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Ford Ranger 4.0 Liter Upper Rad Hose Collapsing


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#46 MH81 ONLINE  

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Posted November 27, 2014 - 07:59 PM

Man, that has to be one of the weirdest cause/symptoms I've seen in a long time.
Thanks for the follow up.
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#47 toppop52 OFFLINE  

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Posted November 27, 2014 - 10:23 PM

It's not weird, it's exactly what I expected from the beginning. The only way to get vacuum where there should be pressure, is a vacuum leak. That's why I kept referring back to the gaskets at the intake and head. We see it several times a year. Glad you found it and it wasn't too bad.


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#48 toomanytoys84 ONLINE  

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Posted November 27, 2014 - 10:29 PM

I see the problem and the reasoning. Personally I have never had an intake gasket fail without losing antifreeze or seeing tons of steam out of the exhaust.

my ex wife had a mid 90s Monte Carlo with a 3.4 v6. It blew 3 intake manifold gaskets in a short time. Always loss of antifreeze and steaming out the exhaust like crazy.
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#49 toppop52 OFFLINE  

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Posted November 28, 2014 - 12:08 PM

He had to be losing coolant, that's why the gaskets looked like they did with all the crud around the edges of the intake. But you can have a very small leak and it will still set up a vacuum that will eventually collapse the hose. The 3.4/3.1 is another known intake/intake gasket failure prone motor, as is the 3.8 GM and the 4.2 and 4.6 Ford. Depends on the year and application.


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#50 toomanytoys84 ONLINE  

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Posted November 28, 2014 - 01:02 PM

The 3.4/3.1 is another.....

I got very good at changing that gasket out. I changed the 3rd one and we sold it before there was a 4th! I got so tired of it every year. I could tell as soon as she started the car and took off. It would look like a smoke grenade was set off behind the car.

GM quality right there.

I had a 3.1 in a buick regal. Never a hiccup and had a 3.8 SS in a Rivera. Never a problem. But that 3.4 was junk.

Edited by toomanytoys84, November 28, 2014 - 01:03 PM.

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#51 toppop52 OFFLINE  

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Posted November 29, 2014 - 10:52 AM

If you had replaced the intake with an aftermarket like Dorman, it would have cured it.


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#52 dodge trucker ONLINE  

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Posted November 29, 2014 - 11:48 AM

If you had replaced the intake with an aftermarket like Dorman, it would have cured it.

and someone said something of the switch of auto parts to Chinese sourced...  no it would not have solved it/ at least not long term


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#53 toppop52 OFFLINE  

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Posted November 30, 2014 - 10:10 AM

and someone said something of the switch of auto parts to Chinese sourced...  no it would not have solved it/ at least not long term

In our shop, we have replaced a few dozen intakes on various engines, some with factory updated units, some with aftermarket, never, ever had a return, some as far back as the late 90's, that seems like a fix to me. But hey, I'm just a service manager with 44 years in the business.  By the way, a lot of the GM 60° V6 engines are built entirely in China.


Edited by toppop52, November 30, 2014 - 10:16 AM.

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#54 toomanytoys84 ONLINE  

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Posted November 30, 2014 - 01:59 PM

In our shop, we have replaced a few dozen intakes on various engines, some with factory updated units, some with aftermarket, never, ever had a return, some as far back as the late 90's, that seems like a fix to me. But hey, I'm just a service manager with 44 years in the business.  By the way, a lot of the GM 60° V6 engines are built entirely in China.

It honestly never occurred to me to change the whole manifold.  cost 45 bucks for me to fix and a few hours.

 

The first time I took it to a gm garage to fix it they said 900 for the repair. I took it home.


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#55 DougT ONLINE  

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Posted November 30, 2014 - 02:07 PM

I don't think I've ever seen a Dorman intake for the 3.4 engine. My experience has been that the problems started happening when they went to the plastic gaskets with the rubber lip. I'm a firm believer in the Fel-Pro "no leak" sets for these engines that use the steel with the heavy rubber attached. Never had a come back on one of those and I've even re-used them a couple times when necessary. Of course that set is in the 100 dollar range compared to 40 for the plastic ones.


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#56 toppop52 OFFLINE  

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Posted December 01, 2014 - 08:35 AM

It honestly never occurred to me to change the whole manifold.  cost 45 bucks for me to fix and a few hours.

 

The first time I took it to a gm garage to fix it they said 900 for the repair. I took it home.

I was actually answering the person that had fixed theirs several times, if I didn't have the experience I do, I'd assume that replacing the gaskets would be a permanent fix, and sometimes it is. I never use anything but Fel Pro Perma Dri gaskets. Near zero failure rate with them.

And just as a reference, here is a link to a Dorman 3.4 intake manifold...http://www.ebay.com/...8f0f38f&vxp=mtr



#57 toppop52 OFFLINE  

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Posted December 01, 2014 - 08:38 AM

To be fair, far more of the plastic intakes fail, than do aluminum, but the 3.4 is one known to have problems with the aluminum intake.



#58 TAHOE OFFLINE  

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Posted December 01, 2014 - 10:17 AM

 as is the 3.8 GM ...

At 135K on the Fireturd's 3.8 and no issues with intake. Now the pan gasket though..... :wallbanging:  

I knew I should've changed it before I did the engine swap, but was in a rush



#59 Alc ONLINE  

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Posted December 02, 2014 - 06:34 AM

Wouldn't the radiator cap open under vacuum when the upper hose was collapsing ?  Pulling what was in the overflow tank ?

 

 

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#60 AfterShock95 OFFLINE  

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Posted December 02, 2014 - 07:01 AM

Wouldn't the radiator cap open under vacuum when the upper hose was collapsing ? Pulling what was in the overflow tank ?

My 98 ranger with a 4.0 did the samething after I bought it it was the over flow line got pinched under the air box and couldn't suck anything back in to the raditor
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