Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Reply
 
Thread Tools Search this Thread

  #1  
Old 02-06-2011, 06:41 AM
cougar9150 cougar9150 is offline
Learning to use the forums
 
Join Date: Feb 2011
Posts: 12
Default Rebuild advice/ blown head gasket

Sorry for any newbie questions I ask but wanted some help with a rebuild. If y'all could point me to some thread or give a few key points to look out for it would be greatly appreciated

I just bought a very well used Mazda B4000 with the 4.0l OHV V6 in it. Bought it for $1200 with the intention of cleaning it up and making it my daily driver. Odometer say 253k but I'm not sure how much of that was on this engine.

I pulled the motor yesterday and am going to tear it down over the next couple of days. It definitely gas a blown head gasket as there was oil in the coolant and coolant in the oil. Hoping it will be a matter or replacing gaskets and am hoping I don't have the crack between the intake and exhaust valves.

Thanks up front for your assistance.
Reply With Quote
  #2  
Old 02-06-2011, 06:50 AM
STL STL is offline
...............

 
Join Date: May 2009
Posts: 23,398
Default Re: Rebuild advice/ blown head gasket

You will wanna verify the head is not warped as well.

A simple way to find cracks if you have a black light you can buy dyes that you pour on the head. Then take the light and run it over the head.
__________________
2005 Edge

Reply With Quote
  #3  
Old 02-06-2011, 01:13 PM
cougar9150 cougar9150 is offline
Learning to use the forums
 
Join Date: Feb 2011
Posts: 12
Default Re: Rebuild advice/ blown head gasket

Quote:
Originally Posted by STL View Post
You will wanna verify the head is not warped as well.

A simple way to find cracks if you have a black light you can buy dyes that you pour on the head. Then take the light and run it over the head.
Will do, already fished out my feeler gauge and 18" straight edge to check flatness.

Is the UV dye made by the same people who make the dyes for coolant and oil leak detection? I have seen those at my local flaps but will need to look for the stuff you talking about.

I spoke with a guy over at Clearwater Cylinder Head and he said they won't even rework the factory heads because of the casting issues. Told me that an aftermarket casting fully built would run me $200 a piece.

Anything special I need to worry about on the bottom end? While the heads are off I'm going to inspect the lower end and see if everything is still in order. Figuring since I'll be this far in I may as well pop a couple bearing and connecting rod caps and see what it all looks like and make sure it's good before replacing the heads. May just get new bearings and rings to freshen the whole thing up. while the engine is out if there is no scarring on the crankshaft or main bearing journals.

Any other tribal knowledge you guys have would be greatly appreciated.
Reply With Quote
  #4  
Old 02-06-2011, 01:28 PM
terryduanemiller terryduanemiller is offline
www.shanewootenband.com
 
Join Date: Oct 2010
Posts: 1,896
Default Re: Rebuild advice/ blown head gasket

if it was me phil, since you have the block out, I wld redo all that I cld while it was apart.. I would also replace the cam syncro while it was apart.
__________________
MY BUILD THREAD
1999 MAZDA 2500SE, 2.5L 4-clanger, 5 speed, Green n slow. Rangers as daily drivers since 1988.
ASE Certified Mechanic, Builder of Show Destroying Protouring and Classic cars..
Reply With Quote
  #5  
Old 02-09-2011, 08:30 AM
cougar9150 cougar9150 is offline
Learning to use the forums
 
Join Date: Feb 2011
Posts: 12
Default

Pulled the heads off and they are definitely toasted. Top of the pistons look normal and cylinder walls are in decent shape except for a couple minor scratches in one. Looks like I could clean it up with a light honing.

Going to check a couple bearings tonight and see what the crankshaft journals look like.

May have to go cheap to get it running for now and take my time with engine rebuild as my price list is starting to exceed my budget. Need to get various supporting parts like a starter, ignition stuff, motor mounts, couple sensors, thermostat housing, etc... so the list is getting longer than first expected.

Going to look at some used motors but am not 100% sure on the years I should look at. I'm assuming 95-2000 ohv but need to look around for a little more info.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
blown head gasket evan117 4.0 SOHC / 4.0 OHV Tech 2 12-06-2010 07:13 PM
Blown head gasket thinking of adding stroker kit Thunderstorm2_2002 4.0 SOHC / 4.0 OHV Tech 6 11-10-2010 03:12 PM
2.3L blown head gasket Yellow 95 4-Cylinder Tech 4 05-13-2010 03:00 PM
Blown head gasket repair RangerChad Vehicle Snapshots 0 02-28-2010 08:07 PM
Need help. blown head gasket? cracked block? sean3481 3.0 Vulcan Tech 9 05-19-2009 08:19 PM