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Gas in my oil… still

trinogt

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Probably unrelated, just a bad luck streak. Yea they pushrods aren't very good at moving oil to the top end.
Are you sure its not just the infamous 4.0 tick? Mine ticks for a few mins when cold, then goes away for the day.
I started the truck every day to move it out of its cocoon and into the yard where I had room to work on it- Once in maybe 10 starts would it make the noise cold, but then it would clear up and idle smooth. Today as I drive it two blocks to get gas, it got noisy and never stopped 😞
 


dirtymike

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Been 2 days now, still acting up?
 

dirtymike

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Recon he Shot it, in self defense of course.
 

dirtymike

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Pulling heads? to replace lifters. Is that necessary on the 4.0. I can take the plenum off and access the lifter bay on my 2.9. Are the head gaskets blown? Ive seen worse rocker arm contact points. looks a little tight? Little lapping and good as new. I would look at cam/lifter contact surface for wear.
If you pull the heads, get them magna-fluxed!!
 

trinogt

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Pulling heads? to replace lifters. Is that necessary on the 4.0. I can take the plenum off and access the lifter bay on my 2.9. Are the head gaskets blown? Ive seen worse rocker arm contact points. looks a little tight? Little lapping and good as new. I would look at cam/lifter contact surface for wear.
If you pull the heads, get them magna-fluxed!!
Yup, the lifter bores are partially covered by the cylinder heads in the 4.0 ohv. I have one completely collapsed lifter, might as well replace all, along with head bolts, gaskets, rocker arms and push rods
 

dirtymike

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That changes things a bit. How many miles on the bottom end?
 

trinogt

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As far as I can tell, 133,000 miles. Compression test the other day came up with 175-185 all cylinders before the noise started.
 

Uncle Gump

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While this engine is down for repair... I would test and rebuild the original injectors. Or send them out to be done.
 

Eddo Rogue

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I would just rebuild the whole engine, for more power too.
 

trinogt

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While this engine is down for repair... I would test and rebuild the original injectors. Or send them out to be done.
Hmmm… I may actually still have the originals… good idea, I will look into that.
 

trinogt

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I would just rebuild the whole engine, for more power too.
I had thought about rebuilding- but for $2500, I can get a reman 4.0 with a 5 year warranty… decisions, decisions! Lol. Might have to just sell my B2500 (new rebuilt engine) since I don’t need the two trucks- I do like the utility of the extended cab of my B series(stereo), but the regular cab Ranger with Flareside bed just looks so good.
 

dirtymike

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133.000 aint bad. do the top end and see how she takes it. My 2.9 has had it done twice. Plenum has been off 3 time to clean injectors. Rebuilding injectors are a breeze. I still have the OEM injectors from 87'. I keep clean spares. As long as the coils still fire, its all cleaning and O-ring replacement.
 

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