LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Electric Water Pump Reliability and CAM choice

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Old Mar 15, 2003 | 10:57 AM
  #1  
pennys58's Avatar
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Electric Water Pump Reliability and CAM choice

I was wondering what the life expectancy and reliability the Meziere wp had? I am beginning the upgrades on my car including ported and polished heads flowing 275/195, Jet Hot LT headers, Dr. Gas X pipe full dual exhaust, 58 mm TB, CIA, MSD, other little bolt-ons. My other question was about the cam. As of now, I have 3.42's and a stock stall. I was looking at, as far as a cam, a few cams to incorporate into the set up...XE224-230, hot cam, or xe230-236. I am looking for an everyday driver with good low-mid range hp and torque. I could sacrifice dyno #'s for more drivability. Let me know which one you would recommend. Also, is it easier to take the heads out with the engine in...or out. If it is easier to take them out while the engine is out...how hard is it to take the engine out. Sorry for all of those outs!
I will, over time, put a stronger rear end in when I have the $$$$. What other parts would you recommend for this increase in h.p.
Old Mar 15, 2003 | 11:03 AM
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Try a search on this, there was a thread not too long ago here that dealt with the electric water pump life span of different companies, it was a pretty detailed thread with lots of feedback, that should help you make a choice as to which one to get.

also it dealt with price vs. value
Old Mar 15, 2003 | 11:05 AM
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for an everyday driver, i would not go with a electric water pump, there life span is much less
Old Mar 15, 2003 | 06:38 PM
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Originally posted by 94_formula
for an everyday driver, i would not go with a electric water pump, there life span is much less
That's BS....my first Meziere lasted well over 80,000 miles, over a 3 year period. My buddy's Meziere taht I put in at the same time my first one was done, is still going strong 5 years and 60,000 miles later. The electric pump is a BENEFIT on a daily driver, especially if you do a lot of stop and go driving, because the electric pump puts has better flow at low rpm than a stock pump. The stock pump only turns as fast as the cam turns it. The electric pump turns a constant speed all the time. The only time an electric pump is a disadvantage is prolonged high rpm runs, like open road racing. And even then you can offset the shortage with a manual fan switch.
I don't know who keeps perpetuating the myth about electric pumps being bad news. I'm guessing it is someone who didn't know how to install one and bleed the system when they were done. I don't know.....
HTH....
Old Mar 15, 2003 | 07:57 PM
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80000 miles sounds good to me I won't be dragging it all the time...more of a daily driver and weekend trips to the strip. I just know that the EP adds 7-10 on the dyno but if it were going to be a waste of time because of the hassle, I was just going to let it go.
Old Mar 15, 2003 | 08:30 PM
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Figure it this way.

Most of the electric pumps claim a 2000 hour life expectancy.

If you drove your car for 5 1/2 hours a day, everyday. It would take a year to get to 2000 hours.

Now if you drive it everyday for an hour a day. Then your would get 5 1/2 years of driving before you get to 2000 hours.
Old Mar 15, 2003 | 08:59 PM
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G22 is right. I'd say get it. Once you have it its very easy to replace unlike changing the whole water pump, all you have to do is take off your fans and un screw the motor then put the new one on.
Old Mar 15, 2003 | 09:36 PM
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I would probably only drive about 2 hours daily on average...so still 2.5 years or so. That isn't bad...I just don't want my wife to be driving the car and the thing goes out and things go sour...will it mess things up if not recognized...I could see it now..."All of the sudden the engine started smoking...sorry". Please tell me that won't happen
Old Mar 16, 2003 | 03:36 AM
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ya there really is no warning, thats why I won't get one, even when I had a waterpump brake in half(the housing) itstill worked, where I could drive it without worrying about my engine overheaing. If you get one, I would highly recomend some type of light that warns you of danger. I mean how often do you look down at that gauge to make sure things are going right? even if you stare at it constantly you might miss it, and it only takes a minute to overheat. The only advantage I can see is being able to use a true roller timing set, and since your going with a smaller cam, you won't need one, sure it would be peice of mind, but if your not reving to the moon, why bother with one. Plenty of guys use the stock chain. I drive 2 hours per day, and my stock pump lasted 60, 000 miles, and even when it leaked it still worked well. The electric just stops and thats it. Some guys carry a spare pump in the trunk, its a good idea if you do lots of traveling across barren land.
Old Mar 16, 2003 | 08:15 AM
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Originally posted by KissMySSFiero
Figure it this way.

Most of the electric pumps claim a 2000 hour life expectancy.

If you drove your car for 5 1/2 hours a day, everyday. It would take a year to get to 2000 hours.

Now if you drive it everyday for an hour a day. Then your would get 5 1/2 years of driving before you get to 2000 hours.
I believe Meziere offers theirs with a 10,000 hour life expectancy.....and it only takes 15 minutes to wire in a warning light.
I had a connector fail on mine a few times when I had first put the electric pump in, and never have had any pistons melted to the cylinder walls or head gasket problems.
Also, while it seems to be common belief that if an electric pump fails it just QUITS, 99% of the time they seep coolant out of the weep hole, just like a stock pump, before dying. I've worked on a buttload of them, and have yet to see an electric pump just DIE suddenly while driving.
Old Mar 16, 2003 | 02:14 PM
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This is a really hard decision to make. I didn't know everyone was so split on this. D James made a good point about my cam being small and not really needing an EWP. On the other hand, G22Lvr made a good point about 10,000 hour life expectancy with a warning light only taking ~15 mins to wire. How long will I have to stop when the light comes on? I really apreciate this help. Will there be anyother benefits to having the EWP other than the ~7-10 hp? Should I just keep it stock? Thanks
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