JustinGibson
Active Member
- Joined
- June 15, 2017
- Messages
- 76
- Reaction score
- 30
- City, State
- Jacksonville
- Year, Model & Trim Level
- 1994, Navajo
1986, Xr4ti
Hey all I've had an ongoing issue with my 1994 Navajo. Once it got to operating temp the gauge would bounce back and fourth from 1/4 to 3/4 and after a while I could smell burning coolant. I flushed the system three times, changed my thermostat, radiator, radiator cap, and temp sensor but problem remained the same. It always ran great with the only drive-ability issue being that it would have a rough idle on hot start I just assumed I needed to clean throttle body because it would go back to normal once I started driving. so I brought to mechanic for diagnosis. I believe he only conducted pressure test on cooling system because it ran great. He told me the water pump was leaking(really started after test) fan clutch was on its way out. I changed them myself but nothing changed. I was beginning to think that my gauge was faulty but I knew about some weaknesses in heads. I forgot to mention that the previous owner had the head gaskets changed and heads resurfaced which was 6 years ago and only about 10000 miles ago because it wasn't driven a lot which makes me wonder. In the last couple weeks maybe 1 out of every 20 starts I noticed a little white smoke on startups for only a second, it was more noticeable when it sat I think. I have had no visible coolant in oil but have had brown sludge in reservoir as well as a gasoline odor which should be gone considering the flushes I've done and the radiator change. The last drive I took it on it had bad misfire my entire drive (about 30 min in traffic) I ran out of gas as I was getting to school my gauge doesn't work and I knew I was pushing the miles I normally put on a tank. I got gas in it less than 20 minutes later and it fired right up but was bellowing white smoke. I parked it and called a tow truck and didn't start it back up till I pulled it up on the bed and off and it fired right up each time. The next day I tried to start it but it felt like the starter didn't have the power to crank it so I didn't try again. Upon inspection I could see coolant seeping around rear driver side spark plug. I pulled it and coolant drained out I immediately began tearing it apart to look further and assumed my heads were cracked and I could do a compression test by hand I used some penetrating grease on various bolts and I am not sure if I got it on the other plug but the plug next to it seemed wet as well but not on the same scale. I removed all the plugs and engine rotates by hand but I compression test by hand was impossible I could feel compression but I couldn't get a fast enough rotation on any cylinder to get gauge to read compression. I could hear a slight hissing sound which I read could just be cold rings. When I started taking the upper intake off I noticed some pooling of a black oily water substance which I know is not normal but don't know the cause. The upper intake had a nice new looking felpro gasket and I also got the valve covers off as well as taking off some possibly unnecessary junk to make my life easier. So my main questions are:
Is it odd that I am still not getting any visible coolant in oil even though on my last drive I lost a large amount of water? There was a very small amount of coolant on tow truck bed but it was dark so I could not find external leak.
Is this definitely a head/head gasket issue or is it possible the lower intake could be leaking into cylinder? My last truck had a GM 4.3 and I almost did heads but it was just the factory trash lower intake.
What are the possibilities that I have done major damage to the rods or other internal engine components and how would I know?
My first thought was buy new heads. Morana is very expensive, then there are king heads and slightly cheaper ProMaxx(Alabama?) should I just bite the bullet and order these before I get it torn down? Loaded or bare heads? I don't want to track down all the parts but also don't want to put trash heads on it.
Is there any other maintenance items I should try to replace while I'm in here without breaking the bank?
It is a 94 Navajo 5 speed 4WD with ~165k I bought it from the original owners son still in his parents name with all the maintenance records since 95 so I really wasn't expecting these issues. Sorry for the length and unnecessary details. Any advise could GREATLY appreciated.
Is it odd that I am still not getting any visible coolant in oil even though on my last drive I lost a large amount of water? There was a very small amount of coolant on tow truck bed but it was dark so I could not find external leak.
Is this definitely a head/head gasket issue or is it possible the lower intake could be leaking into cylinder? My last truck had a GM 4.3 and I almost did heads but it was just the factory trash lower intake.
What are the possibilities that I have done major damage to the rods or other internal engine components and how would I know?
My first thought was buy new heads. Morana is very expensive, then there are king heads and slightly cheaper ProMaxx(Alabama?) should I just bite the bullet and order these before I get it torn down? Loaded or bare heads? I don't want to track down all the parts but also don't want to put trash heads on it.
Is there any other maintenance items I should try to replace while I'm in here without breaking the bank?
It is a 94 Navajo 5 speed 4WD with ~165k I bought it from the original owners son still in his parents name with all the maintenance records since 95 so I really wasn't expecting these issues. Sorry for the length and unnecessary details. Any advise could GREATLY appreciated.