• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

98 4.0 overheated, headgasket time


TAMUmpower

New Member
Joined
Aug 12, 2015
Messages
2
Reaction score
0
Points
1
Vehicle Year
1998
Make / Model
Mazda
Transmission
Automatic
So my beater 1998 B4000 looks like the thermostat got stuck shut and overheated a bit on a 15min drive. The steam pressure blew the heater control valve. No idea how to describe how bad or not bad it overheated but the previous head gasket that already drank a little coolant now makes hissing sounds from the compression so it's really blown. No water in the oil though. Vibrates a lot from I'm assuming a large amount of water enting the combustion chamber now. The truck has 250k miles and I was already going to sell it this year.

I've replaced head gaskets on other vehicles before. My real question is are there any specific tools I need to re time the cam or am I good to dig in with my normal tools. The little I've read is the heads are known to crack. Well I guess I'll look first. If thats the case then probably will just sell it as is. Thanks
 
Last edited:


Dirtman

Former Middleweight Moss Fighting Champion
Joined
May 28, 2018
Messages
19,304
Reaction score
13,326
Points
113
Location
41N 75W
Vehicle Year
2009
Engine Type
2.3 (4 Cylinder)
Transmission
Automatic
2WD / 4WD
2WD
Total Lift
It's up there.
Total Drop
It's down there.
Tire Size
Round.
My credo
I poop in the furnace.
Is it the OHV or OHC engine? If its an OHC just sell it now... you need to pull the engine.

If its an OHV, no special tools required. And no need to even mess with the cam, or chain to service the heads. Stupid simple design.
 

TAMUmpower

New Member
Joined
Aug 12, 2015
Messages
2
Reaction score
0
Points
1
Vehicle Year
1998
Make / Model
Mazda
Transmission
Automatic
It's OHV. Never had to do a V6. Took the heads off a 4 cylinder before and a inline 6 bmw and those were super simple and great access. This 4.0 has a mountain of BS piled on top of the engine.
 

Dirtman

Former Middleweight Moss Fighting Champion
Joined
May 28, 2018
Messages
19,304
Reaction score
13,326
Points
113
Location
41N 75W
Vehicle Year
2009
Engine Type
2.3 (4 Cylinder)
Transmission
Automatic
2WD / 4WD
2WD
Total Lift
It's up there.
Total Drop
It's down there.
Tire Size
Round.
My credo
I poop in the furnace.
Yea, lots nonsense to remove but all fairly simple work. And no cams to worry about on the OHV engine. Very straightforward and only basic hand tools needed.
 

rumblecloud

Well-Known Member
Supporting Member
Joined
Mar 6, 2020
Messages
1,392
Reaction score
1,120
Points
113
Location
48022
Vehicle Year
1994
Make / Model
Ranger Splash
Engine Type
4.0 V6
Transmission
Automatic
2WD / 4WD
4WD
Total Lift
1-1/2 inch front leveling
Total Drop
Stock
Tire Size
31/10.50/15
My credo
What's the worst that could happen?
Just pulled the heads off my 4.0 OHV. As Dirtman said "Fairly simple work."
If I can do it, you surely can.
 

Sponsored Ad


Sponsored Ad

Staff online

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Shran
April Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top