1983 6.9
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Junior User
Joined: Oct 2004
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1983 6.9
I've been looking for a 6.9 project engine for a while. I know the late 6.9's are preferred but have not found one yet. I did stumble across an '83 though. Should I avoid it or is it OK as a foundation? Just looking to build up a rock solid stock engine (no turbo) that will go a million miles.
thanks,
thanks,
Post Fiend
Joined: Nov 2004
Posts: 5,638
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From: Manitoba
I would pass over any 6.9 prior to mid 85........ due to cracks in the block at the block heater hole.
According to the update I have the updated casting was implemented starting with block number 173828 (which translates to roughly halfway through the '85 model year).
6.9 blocks up to serial #u2u17900 had a thinner casting around the block heater. It is very common for these blocks to crack.
According to the update I have the updated casting was implemented starting with block number 173828 (which translates to roughly halfway through the '85 model year).
6.9 blocks up to serial #u2u17900 had a thinner casting around the block heater. It is very common for these blocks to crack.
Laughing Gas
Joined: Mar 2006
Posts: 1,083
Likes: 1
From: Fitzpatrick Alabama
Everyone says that, but I've got two 83 trucks and an 84 and I've never had any problems, a the two 83 trucks have no telling how many miles on them, and the 84 has had the block heater plugged in almost every night since I've had it three years, never had any problems.
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