What did you do to or with your CJ today?

[duffer]

Just be cautious with the 400sbc they are Siamese blocks and are prone to over heating as they don't have true water passages but rather steam holes. Open highway running would be fine but off road with a smaller radiator (Jeep is much smaller than the cars they were in) may not provide enough cooling.

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In my experience, the 400's are not any more prone to over heating than any other Gen I sbc. Yes, what works for a 350 may come up a bit short for 400 cid but that isn't the engine's fault but rather due to the additional displacement. If you are still using the radiator for any of the stock Jeep power plants, you failed to properly engineer the swap, period! Welded aluminum radiators work a lot better than the brass versions but you still need a well fit fan shroud, no matter what type of fan, to make the system work well.

My latest sbc in my CJ 3B is nominally based on the 400 block but it doesn't have steam holes.

 

[Manic Mechanic]

In my experience, the 400's are not any more prone to over heating than any other Gen I sbc. Yes, what works for a 350 may come up a bit short for 400 cid but that isn't the engine's fault but rather due to the additional displacement. If you are still using the radiator for any of the stock Jeep power plants, you failed to properly engineer the swap, period! Welded aluminum radiators work a lot better than the brass versions but you still need a well fit fan shroud, no matter what type of fan, to make the system work well.

My latest sbc in my CJ 3B is nominally based on the 400 block but it doesn't have steam holes.

The biggest issue is it's a different block as it is a Siamese block. The 400 differed from other small blocks in that the cylinders were siamesed and therefore required 'steam' holes in the block, head gaskets, and heads to help alleviate 'hot-spots' in the cooling system at the point above the siamesed cylinders.Siamesed cylinders are engine cylinders arranged in such a way that they have no channels between them to allow water or other coolant to circulate.

So yes while a good aluminum radiator works great for a 350 or 383 etc there's always the chance of running into heating problems. Now that is true for any motor big or small it's one of the reasons Chevy put this mil to pasture after a short run.

On the same token I know some that have never had a problem with there's. In the end to each there own.

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[Patrick]

Took some time to revitalize an ugly corner. Don’t mind the rust.

 

[Patrick]

Finished my spring plates. No more steer clunk.

 

[Patrick]

Heading out to the annual Turkey Trail…

 

[Manic Mechanic]

Nice plates

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[CJ]

Finished my spring plates. No more steer clunk.

Heading out to the annual Turkey Trail…

The plates look great and heavy duty.
Have a good time on the trail and don't forget picks for our Trail Rides forum.

 

[Belizean]

Nice Job !

 

[Papoumd]

Getting in the Christmas spirit

 

[Manic Mechanic]

My temperature gauge quit so I installed a new one. Just in time for a winter storm tomorrow morning

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[TSB8C]

Ah, those good ol' unreliable CJ gauges - right? Maybe time for an upgrade to Dakota Digital or Speedhut.

 

[Belizean]

Mine has always been pretty accurate, sitting there in the middle like it should be in the gauge, for either the original 4 banger and now the AMC 258 i6 / 4.2l , but with the engine swap I have some reassurance with backup now. Now I do know it was an accurate idiot light. .

 

[Manic Mechanic]

Ah, those good ol' unreliable CJ gauges - right? Maybe time for an upgrade to Dakota Digital or Speedhut.

Actually that died years ago. It was a mechanical one bit the bullet.

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[gert]

Put my top and doors on for the winterView attachment 86925

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Lol your shop is on my life goals list


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[gert]

I keep saying that to the one old guy at work who's been ready to retire since before I started there. It's always next January is it then it's June then it's next June and so on. I keep telling him if you're not careful you will end up like my neighbor. always saying this season is it. Well last summer he just dropped dead in the middle of the field one night. I will not be that way I swear.

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Man have the guys i work with are over 65, one of keeps saying if they piss me off one more time im retiring, and each time my response has been do you want me to get your cake ready?


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[Manic Mechanic]

Lol your shop is on my life goals list


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That's just my garage in the backyard. 1100 SQ ft 12' ceilings heat and AC 10' doors (for lifted vehicles)

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[Manic Mechanic]

It might have a lift or two

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[CJ]

It might have a lift or two View attachment 100322

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Man, I haven't seen a single post lift in while. Most have been replaced because of seal maintenance issues.

 

[Manic Mechanic]

I'm on the fence about replacing mine. Love it for certain work but maintaince is an issue cause everything is under 6" of reinforce concrete

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[CJ]

I'm on the fence about replacing mine. Love it for certain work but maintaince is an issue cause everything is under 6" of reinforce concrete

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Yea, once the hydraulics start to seap it can be costly.