Modified oil pump failure

This weekend did not end up so good.. although I guess we could say it could have been worse.. the Car slow down almost for tenths on its last pass.. after picking up my losing time slip.. re fired the motor and noticed it didn't have any oil pressure.. and the starter really struggled to start it... I got it home.. remove the oil pump and found the oil pump Lane in the oil pan

One more

The two main caps that I have removed look perfect bearings are beautiful... five of the rods bearings are in great shape.. three of the rod bearings were to The Copper. And two of the rod caps show signs of heat...

Sorry about your misfortune, came out from it ok by the looks of it considering. Was the pump bottomed on that stud? Or just flat break in half for zero reason?

Do you know why it broke? Was the pick up tube under stress and caused the casting to break off?

Sounds like you caught it just in time except for a couple rods and cleaning up the crank what kind of rods are you using

Oliver rods and a king crank..there was no interference between the main cap and the oil pump... however the pump passage was greatly increased in size...

That is a shame but could have been worse. What are the specs on the Oliver rods?

Howard

Sorry to see this but I'm glad you caught before things turned ugly

Whats your peak oil pressure

Not sure if this is the exact same problem, regardless worth checking whenever in the area, look at Pic #19

https://board.moparts.org/ubbthreads/ubbt...tml#Post1554264

IMO on further review, the enlarged oil passage likely was the initiator of this failure, by weakening the lower oil pump support structure.

edit #2 and the oil pan crushing wheel stand.

6.250 long. 9.27 2.100

80lb at 8800

Okay. Thought i might be able to help you. I have 6 6.125x2.00x.927.

Howard

Sorry it happened , but boy were you lucky. You were darn near tossing a rod out the side of the block

When the motor first went into the car 200 passes ago it did a wheel stand and came down and crushed the oil pan. and hit the pick up.. pretty good.. after a very close inspection I chose to reuse the pump.. and actually shorten the pick up slightly.. so it wouldn't hit the pump.. if it happened again...that was 200 passes ago

Sure looks like the stud was hitting the pump but maybe Im seeing it wrong

2 things.. whats the weight oil and what is the
minimum rpm you see 80#

Shiloh, maybe when the pan got crushed it may have fractured the pump & it finally broke off.

Looking at it again.. you came down on the pan
and broke it

I run 10w30 Lucas synthetic.. and to be honest most of the racing I do is 1/8 Mile at night.. and it's very hard to get a bead on the gauges... from a few videos that I have watched... at speed the Gage is always around 80.... typically idles 1500rpm at 55lb hot

hey Rick good to see you around... and yes this has kind of been our thought to.... mr. P are you suspecting pressure

How big is the outlet hole opened up to? I allways open them to 1/2" and never had this happen. I have had pick-up tube break off and fall in the pan, but never the pump. I see yours has the pick-up in cover, just like the set-up in my Demon.

The passage is way off center too. One more thing to check. I'll be looking at all of mine this weekend.

Sorry to see this after all of the other bs you went through man and hopefully it's repairable...........that thing flies and you should be proud of your efforts and results so far......

mine was just a tick larger at 17/32...this oil pump has had a ruff ride..may the next one will have a belt..

the crank was fine I will ship the rods to Oliver... I think I can buy two and have them put new bushings and new bolts in the others.. I think I'm going to step up on compression... this motor was originally built for bracket racing. and e85 but I never expected it to run this fast.. now I'm caught up in the heads Up Racing stuff..so time will tell..

Good news there........... Good luck man............

Glad to hear it appears to be not so bad...No better time to step up the game than now.

It'd be informative to see if the rod's hardness (Rockwell or Brinell) changed due to the heating.

R.

Is that a crack on the left where the oil pump cover bolt goes in?
Matt

You def caught it in time, could have been much worse. May not be a bad idea to install a oil pressure warning light in the future. I know a few people it helped saved from major damaged, myself included, b/c lets be real how often do we look at the oil press gauge unless something doesn't feel or sound right, but sometimes then it's to late...