Rebuild with out oil pump?

[Prez]

Who has done a rebuild and used the same fron cover and oil pump? Been ok? How can you tell if an oil pump needs replaced?

 

[neuro]

I'd just replace it anyway. Why take the risk of it failing later and destroying your motor? Better safe than sorry.

 

[Awdboost]

You can just replace the gears to be on the safe side. That a whole lot cheaper.

 

[Prez]

We had it apart to do the BS removeal mod so we could put the stuby shaft on it and checked the gears and the had no wear and turned fine and lubed em up real good with pre-lube.

I just got done reading some horror stories and am about sick to my stomach about blowing up my fresh rebuild.... my engine builder said I should be fine he's done many engines. So I guess we'll see.

Just wondering if anyone else has left their oil pump in there or if the norm was to buy new.

 

[newtypedsm]

i just had my motor replaced because the oil pump failed. so, after spending $2000 in repairs, of course my suggestion would be: replace it. in the bottom of the oil pan were the bearings to the oil pump shaft and the bore for the shaft in the block was oval shaped.

is dry sump a possibility?

 

[98TalonTSi]

Topline makes a really nice front cover. I'd say comparable to the OEM but quite a bit cheaper.
I'd also hate to loose a $2g motor to skimping on standard maintenance. Even though my car had 60,000 when I pulled my Balance Shafts, I knew I wasn't replacing the whole front cover, so I just replaced all the gears...cost about $70 from then Conicelli.

 

[Turbo Talon DL]

:thumbdown REPLACE THE DAMN OIL PUMP!!!... :thumbdown Ok, now that everybody agrees with me on this one, its not cost effective to do a rebuild without a known NEW oil pump. I'd rather spend whatever amount of cash on another NEW oil pump than to risk loosing a $2500+^ rebuild to an old oil pump you knew that you should have replaced anyhow!!! So, replace your oil pump on rebuilds and everything should be fine. Oh, and do the balance shaft mod PROPERLY.

 

[half-cocked]

At the very least replace the gears and the seals in the front case.

 

[91gvr4]

Prez, there is a machine shop in Omaha that sells the front case for $159. Willard Auto Machine.

Later

 

[DSMatMSU]

i re-used mine... it only had like 90,000 on it to begin with... the manual has specs too... you can check the clearances and what not... if they are in spec i see no reason to replace it... i mean, you figure its going to at least last as long as the timing belt you just put on is... so if your tight on cash now... you could wait and do it the next time you replace your belt....

thats mah plan

plus i have good oil pressure... just keep an eye on it with your gauge

 

[98TalonTSi]

^ Not to be a d**k, but that's just silly. Why are you giving bad advice? Tight on cash when building a motor worth a couple grand?
It's only a matter of time....

 

[Batty200]

^ Not to be a d**k, but that's just silly. Why are you giving bad advice? Tight on cash when building a motor worth a couple grand?
It's only a matter of time....

Checking clearances and using good used parts is the smart thing to do. It is better than buying new and not double checking. If using old parts was bad then people would never rebuild motors they would just buy new shortblocks.


Later

 

[98spyderboost]

I just spent $2k on a bran-new short block from Mitsu. Doesnt include oil pump or pan. Pump was another $160. Guess what. I bought a pump Rebuild or not.... 2K in a motor>? BUY A NEW PUMP

 

[alexg1323]

some of you love to waste money. dont just reuse the pump, put properly inspect it and do the proper clearance measurements of the gears. If its fine then my god just re use it. Ive found a pump with a 160k on it in mint condition used it and guess what still worked fine.

 

[4GSixty3]

I re-used mine. Car has great oil pressure.

 

[diambo4life]

Could you have sex with a prostitute who has AIDS with a condom and just be fine? Sure you can. Would you want to risk the possiblity of the condom breaking and you getting infected? Probably not. Same thing with the oil pump. It's your decision.

 

[4GSixty3]

Could you have sex with a prostitute who has AIDS with a condom and just be fine? Sure you can. Would you want to risk the possiblity of the condom breaking and you getting infected? Probably not. Same thing with the oil pump. It's your decision.

I like I like .

 

[heavyD]

I wasn't aware that the 4G63 suffered from chronic oil pump failures. If you are going to replace every single part on a rebuild, you may as well buy a complete new shortblock. Unless the engine has more than 150K miles I don't see the point of buying a new oil pump if the present one measures up to spec. Plus there is no guarantee that a new one will last any longer than the original.

 

[ar4speed]

My experience is to buy a new pump. I just sold a 7 bolt (block, pistons, rods, crank) to someone with only 60,000 miles on it. All of the clearances were good and what I sold him was assembled. He bought used stuff (head, front cover, etc.) to put on it and found a friend with an oil pump that had been sitting in a garage for two years. He was trying to save money. Well, 300 miles down the road the entire motor locked up. Now he says I sold him junk, and wants me to replace his motor. Buy a new one is my advice.

 

[alexg1323]

sitting for two years, you said it yourself. did he even check it over first? ahh oh well i guess ill join the band wagoon. I recommend everyone goes and replaces there pump by the end of the week. im gonna get an HV one tomorrow now. just incase you know

 

[EVIL X]

Some have said to just replace the gears. :thumbdown If you just replace the gears, in a worn out case you wont get anywhere. The mitsu pump uses the case as part of the "clearance" so basically if your pump is shot, the vfaq method of checking it will assure you right away. Your pump is either in spec or it isnt. I had a local that lost a brand new vendor motor due to a faulty NEW MITSUBISHI front case/pump. Just check the one you have and go from there.

 

[rob_rousseau]

I wish i could be driving my DSM right now, but an oil pump problem did some nasty things to it PLEASE listen to all these ppl

 

[DSMatMSU]

ome of you love to waste money. dont just reuse the pump, put properly inspect it and do the proper clearance measurements of the gears. If its fine then my god just re use it.

exactly my point... yes you CAN buy a new pump, but if everything is in spec why the hell would you buy a new one??? espically if you dont have money... its not bad advice its, its called being cost effiecent... not everyone has money coming out of their ass to buy all new parts for their car... some ppl want piece of mind, some ppl want to be practical... and its more practical to keep something thats working...

would i have liked to change my pump, HELL YEA... but it just wasnt possible... i see what your saying and i would recommend that anyone who has the money to buy one... but at the same time you cant discredit re-using something thats IN SPEC! if its in spec its not suppoased to fail... so the way i look at it, if its going to go then you pissed your car off, or it just wasnt ment to be... if your driving around everyday and oil pressure is fine... and one day your full throttle at 7000 rpms and your pump shits... i seriously doubt it failed from something you could have prevented 'IF' everything was in spec to begin...

dont be an idiot and watch your oil pressure gauge....
or if you have the money, BUY A NEW ONE!

oh yea, plus your blocking off the balance shafts... that aught to help out a worn pump to begin with, bump up the pressure a little...

practical or piece of mind is the question???

 

[gixrman]

I wasn't aware that the 4G63 suffered from chronic oil pump failures. If you are going to replace every single part on a rebuild, you may as well buy a complete new shortblock. Unless the engine has more than 150K miles I don't see the point of buying a new oil pump if the present one measures up to spec. Plus there is no guarantee that a new one will last any longer than the original.

Ive never seen or read in a remanfactured engine build sheets were they listed "we checked the old oil pump, it was ok so we put it back in." ALL MOTORS NO MATER WHO MAKES THEM COMES WITH A NEW OIL PUMP. the oil pump is a wearable item. Would you use old bearings, rings just becuase they were within spec.? You may be able to get away with it once or twice but the odds are agianst you.

 

[alexg1323]

oil pump and bearings, good comparison except ones made of babbitt material made soft for a reason and the other is steel in an aluminum casing