Seansexton53 wrote:
How do you pressure test?
https://www.youtube.com/watch?v=zdq7NRcUIp8Seansexton53 wrote:
I was told avgas by the previous owner but I've also heard that I shouldn't run it? I was all for it but what is the controversy over it?
There have been MANY melted pistons on this site.
Just look in the tech section and you can read for ever about it.
I am a firm believer in AVGAS because I too have had many holed pistons until I switched to AVGAS. The AV fuel allows you a big safety margin if there is something wrong with your
Engine like a small air leak. Pump fuel will detonate if your Engine is not perfect.
I actually posted a thread and asked who ran it. The results here are 50/50.
You choose --- it's your dollar.
Searching for info: The best way to find something here is to use the search box above.
In the search box type ONE word ONLY and hit enter. If you don't you will get to many hits.
When the list of threads comes up there will be another search box there on the right.
In that box type ONE word ONLY. Keep doing this as many times as you want until you have narrowed it down. Some common words will be ignored like "Engine" "Honda" etc.
Also at the very bottom of any thread you read will be an area where there a similar threads to the one you are reading. You can click on them to read.
CO
EDIT:
You asked "how do you know if it needs to be re-bored ?"
You can post CLEAR pics on this site or you can take it to the machine shop and have them look at it.
If you can't hook your fingernail on anything then I bet my rent money it just needs to be honed a bit and a new piston/rings.
CO
EDIT again:
Please note that in the video they forgot to tell people that the piston must be in the down position when you do pressure tests.
The reason is that if the piston is at TDC (Top Dead Center) and you pressure up the Engine, then the combustion chamber is closed and the pressure will slowly leak past the rings and your gauge will show a leak. Obviously you don't have a leak because the crankcase pressure is leaking by the rings into the combustion area and NOT leaking out of a seal.
CO