Author Topic: Heating/ Compression issue????  (Read 10832 times)

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Offline 38flattie

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Re: Heating/ Compression issue????
« Reply #30 on: August 17, 2014, 07:33:32 PM »
I don't believe you can do a leakdown on the bottom of the stroke_ I believe a valve is still open but will check it out
With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

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Offline Richard 2

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Re: Heating/ Compression issue????
« Reply #31 on: August 17, 2014, 07:52:22 PM »
Next drain the coolant and pressurize cooling system with air and listen to each cylinder, and the intake and exhaust ports (don't think so but you never know, got to rule it out) .
Some times you need to start looking at the end to find the beginning.
Richard 2
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4 cylinder Esslinger
Could of had a V8

Offline hotrod

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Re: Heating/ Compression issue????
« Reply #32 on: August 17, 2014, 07:53:23 PM »
If it is on the power stroke and before the exhaust valve opens (might have to block the crank before BDC depending on you cam timing) would work.

The other possibility is do you have a way to block off the top of the blower and pressurize the intake tract to see if you have a pin hole in an intake port or gasket leak into the coolant passages on the intake side?

You would have to prevent any of the intake valves from being open but that would eliminate one other leak path.

Other option would be to pressurize the cooling system to full system pressure and slowly jack over the engine and see if you get water in one of the cylinders or dripping out of a header pipe.

Some of the turbo guys find hidden leaks in the intake or exhaust system by pressurizing the piping with smoke.

http://www.theturboforums.com/threads/363900-DIY-smoke-machine-tester!

Offline manta22

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Re: Heating/ Compression issue????
« Reply #33 on: August 17, 2014, 08:21:15 PM »
Buddy;

It is not unheard of that a pump can have its impeller loose on the motor shaft or even be eaten up with corrosion. In that case, the water inside the pump housing is just being slung around inside the pump with little external flow into the engine. Can you drill & tap an 1/8" NPT fitting into the pump outlet for a pressure gauge and check that the pump is actually pressurizing the block with water?

Regards, Neil  Tucson, AZ
Regards, Neil  Tucson, AZ

Offline 38flattie

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Re: Heating/ Compression issue????
« Reply #34 on: August 17, 2014, 08:25:04 PM »
Neil, I have a real good Stewart Warner pump on my chiller. I have ordered an adapter, and when it comes in  going to move that to the water system, along with a gauge! Thanks!
With sufficient thrust, pigs fly just fine. However, this is not necessarily a good idea. It is hard to be sure where they are going to land, and it could be dangerous sitting under them as they fly overhead. -- RFC 1925

You can't make a race horse out of a pig. But if you work hard enough at it you can make a mighty fast pig. - Bob Akin

http://www.flatcadracing.org/
http://youtu.be/89rVb497_4c

Offline jdincau

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Re: Heating/ Compression issue????
« Reply #35 on: August 17, 2014, 09:22:53 PM »
38
     I don't have anything to add re the basic problem. To help with the air bleeding problem I drilled and tapped my cylinder head at the highest point in the water jacket and put in a brake cylinder bleeder valve. It makes getting the air out of the system easier. I don't know if this is possible with your setup but I thought I would share it.
Jim
Unless it's crazy, ambitious and delusional, it's not worth our time!

Offline desotoman

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Re: Heating/ Compression issue????
« Reply #36 on: August 25, 2014, 06:02:22 PM »
Buddy,

How are things going? Have you found the source of the bubbles in the coolant? We need an update.

Tom G.
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