Harbor Freight Leakdown tester, How does it work, or is mine just FUBAR? |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Harbor Freight Leakdown tester, How does it work, or is mine just FUBAR? |
VaccaRabite |
Mar 15 2008, 09:51 PM
Post
#1
|
En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
So I took out the new HF leak tester to play with it.
I just put on the 3/4 bank of pistons/cylinder and torqued down the head. Get N03 to TDC. Pull the tester out of the box, and the leak gauge is showing about 40% leak before I even plug it in. OKay, so I read the instructions, as this looks like it works differently from the last tester that I used. Directions say to hook it up to the engine. Then depresurize the regulator until the leak dial hits zero. Then it should give me a percentage loss. Huh? There has to be somehting else I do to show the percentage loss. I have not changed the tool from setting it to zero. Tool 1, Zach 0 Someone that has used one of these things please pipe in. What am I not doing. Zach |
SLITS |
Mar 15 2008, 11:26 PM
Post
#2
|
"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
As I remember, you set it to zero before hooking it to the cylinder. If you are using 100 psi feed, you will see about 15 on the guage when it is "zeroed". Then you plug it in to the engine and it will read leakdown as a percentage.
Before you disconnect from the engine, bleed the air pressure down with the regulator on the leakdown tester. If you don't the needle will slam into the stop and beome permantely set at 45% (unpressurized) which may have already happened. After I discovered this, I bought a new one and returned the old one. Hey, it's just numbers .... a cheap tool ..... all the engines I have tested (most not run in a long time) run between 25% to 35% leakdown. One of the days I may try it on an engine that has been run recently. |
VaccaRabite |
Mar 16 2008, 08:11 AM
Post
#3
|
En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Before you disconnect from the engine, bleed the air pressure down with the regulator on the leakdown tester. If you don't the needle will slam into the stop and beome permantely set at 45% (unpressurized) which may have already happened. After I discovered this, I bought a new one and returned the old one. I think that is exactly what happened to mine. I have a feeling I got one that had been returned. Zach |
Lo-Fi Version | Time is now: 12th June 2024 - 04:17 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |