missed putting in all the info.

1990 BJ75, 3Bii engine, rotary pump. This label I found online matches the part numbers on my tag (though this is much more clear).

Thanks for clarifying a rotary can't be replaced with inline.

 

[GTSSportCoupe]

If you're an experienced DIY mechanic it is possible to remove, reseal and reinstall the pump yourself. It is very common for these imported diesels to have leaking IP's. I've resealed a couple myself now and it was not a big deal. Just have to keep everything very very clean. The seal on the pump head is the tricky one, and I can give you pointers if you decide to do it yourself. That said if cash is not a big deal for you, there are many shops that can do it for you too.

Cheers!

 

[roscoFJ73]

Denso dealers in the US maybe able to help you. These pumps are fundamentally the same as what VW use allowing for size, volume etc and anyone who can fix Bosch VW pumps can fix Denso pumps.

Australian injection shops charge about $500 to run a seal and gasket kit through the pump and at this point they can inspect internal parts for wear. So the $500 basically covers the labour and any extra parts are on top of that.
$1300 is a ambiguous figure.
Most of the pump internal metal parts are $30 to $250.

 

[roscoFJ73]

These are the 4 main wear points on a rotary pump, but its unlikely you will need to replace any and certsainly not all of them.

 

[shansen]

Took the easier (although more expensive) approach. When the shop opened the pump it was full of garbage, rust and other issues.

 

[roscoFJ73]

Took the easier (although more expensive) approach.

Well dont keep us in suspense !!

 

[shansen]

Didn't realize I left this on a cliffhanger

New pump works fine, no leaks now. Need to clean my fuel tank this weekend, as it's probably pretty dirty inside. When I purchased this truck several months ago, the fuel filter was really bad. Likely the lack of previous care led to the problems with the injection pump.

 

[Arite82]

How much was the damage to your wallet

 

[shansen]

How much was the damage to your wallet

Rebuilt pump cost $950

 

[roscoFJ73]

Likely the lack of previous care led to the problems with the injection pump.

Lack of use is the biggest killer to rotary pumps. If you get a small amount of moisture in your fuel, its sits inside the pump and corrodes the finely machined surfaces. Do you have a water trap somewhere in the fuel lines?

 

[shansen]

Lack of use is the biggest killer to rotary pumps. If you get a small amount of moisture in your fuel, its sits inside the pump and corrodes the finely machined surfaces. Do you have a water trap somewhere in the fuel lines?

I only have the factory filter system. I'm not aware of a water trap in that anywhere; do you know where I would check or what I would be looking for?

 

[roscoFJ73]

Its under the fuel filter. I shouldnt have said water trap, it only traps a small amount of water but it has wire attached that will set off the filter light on the dash.
A water trap can be added cheaply, best place is lower and before the filter. The best ones have glass bottle than can be checked visually.
This one has a tap underneath to drain the water out without letting air in.