Anyone have any ideas?
60 lbs compression on all cylinders
Southern_Thunder
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Anyone have any ideas?
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How was the compression test done ? The SVT is a high compression engine but with the VCT and doing a compression test the compression test wont be very high compared to a normal engine compression test
Why are you doing a compression test , how does the car feel under power ?
Tom
Why are you doing a compression test , how does the car feel under power ?
Tom
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I used a gauge threaded into the spark plug hole. Car won't start. Has fuel and spark, but low compression. Tom I called you about a month ago about the timing issue, and it went pretty smooth after talking to a couple ford mechanics and printing stuff out. I also put a new gasket on the head. Everything was done right though. I'm completely at a loss. I miss driving this thing. :/
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So this was a new timing belt install and now low compression ?
Tom
Tom
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The car overheated and warped the head about 8 mils. I got the head milled and put a MLS gasket back on the head. Got everything back together and times and now it won't start and low compression.
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Are you 100% sure you are back in time , how hot did you run it , could of hurt the rings and pistons ?
Tom
Tom
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The one thing I didn't do was completely check the bottom end. It got hot enough to warp the head. As soon as I felt a loos of power I pulled over and cut the engine off.
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A leak down test will tell you if it is a timing belt installation error or compression going past rings/pistons , thats what I would do or have done next
Tom
Tom
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I'm the one to ask the silly questions to make sure nothing's missed.
When doing the compression test, was it cranked with the throttle open until the gauge stopped rising?
Limited cranking or throttle closed can affect numerical results greatly.
When doing the compression test, was it cranked with the throttle open until the gauge stopped rising?
Limited cranking or throttle closed can affect numerical results greatly.
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4 cycle engine should only be cranked 4 cycles , 2 cycle engines 2 cycles for a compression test
As long as all 4 Cyl were done with the throttle closed then its fine
Ideally Sailor is correct a warm engine , throttle open and cranking the engine 4 revolutions is the proper way to do a compression test
Tom
As long as all 4 Cyl were done with the throttle closed then its fine
Ideally Sailor is correct a warm engine , throttle open and cranking the engine 4 revolutions is the proper way to do a compression test
Tom
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Yes agree , didnt think about that very possible
Tom
Tom
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I will do a leak down test ASAP. I'll post on the info. Thanks!
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