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Author Topic:   oil pumps
6x
Dirt Roller

Total posts: 7
posted June 16, 2001 01:51 PM
anybody got an idea why we would be breaking the oil pump off, it only seems to happen on rough tracks, but there isn't even a scratch on the oil pan??????????/ what does everybody/anybody think???

CUSTOMPERFORMANCE
Dirt Freak

Total posts: 213
posted June 16, 2001 04:22 PM
WHAT BRAND IS THE OIL PUMP? I HAVE HAD NOTHING BUT PROBLEMS WHEN I HAVE USED SOMETHING OTHER THAN A HIGH VOLUME MELLING.

Pickel
Dirt Freak

Total posts: 239
posted June 16, 2001 10:02 PM UIN: 25419780
One possibility....check the play in your distributor. If you have an intake that has been milled you need to check to make sure your distributor has plenty of play in it. You may be forcing the pump shaft down too tight. I have seen that before. What kind of motor are you running?

6x
Dirt Roller

Total posts: 7
posted June 17, 2001 09:35 PM
I am running a high volume melling in a 406 , and it snaps off about 2 inches down on the casting in the same place every time, possible bad crank? its a steel forged, only got about 25 shows on it.

sdhnc29
Dirt Full Roller

Total posts: 74
posted June 17, 2001 11:00 PM
If your using a big block high volume pump , then yes , I've seen it happen . The ones that I've seen broken , or more commonly cracked , are busted in the corner where the machined flat surface for the pump bolt meets the pump housing . You will usually find a very sharp machined corner there . We found that if you radius this , it will help the pump last a little longer . But as you said , this is normally a problem for guy's who run on very rough tracks , probably because of the weight of the pump . I've never seen this problem with a small block pump .

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