So I have a slight oil leak issue...and I think the bungs on my headers aren't pulling enough vacuum out of the mill. I just stopped at Wafflebatter's house last weekend up in NY and he had put a electric pump off a S10 on his new 421 SBC...he pulled the cap off the other valve cover and my hand was darn near glued to the hole. I was thinking this would be a "frugle" way to maybe keep the oil leaks down...any input??

I used to use the one off Corvettes.. They work good enough, but use quite a bit of battery power. Lots of amps..

I think they pull 8" of vacuum.


Chris..

Thanks Chris...I figured I would run it while I was going down the track and for a few minutes after the pass...I do run an alternator..watcha think?

With an alternator it's all good..


Chris..

I've been using a GM one, IIRC off a Firebird/Camaro; pulls 5" even though we took no special pains to seal up the crankcase as far as the front crank seal. It hasn't been a problem as far as amp draw, but I run an alternator. I ran a relay for it. It definitely helped the low-tension ring seal on my 368" SB. The whole thing including the catch tank might weigh a few lbs.

how about a part number and is this a dealer item or can I get one thru a parts house.

Just get one @ a wrecking yard.

1995 up If I remember. I used to have the part number, but not any more.

It is an air pump from Firebirds, Cameros, and Corvettes..


Chris..

http://cgi.ebay.com/ebaymotors/NEW-RACIN...=item1e62fcf5f7

That's the one..


Chris..

You guys think it might help with the leaks?

Mine didn't leak with the old pan evac setup, but they didn't pull much vacuum. Used to smoke a bit from oil getting past the low-tension rings, but the pump fixed that.

Eric...A few years ago when I worked on rebuilding ambulances,we used to replace the vacuum pump in the patient compartment. They would toss em to the garbage. They were 12 volt and probably were around 6-8 pounds and ran off of 12 volts. I don't know how many amps they pulled. Always thought about trying one of those..Also,there wasn't any disgusting stuff in them..

Are these used along with a header evac system, or as a stand alone unit??

Stand alone..

Been running one for alot of years, it didn't help the performance of the engine any but it sure took care of the nagging leaks I had at the rear main seal and the valve covers. One side note, I run methanol and the pump really helped to avoid milking the oil if I run the pump while I am warming up the motor.

Can somebody post a picture or a part number?

Lee

I posted the same question on my radiator cap question. I want to run the electric vacuum pump that is listed above. I seem to have some leakage running the .043 top and second ring and 3.0m oil ring and the header evac just is not enough. Question is do I run it all the time or only at WOT? My alternator only charges at 4500 rpm and above. If I run it all them time will it kill my batteries? Should I run a relief valve so I dont have oiling issues and do I only hook it up to one valve cover or both? Thanks Chuck

Turn it on as soon as you go into the box.

Turn it off after the run..


Chris..

I can do that, I think . What about the relief valve and one or both valve covers? Also, what tank do you use? Thanks Chuck