I'm dumb, what is this coolant leak?

[Michael Goettl]

So, I noticed this at the end of last year, in MN, and didn't feel like messing around with it going into winter. This white hose under the intake manifold is leaking coolant. I have had the intake off several times previously and do not recall where this would be going, I also do not see it in the shop manual. What is this thing? Assuming I just need to pull the intake and connect it to something? 1998, it's on passenger side, would be above cylinder 2.

 

[GTS Dean]

T-stat housing gasket, or the heater flow hose off the top of the housing. At a minimum, the intake has to be lifted and propped up at the front for either one. The intake assembly weighs over 30#. If you want to take it off, then pull the fuel pump relay in the trunk while idling and let the engine run til it stalls before accessing the fuel line quick connector. Gaskets are still available at the dealer and pretty inexpensive. And FYI - the '98+ cars DO NOT have a PCV valve.

 

[serafins]

Hey Dean what do you mean by no PCV valve?

 

[GTS Dean]

The photo shows a PCV valve that is not correct for '98+. They all went to a drilled orifice in the tee to the throttle bodies.

 

[Michael Goettl]

T-stat housing gasket, or the heater flow hose off the top of the housing. At a minimum, the intake has to be lifted and propped up at the front for either one. The intake assembly weighs over 30#. If you want to take it off, then pull the fuel pump relay in the trunk while idling and let the engine run til it stalls before accessing the fuel line quick connector. Gaskets are still available at the dealer and pretty inexpensive. And FYI - the '98+ cars DO NOT have a PCV valve.

I have some gaskets i bought a few extra a while back. Im not worried about pulling it. Pretty easy. I just didn't see it in the service manual schematic. Thanks!

 

[Michael Goettl]

The photo shows a PCV valve that is not correct for '98+. They all went to a drilled orifice in the tee to the throttle bodies.

Ill pull the intake and grab some pics. For some reason and this might sound crazy. But some of the parts on my car dont exactly match the service manual. I have the official Mopar. I could have swore I read some 98s had it. But I could be getting mixed up with the ccv. Ill pull the intake and grab some pics.

 

[Michael Goettl]

Couple extra pics. Ill pull the intake tomorrow night.

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[Michael Goettl]

Edit. Of course you. nailed it and im dumb. The leak is coming out of the tstat housing

I was going through a divorce and was out of my house and away from the car for a year+ and just noticed this. Compared to your pic, it looks like I have a valve there because it's definitely not the same. Could that cause any damage? It's been that way for a while, I recall doing something with that part, but again it's been a while. Also, when I was getting it tuned after headers and new exhaust they were having trouble because the A/F kept saying rich on the passenger side, not sure if that would have cause it.

Either way, seems like I need a different part there?

Ill pull it tomorrow night and get a pic of what's in there. I just ordered this, which appears to be the mopar part (3671076) equivalent. https://www.rockauto.com/en/moreinfo.php?pk=937259&cc=1384747&pt=5052

Edit. Alright, it would have kept me up to not just take the 45 mins and pop it out. This is what was there. I know I didn't do this, but it's not a PCV. Someone put a different fitting in, but either way it's not a valve. What is weird is someone clearly ordered a hose to attach to it this way rather than the right angle CCV part. Should I be checking any part numbers to see if there is something not right with my crankcase, possible engine swap? After I purchased the car, I got paper work from the shop that originally tuned it along with some other stuff they did, but the story was a guy blew past the limiter and did a bunch of damage. I still have the invoice, but it didn't indicate they swapped the entire engine. Adding invoice, this was from 2011. Either way, that hose was clearly to attach to a PCV. I've since got rid of the electronic cuttouts, went with long tubes and 4 inch exhaust, had the heads redone at nth moto in MN, and put the stock airbox on in place of the k&N.

But the leak is for sure the tstat gasket. So I will swap that.

 

[GTS Dean]

The 96-97 setup is an S-shaped hose running from a nip ple in the PCV grommet and up to the standard PCV valve under the throttle shaft. From there, it goes to the tee feeding behind the TB's. The valve contains a spring-damped tapered pintle valve to vary the blowby flow back to the intake.

The 98+ cars have a longer S-hose from the nip ple that goes directly to the tee. As you can see in these photos, there is a small freeze plug with a drilled orifice pressed in to limit the crankcase gasses instead of the poppet valve.

From the outside the tees appear identical, but early units are 3/8" inlet, while the latter ones are 1/2" inlets.

The Gen 3 valve covers have a full-flow inlet nip ple on one side connected to the intake boot, while the opposite side has an orifice restrictor pushed inside for feeding the intake plenum.

 

[Michael Goettl]

Awesome. Thank you for that info. Should I put this in instead. What ever fitting is in mine looks like a hose coupler. There is nothing in it.

 

[GTS Dean]

You have what appears to be the correct valve. The housing configuration varies by hose size and routing. The working guts vary by specific engine size and performance level. I believe the 8.0 Viper uses the same HP valve as on the big block Magnums and Hemis from 68-71. It is possible that they used a more emissions-tuned valve from the lower compression big blocks of the early-mid 70's to control hydrocarbon emissions on the Viper.

Here is an example of Chevy Corvette PCV's used over time. Interesting reading:

 

[Michael Goettl]

Awesome, thanks again!

 

[Michael Goettl]

This what was on my car, now I am more confused? Assuming I don't need that value at all? https://www.factorychryslerparts.com/products/HOSE-PCV-Inlet/4299431/04848340AC.html

I do not have the following which is what the valve looks like it's for. I have the tee that goes to the throttle bodies.

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[GTS Dean]

That photo is of a '94-'96.5 Gen 1 wet sleeve engine. PCV in the passenger valve cover. Clean air inlet in the driver's cover. The link you posted shows the nip ple and hose from the Gen 2 block port.