Question about Jeep CJ7

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Temp gauge hook up late 70s cj7 258 6cylinder

I recently rebuilt a 258 engine for my 85 cj7. I used an earlier model engine for the rebuild. I think it is a 78 dont know for sure. the problem is that my engine temp wire hooked up on the top back drivers side of the head on all other jeeps except my late 70s engine. I need to know where the temp reading is on earlier model cj7

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  • 321 Answers

Wherever you can find a threaded port in the cooling system should work,as long as it is the same thread as your sending unit.If you cannot find a compatible threaded port,you may have to go to a hardware store and find some fittings that will adapt your sending unit to whatever threaded port is available.If you can not find one,most engine blocks have two (one on each side) threaded plugs for the water jacket.If you have to,locate the sending unit there with appropriate adapters.And as a last resort,you could purchase an aftermarket temp gauge and use it,as it comes with an assortment of adapters/fittings.

Posted on Jul 19, 2008

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Posted on Jan 02, 2017

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2 Answers

How do you read the temperature of engine. Thanks


There are several methods. You can use the dash gauge but it is not accurate. The other ways are to use an infrared thermometer, an OBD reader, or manual gauge in the coolant

Feb 06, 2017 | Cars & Trucks

Tip

Thinking about a rebuild


Now if you have determined that your engine is worn out, you must make some decisions. The question of whether or not an engine is worth rebuilding is largely a subjective matter and one of personal worth. Is the engine a popular one, or is it an obsolete model- Are parts available- Will it get acceptable gas mileage once it is rebuilt- Is the car it's being put into worth keeping- Would it be less expensive to buy a new engine, have your engine rebuilt by a pro, rebuild it yourself or buy a used engine from a salvage yard- Or would it be simpler and less expensive to buy another car- If you have considered all these matters, and have still decided to rebuild the engine, then it is time to decide how you will rebuild it.
The editors feel that most engine machining should be performed by a professional machine shop. Think of it as an assurance that the job has been done right the first time. There are many expensive and specialized tools required to perform such tasks as boring and honing an engine block or having a valve job done on a cylinder head. Even inspecting the parts requires expensive micrometers and gauges to properly measure wear and clearances. A machine shop can deliver to you clean, and ready to assemble parts, saving you time and aggravation. Your maximum savings will come from performing the removal, disassembly, assembly and installation of the engine and purchasing or renting only the tools required to perform these tasks.
A complete rebuild or overhaul of an engine involves replacing all of the moving parts (pistons, rods, crankshaft, camshaft, etc.) with new ones and machining the non-moving wearing surfaces of the block and heads. Unfortunately, this may not be cost effective. For instance, your crankshaft may have been damaged or worn, but it can be machined undersize for a minimal fee.
So although you can replace everything inside the engine, it is usually wiser to replace only those parts which are really needed, and, if possible, repair the more expensive ones. Later in this section, we will break the engine down into its two main components: the cylinder head and the engine block. We will discuss each component, and the recommended parts to replace during a rebuild on each.

on Mar 13, 2010 | Chevrolet Malibu Cars & Trucks

3 Answers

It ran out of oil and now it makes loud noises and only runs for 2 minutes. What engine parts might be damaged?


Any moving part relying on lubrication can be affected by lack of oil.

Sounds like the engine is FUBAR!

Apr 09, 2016 | 2001 BMW X5 3.0i

1 Answer

Temperature gauge quit where is the sensor and how do I check if its the sensor or the gauge?


you have to be specific in the tear ,make,model of the vehicle
some engines use a temp sender unit as well as a temp sensor unit
check around the outlet area of the head and if you find a small sender with one wire to it then remove the wire and place it on the head
turn on the ignition and if the gauge immedately goes to hot , turn of the ignition switch and replace that sender
some late model engines use a sensor for two purposes
1 to tell the ecm when to turn on the fans and
2 to have the ecm show the coolant temp on the gauge
if in doubt have an accredited auto electrician check it for you

Apr 22, 2015 | Cars & Trucks

1 Answer

My trucks temp gauge stays cold mostly unless in 4th-5th gear?


do you have a coolant thermostat fitted if not this can make your temp gauge unstable as the stat should not let water though until normal temp is achieved if this is all in order a water pressure test may be needed to check that the head gasket is not letting compression gasses into the water jacket

Nov 14, 2014 | Cars & Trucks

1 Answer

False temp reading


you will find that there is nouthing wrong all that is a bad reading due to a faulty body earth! seen it all before! just check your body earth points it will be one of those loose! or corroded!
think it's one underneeth the drivers side foot well plastic pannel I think? but it is definetly one of them stop worrying! you will find it easy now you know what it is!
Hope that helps (shuld do!)

Mar 10, 2010 | 2001 Mercury Cougar

1 Answer

1996 Cutlass Supreme-Temp shows hot even after engine rebuilt


is the temp gauge sender new
or the engine cooling fans spinning fast enough
air in the heating pipes ? bleeding

Feb 28, 2017 | 1996 Oldsmobile Cutlass Supreme Coupe

1 Answer

Vacuum lines for a 4a-c 1983-1986 SR5


You can get a carb./vacuumhose-setup printout at Toyota dealers...;)

Oct 03, 2008 | 1983 Toyota Corolla Deluxe

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