stuck pistion ring.

[OnThe7ThDayFord]

Hello guys… Thanks for your time.

I just got a 66 c10 with a sbc 400. The truck has set for over 4 years??? but it was last tagged in 03. The last owner told me when he parked it he put trans fluid in every cylinder. He also said the engine had been rebuilt not along before it was parked.
When I pulled the plugs they did smell of trans fluid.

Today I rain a compression check and got 120+ on al cylinders but 2
http://basic-help.blogspot.com/2010/…-on-chevy.html

cylinders 3 and 5 only had 75+ (When I pulled the plug from 3 there was alote gunkish mudish stuff come out but did spell of trans fluid ***I did not smell anti freeze***) (Number 5 had a lil but not near as much)
To me this screams blown head gasket

Since 3 and 5 are next to each other -The low compression makes me think the head gasket is blown between the two cylinders.

Iv had a few guys say the valves may not be sealing properly and that I should fire it up and let it run for a half hour and then see what happens.

What worries me is what and wear did this muddish stuff come from.

What are the chances this is a head gasket issue and not a block cylinder wall issue?
I find it funny that there cold be two bad cylinder walls right next to each other and all the other be right at 120.

Im praying its a gasket issue. tell me something good please…

side note… I did try to fire her today. I have the tank out for cleaning so I dumped fuel in the carb and gave her a crank. She fired right up- she didn idle the best but I was able to chock the carb a little and give her some gas and she sounded alote better until the carb ran out of fuel. I test fired her a 2nd time and watched the oil psi gauge and even with low rough idle the oil psi went up to 25psi (Im using a after market gauge not the stock one) (There wear no knocks or bangs or such)

Any advice???

Topic

[EricTheCarGuy]

You can actually check for a combustion leak using this test.

It is possible you have a head gasket issue but I like to make sure when I can before I pull the trigger on taking the engine apart. Keep us posted on what you find.

[Author]

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