Question about 1988 Jeep Wrangler

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Radiator problem, I think?

1988 jeep wrangler. The coolant is bubbling over in the reserve container. Does this mean the radiotor is clogged somewhere?

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Not likely, but you can flush the entire system, and that would give you an indicator of the condition the engine is in internally. Smell the overflowing coolant, if it has a burned or exhaust like smell, you need to look at your engine gaskets.(Cyl Head gasket) especially. in a worse case scenerio, the heads themselves may need to be looked at. When you get a cracked head, you typically get a condition where the pressure the engine makes, pushes to coolant back through the system end up in the overflow bottle. I love jeeps, so good luck with this repair.

Posted on Aug 05, 2008

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When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

===

Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

===

MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

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Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

===

A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

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Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

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1 Answer

I replaced the cluth and slave cylinder in my 1988 yj wrangler. After bolting everything to gether i found out that the shifter will not move out of neutral. some one please help.


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Not enough heat coming out of the heater of 1988 2.5L Jeep Wrangl


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1 Answer

1988 jeep wrangler


If you are trying to solve an overheating problem this will not achieve anything, but if just to clean out dirty coolant this is how its done..
When engine is cold !!! with radiator in vehicle.
1/ Remove Top and bottom radiator hoses.
2/ Insert garden hose into bottom hose connection of radiator (Use a rag to help seal the connection) turn on water fully to reverse flush radiator till water comes out of top connection, repeat a couple of times.
3/ Reconnect hose to radiator , fill with clean water only.
4/ Run engine till it reaches normal temperature, then switch off engine and allow to cool.
5/ Remove bottom hose to drain system again, refit hose and refill with a good coolant mixture according to you climate.

Aug 05, 2008 | 1988 Jeep Wrangler

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