Different Temperature Readings on Exhaust Ports
#1
Three Wheelin'
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Different Temperature Readings on Exhaust Ports
What is a reasonable variation of temperature on exhaust ports?
If the temperature difference is great, like 200% or more different, what does that mean?
If the temperature difference is great, like 200% or more different, what does that mean?
#6
Three Wheelin'
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Hi @V2Rocket - I have a full saga on the engine on another thread. Suffice it to say it is rough idling but runs for a few minutes before measurement. I have measured temps with an IR Gun on the exhaust manifold for each exhaust port.
My 15-year old is out in the garage swapping injectors as we speak from old bosch injectors back to a set of AC Delco injectors which are new.
I'll report back with any updates, soon.
My 15-year old is out in the garage swapping injectors as we speak from old bosch injectors back to a set of AC Delco injectors which are new.
I'll report back with any updates, soon.
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#8
Three Wheelin'
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Replaced the injectors and just ran it for about 2 minutes....
Cylinder 1 - 205F
Cylinder 2 - 350F
Cylinder 3 - 150F
Cylinder 4 - 330F
This may sound like a crazy theory but I still am thinking I have some bent valves. I suspect that would provide different fuel/air ratios per cylinder, right?
The engine is otherwise air tight and now correctly timed.
Cylinder 1 - 205F
Cylinder 2 - 350F
Cylinder 3 - 150F
Cylinder 4 - 330F
This may sound like a crazy theory but I still am thinking I have some bent valves. I suspect that would provide different fuel/air ratios per cylinder, right?
The engine is otherwise air tight and now correctly timed.
#13
Drifting
Replaced the injectors and just ran it for about 2 minutes....
Cylinder 1 - 205F
Cylinder 2 - 350F
Cylinder 3 - 150F
Cylinder 4 - 330F
This may sound like a crazy theory but I still am thinking I have some bent valves. I suspect that would provide different fuel/air ratios per cylinder, right?
The engine is otherwise air tight and now correctly timed.
Cylinder 1 - 205F
Cylinder 2 - 350F
Cylinder 3 - 150F
Cylinder 4 - 330F
This may sound like a crazy theory but I still am thinking I have some bent valves. I suspect that would provide different fuel/air ratios per cylinder, right?
The engine is otherwise air tight and now correctly timed.
#14
Three Wheelin'
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Join Date: Feb 2004
Location: Jacksonville and sometimes St. Aug Beach, FL
Posts: 1,727
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171 Posts
Hey Everyone -
Did a COLD compression test. I know that's not the way to do it but it didn't seem productive to try to warm up the engine.
Anyhow. Compression readings were:
Cylinder 1 - 0
Cylinder 2 - 95-100
Cylinder 3 - 100
Cylinder 4 - 95-100
Before we undertook the endeavor of turning the car from a beater to a beauty 2 years ago, the engine was running and not smoking nor burning oil.
So, the verdict is BENT valves and she goes in for a TakeLotsOfMyMoney procedure on Monday.
I really appreciate all of the assistance here and my excitement for the final outcome is overshadowing the pain of this process.
I'll report back soon.
Did a COLD compression test. I know that's not the way to do it but it didn't seem productive to try to warm up the engine.
Anyhow. Compression readings were:
Cylinder 1 - 0
Cylinder 2 - 95-100
Cylinder 3 - 100
Cylinder 4 - 95-100
Before we undertook the endeavor of turning the car from a beater to a beauty 2 years ago, the engine was running and not smoking nor burning oil.
So, the verdict is BENT valves and she goes in for a TakeLotsOfMyMoney procedure on Monday.
I really appreciate all of the assistance here and my excitement for the final outcome is overshadowing the pain of this process.
I'll report back soon.