Engine Rebuild Cost

[rickybobby23]

Ran our first race of the year, and our first ever with a dry sump system. Turns out the belt came off the oil pump and we lost pressure obviously. The motor is not completely fresh anyway, and talking with guys they suggest we get the motor torn down and looked at since the pressure was lost, which makes sense. Just wondered what a ballpark price is for a refresh/rebuild on an aluminum engine. Also, any ideas what may have caused the belt to slide off the pulleys? Misalignment? Not enough tension?

[Brian Gray]

I tell customers up front its $ 2000.00 labor to tear down and reassemble. Any parts and or machine time required is additional.

Loosing the belt is most likely you pump is not square with the crank or drive.

[MasterSbilt_Racer]

You can't get back out the door with any of the top line builders for under $6500.

[hucktyson]

Your 8-9k with having lost a belt maybe more

[hucktyson]

A lost belt at high rpm is
A possible crank and rods rebuild of 10k plus. The belt coming off is either it was over tensioned , or you used the tensioner to pull the pump right before the lower bolt was almost tight which leaves the pump (not a nice word)(not a nice word)(not a nice word)(not a nice word)ed or your pulley is too far forward which shredds it on the coupler bolts

[Matt49]

Ultimately, it really depends on how bad you hurt it. And nobody is going to give you a ballpark on price until they have it apart. If it ran for any length of time without oil pressure you should get it looked at even if it means you find out you can't afford to have it put back together.
Or just run it and hope it doesn't come unglued and then you're going to be buying a new one.

[grt74]

we run an oil pressure kill switch,it shuts the ignition off by killing the power to the ignition if the oil pressure falls below 10-15lbs,THE BEST MONEY IVE EVER SPENT IN RACING PERIOD,it has saved at least 2 engines easy,it will shut it down before it does a huge amount of damage,i dont care how quick you think you can shut it down to save it,this kill switch shuts it down the instant it falls below 10-15lbs,not to mention your engine builder will love ya for it

[fastford]

I like the pressure kill switch also, if you are gone put the belt back on and try it, I would run it for a few min , cut it off and cut the oil filter open and look for debris on inlet side of filter, I would at least do this before rolling the dice, JMO

[hpmaster]

Any price you get here is just a guess. My last "refresh" on my big engine with 0 problems at 1700 laps was $5500.00, in 2012. That was new lifters, new springs, valve job, new valves, timing set, bearings, polish crank, gaskets, 1 rocker shaft and rings. So with that in mind just go up from there. I am old school, have a big a$$ red trailer light that blinds you if you lose oil pressure.

[TALON75]

1700 laps and no pistons? Your right though, it is just a guess and probably just scorched the crank or a rod bearing or two but it definitely needs to be looked at. I have seen two people just slip a new belt on and hope for the best, they ended up spending way more! We had a loose belt this year, driver caught it pretty quick but still hurt the crank and a couple rods.

[hpmaster]

1700 laps and no pistons? Your right though, it is just a guess and probably just scorched the crank or a rod bearing or two but it definitely needs to be looked at. I have seen two people just slip a new belt on and hope for the best, they ended up spending way more! We had a loose belt this year, driver caught it pretty quick but still hurt the crank and a couple rods.

No pistons, it was it's first build from new. Oil never went more than 3 nights, never over heated and I always use MotorKote. Learned about MotorKote many years ago when I worked as a field serviceman on industrial engines for Waukeshaw engines and we did engine oil spectrographs during engine warrenty. It was the only oil additive that spectrographs proved worked. Ok let all the smart guys blar har about it, I don't care it works. By the way you don't have to treat an engine as much as MotorKote says.

http://motorkote.com/10oz-motorkote-hyper-lubricant.html

http://motorkote.com/test_results

[hucktyson]

HP .... Which builder is recommending 1700 laps ?? The builders I know replace pistons after 1000- 1100 laps ...I'm not saying your wrong but I have never seen anyone recommend that long of an interval

[hpmaster]

HP .... Which builder is recommending 1700 laps ?? The builders I know replace pistons after 1000- 1100 laps ...I'm not saying your wrong but I have never seen anyone recommend that long of an interval

Me. My experience has been I have had zero issues with my motors at 1500 to 1700 laps with me taking care of them. I was an engine builder in the 1970's and 1980's. The builder I use is in Cedar Rapids Iowa and in 10 years I have had no issues what so ever with his work. He said my engines look great at the 1500 to 1700 lap area. I really do believe it is MotorKote. MotorKote was developed years ago by a lubrication engineer from Michigan State University. He sold it out of his trunk for years. I ran into it when reviewing spectrograph reports on an engine that was under warranty in the oil fields. It came back with numbers about 90% low for metals in the oil. As the motor was under warranty I suspected a large oil loss from a leak was covered up with fixing the leak and replacing the oil, these engines have remote oil filters of over 30 gallon capacities. I went back to the owner and told him what I suspected. He admitted using this MotorKote. So I tracked it in his engines with spectrographs and ALL came back with similar results of 80 to 90% lower amounts of metal in the oil. So I started using it in all my engines, rearends and transmissions. I got 315,000 miles out of a Chevy 1983 4 speed automatic with it and had 305's go over 400,000 miles with just a timing set. Nuff commercials for today the sh!t works. Use the links in my earlier post, then go to Wally World and buy some. Just had a guy ask why I didn't say who builds my motors. I don't care who they are or who you are some dillweed will have a different view. If you want a builder go ask people you trust, make your own choice and live with it. If you really want to figure it out there is GOOGLE.

[Brian Gray]

I cool blue coat all moving parts and have engines going 2000 +

I've heard of guys using motorkote and linkite never tried it though.

We have much better component selection now even years ago I seen short track engines make 2500 and guys would run em till the second ring disappeared. 250 laps at Daytona is more run time than 2500 laps around a bull ring guys.

[el paso mod 19]

I just bought a bottle at Wallyworld. I have a 6 1/2 quart pan, will 8 oz of this be enough? If it does it would be good for 4 oil changes.