Vampire pump problem for uoa

[haley10]

I got a Blackstone pump with the 1/4" tubing and found it will not go into the oil pan far enough to draw a sample. GM 3800 Series II V-6. All I can guess is the bottom of the passage narrows significantly. It only goes in about 3/4 of the dipstick length and then no go. Anyone know why for sure??

 

[Gary Allan]

Wow, looks like you're on your own here.

I guess no one else uses a pump in that engine configured that way.

You may be able to go down to The Home Depot and get a same ID/smaller OD tubing and see if it will make it beyond the choke. I doubt that you can get so thin that it will collapse drawing a sample.

Additional thought: Have you cut the end of the tubing on a steep bias and then send it down at various orientations (90° - 180°- 270°- etc.) to see if it's just hitting some ledge/step that it needs to get over??

 

[haley10]

quote:

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Originally posted by Gary Allan:
Wow, looks like you're on your own here.

I guess no one else uses a pump in that engine configured that way.

You may be able to go down to The Home Depot and get a same ID/smaller OD tubing and see if it will make it beyond the choke. I doubt that you can get so thin that it will collapse drawing a sample.

Additional thought: Have you cut the end of the tubing on a steep bias and then send it down at various orientations (90° - 180°- 270°- etc.) to see if it's just hitting some ledge/step that it needs to get over??

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Good ideas, thanks.

 

[D C Anderson]

The tubing could be curling up on you as you push it into the oil pan. If you buy another piece of tubing, make sure it is 1/4 inch OD. (We use 1/4 inch poly-flo) It has to be this to make a seal so that the bottle will develop a vacuum when pump the plunger.