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Unread 05-02-2010, 07:52 PM   #1
elks96
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1985 CJ7 
 
Join Date: Apr 2007
Location: CO
Posts: 521
How does my head/pistons look?

Well I just pulled my head off toady. And here is what I found. The cylinders look pretty smooth. I am concerned that there is way to much carbon built up. Please realize that I had a hell of a time getting the carb and timing set. Also I have 2 distributor gear give out. This again caused timing issues. So the motor has about 3000 miles on it and most were in and out of time.

How does the head look? Should I clean it while out? If so how?


How about the pistons?




Also all the head bolts came out clean, except the very front driver side stud. It was all gummed up with dirty oil/grease. Why would it be messy/gummy?

Thanks for the help. I am learning as I go. Thanks a ton. hope to get my new CAM in this week and have it on the road by next weekend

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1985 CJ 7 258 bored/Cammed, MotorCraft Carb, Mallory Ignition, NP435/Dana 300, 4.5 RE Ex, 1.25 JKS Body Lift, Detriot AMC 20 Rear(detroit locker and Warn Hub Conversion), Herculined Tub, Chevy Heater Blower, 34" Swampers, Custom Rear Bumper, more to come....

1972 K5 8" lift, 36" swampers, lockers, custom paint.
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Unread 05-03-2010, 07:19 AM   #2
elks96
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1985 CJ7 
 
Join Date: Apr 2007
Location: CO
Posts: 521
Any thought? I was told a brass wheel to clean it up.
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1985 CJ 7 258 bored/Cammed, MotorCraft Carb, Mallory Ignition, NP435/Dana 300, 4.5 RE Ex, 1.25 JKS Body Lift, Detriot AMC 20 Rear(detroit locker and Warn Hub Conversion), Herculined Tub, Chevy Heater Blower, 34" Swampers, Custom Rear Bumper, more to come....

1972 K5 8" lift, 36" swampers, lockers, custom paint.
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Unread 05-03-2010, 09:54 AM   #3
1986cj
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1986 CJ7 
 
Join Date: Dec 2007
Location: Denver Colorado
Posts: 1,874
I would not give a second thought about cleaning up the head with a wire wheel to get the carbon off. I have done it many times and never had a problem. Now would be a great time to replace the valve seals too. If it is running, before you tear into it, I have learned to get a can of GM upper motor cleaner (Most dealers will have this) and slowly pour a can down the carb as it is running. Will take about a half hr or so and will smoke like hell but you will be surprised how little carbon will be left when you tear it down. I would not scrape or wire wheel the pistons tops if you are not going to pull them out and re-ring them.
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