By February 2, 2007 0 Comments Read More →

Jeep Wrangler Head Gasket Leak?


I have a 2000 Jeep Cherokee sport with the 4.0 six and and the four speed

auto. It has 91 000 km on it. I have recently inherited the vehicle from my

mother, although I have always made sure the maintenance has been done

properly at a reputable garage since it was new. It gets Quaker State

synthetic oil every 5 000 km or 3 000 miles (or three months) and only the

best of parts. However I have to fill the reservoir with coolant about once

a month. Water drips out of the exhaust pipe every time I start it as well.

Neither the garage nor I have found any coolant leaks under the car. Could

the coolant be getting into the engine? Maybe a a gasket? My mother only

drives it very short trips and lives in the city. I tried to get it out on

the highway as much as possible when she owned it. We live in Montreal where

the average temperature during our winter is well below freezing but we

always gave the Jeep a long warm up in the driveway. Also the temperature

from the dash gauge is always either just above (idling) or below (above 30

mph) the middle marker even with a new safety thermostate. Any suggestions

would be greatly apprecitated because I am planning on keeping this Jeep

literally forever since I grew up driving it and hate the new liberty and

Nitro (mopar or no car).

Thanks very much


P.S. How long ahould I expect the transmission to last before it goes?

Hey Tom,

I answered a very similar email a few days ago. Here is the link

Jeep Wrangler Head Gasket Leak

He emailed me back the other day and said that the mechanic still can not find an internal coolant leak after 3 pressure tests but they see chocolate milkshake looking stuff inside the valve cover when they took the oil filler cap off and ran their fingers on the inside top of the valve cover.

I suggested that he use the over the counter additive I mention on this page……it really works. HOWEVER you will NOT have freeze protection inside the radiator and engine because you have to drain out all the antifreeze in order for the additive to work properly.

If you can wait until the weather warms up that would be better, or if you can make sure to keep the vehicle inside at night so the radiator and block do not freeze and crack.

Here is more about the additive

Engine Block Sealer

I have seen transmissions fail at 30,000 miles and some last 200,000 without problems. Routine transmission services, not pulling a trailer or heavy load and not idling for long periods of time all help improve the life of a transmission.


Austin Davis

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