Compression adapter - ?
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Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
Compression adapter - ?
I want to do a compression test on a vehicle for someone before they dump any more money into fixing the car. Unfortunately, I can not find any adapters that will fit down into the hole. I keep seeing 14 mm long reach adpaters advertised with compression testers, but, none sold alone. I tried some anti-foul plug adapters, but, they are not long enough.
I am seriously thinking about welding an air hose fitting onto a hollowed out spark plug and clamping some airline to that and the compression tester.
Is there any place that sells these adapters by themselves, before I try something red-necked
?
I am seriously thinking about welding an air hose fitting onto a hollowed out spark plug and clamping some airline to that and the compression tester.
Is there any place that sells these adapters by themselves, before I try something red-necked
?
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
I looked for an adapter by itself all over and gave up. I finally bought a KD tool compression tester that had the long reach 14MM adapter on it. Now I have two compression testers... 
You could use a spark plug shell and braze or weld in a long tube.
I was working on a Ford 2.6L V-6 in a Contour. The spark plugs are in deep holes.
You could use a spark plug shell and braze or weld in a long tube.
I was working on a Ford 2.6L V-6 in a Contour. The spark plugs are in deep holes.
Thread Starter
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Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
There is what I made up and requires no welding (though I do own a welder).
Basically, a 14 mm anti-foul adapter, the standard 14 mm. adapter, which was turned into the first to the point of yield, and a brass nipple that was wedged in there. The threads were not exactly the same, but, close enough torqued down to provide a good seal. If I can find a steel nipple, all the ones I had or looked at where brass or aluminum, I might throw a few fast tack welds on later.
Because I overtighten all the connections, I had no problem using a hose on the end to screw everything into the spark plug hole and out again.
Basically, a 14 mm anti-foul adapter, the standard 14 mm. adapter, which was turned into the first to the point of yield, and a brass nipple that was wedged in there. The threads were not exactly the same, but, close enough torqued down to provide a good seal. If I can find a steel nipple, all the ones I had or looked at where brass or aluminum, I might throw a few fast tack welds on later.
Because I overtighten all the connections, I had no problem using a hose on the end to screw everything into the spark plug hole and out again.
