I need help Fast, Neon Wont Start.
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Registered User
Joined: Nov 2010
Posts: 15
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From: Valley Of Da Sun,Arizona
ok i did a compression test i am unsure if the compressions suppose to slowly drop because 3 of them went high then went down slowly, 1 on the other hand held no compression at all
Section Moderator
Joined: Sep 2008
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From: Northern California
Sounds like a bad compression testing gauge, for starters. The gauge will hold the highest reading until you release the built-up pressure. Well, it's supposed to...
You already know there is a problem. A compression test isn't going to tell you anything new. Something broke internally and the engine will have to come apart to fix it.
You already know there is a problem. A compression test isn't going to tell you anything new. Something broke internally and the engine will have to come apart to fix it.
Last edited by darthroush; Nov 4, 2010 at 06:29 PM. Reason: Grammar issues today...
All Star
Joined: Aug 2010
Posts: 843
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From: Toronto Canada
it will only tell you what cylinders you need worry about
the gague should hold the maximum pressure till u release it
the cylinder with no pressure is the one with the bent valve(s)
start pulling off the head
the gague should hold the maximum pressure till u release it
the cylinder with no pressure is the one with the bent valve(s)
start pulling off the head
Section Moderator
Joined: Sep 2008
Posts: 5,584
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From: Northern California
That's what I was saying. They are not supposed to drop. Your tester is worn/broken. It doesn't matter at this point. The head still has to come off no matter what cylinder has no compression. Take the head off and get going!
Registered User
Joined: Jun 2010
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From: Fort Wayne, IN
While you have the head off, take it to a machine shop for resurfacing and a check-up. Better safe than sorry.
All Star
Joined: Aug 2010
Posts: 843
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From: Toronto Canada
remove the cams
then all valves "should" be closed
turn head upside down and fill combustion chambers with varsol
whatever combustion chamber doesnt hold liquid has the bent valves
thats if the gap between valve and seat isnt obvious
or you could just look at the pistions they should tell you where they hit
then all valves "should" be closed
turn head upside down and fill combustion chambers with varsol
whatever combustion chamber doesnt hold liquid has the bent valves
thats if the gap between valve and seat isnt obvious
or you could just look at the pistions they should tell you where they hit
Last edited by hemi4spd; Nov 11, 2010 at 01:49 PM.
All Star
Joined: Aug 2010
Posts: 843
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From: Toronto Canada
prices here are much different
whole engines are from about 400 and up
heads are about 200 and up
valves about 15 bucks each and your only going to need a couple
and the spring compressor can be rented for a few bucks.
I wish I knew a place to get heads at 30 dollars, its almost worth buying them to strip them down for aluminum scrap at that price
who knows what type of condition the junkyard head is in?
whole engines are from about 400 and up
heads are about 200 and up
valves about 15 bucks each and your only going to need a couple
and the spring compressor can be rented for a few bucks.
I wish I knew a place to get heads at 30 dollars, its almost worth buying them to strip them down for aluminum scrap at that price
who knows what type of condition the junkyard head is in?
