The "Dollar Bill" Test
Contributed By: Bill "Willy" Trautman
I don't know what you would like to call this but its in reference to "rough"checking to see if you need to have a valve job or a new timing chain installed;
If your FSJ or any vehicle for that matter, runs poorly and possibly backfires through the exhaust or carburetor you may want to check to see if its in need of a timing chain or valve job. listed below is some very simple test`s that you can perform that dont cost any money.
The easiest way is to do a pressure test ( for the most of us that is)
You will need a manual to know just what pressures that your engine should be at so I wont go into anything on this because it will tell you in the manual how to do it.
I learned these simple test`s a long time ago and they sure come in handy when your trying to buy a used vehicle. Its not to hard to pull out a dollar bill and put it up to the exhaust with the owner of the vehicle standing there.:)
I had done this test with the Jeep that we currently own now just before we bought it and it sucked up the dollar and after checking the timing chain, I discovered that it was bad..... the balancer moved about 1 1/2 in!!! Its a wonder that it even ran.( which,by the way, it barely did.)
After I replaced the timing chain it didn't suck up the dollar bill anymore but it still didn't run right so I did a pressure check and discovered that the pressure was below normal in two of the cylinders and I had a blown head gasket!! Well, now the engine is out and I am planning on getting a short block in the first part of March. Our Jeep had 177,775 miles on the speedometer so a rebuild was due. :(
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