Go Back  DodgeForum.com > Dodge Trucks > Dodge Ram > 2nd Gen Ram Tech
Reload this Page >

End-all Be-all plenum thread

2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

End-all Be-all plenum thread

  #1051  
Old 05-01-2018, 11:11 AM
Talon0000
Talon0000 is offline
Registered User
Join Date: May 2018
Posts: 11
Exclamation Looking for some second opinions

First off, so sorry if this is not where I am supposed to post this I am new. Here is what I got though. I have very limited mechanical experience but like doing it so last semester I decided what the heck I am going to buy an old 1999 Ram V8 360 and rebuild the whole engine. So I did it and despite a leaky injector on the start up the thing actually started and ran. Awesome! But after 1,000 miles on my new engine I was 3 Qts. oil low. Vacuum test shows issue with the intake. I am assuming my plenum is the culprit as I have no oil leaks that would give off 3 qts of oil. I don't understand why it is leaking when I installed the hughes engine aluminum plate replacement, torque to speck and used lock tight. Next issue, it appears my passenger cylinder head is leaking a little oil at cylinder 8 which after reading the post at the top of this thread cylinder 8 spark plug gets oil fouled really fast do to the oil vapors. So here are my questions: Why would my plenum be leaking with the hughes aluminum plate replacement? Is 84 in-lbs just to little? or maybe did I over do the torque? Also, are the oil vapors being sucked into cylinder 8 and during compression being pushed out around the cylinder head gasket causing what looks like a small oil leak? What should I do to fix this issue? I was thinking getting the Hughes air-gap intake that does not have a plenum to fix the whole issue but do you think I need to replace the cylinder head gasket still? Opinions appreciated. I am new to all of this just picked it up from a Chilton's manual and my own intuition.
 
  #1052  
Old 07-06-2018, 10:21 AM
computersavvy
computersavvy is offline
Registered User
Join Date: Jun 2018
Posts: 7
Default

Originally Posted by HeyYou View Post
No pressurized oil flows thru the head gasket either.......
I realize this is long after your original post, but on many engines pressurized oil does go thru the head and head gaskets.
IE. overhead cam engines.
The magnum does not, but many do.
 
  #1053  
Old 07-06-2018, 04:02 PM
HeyYou's Avatar
HeyYou
HeyYou is offline
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 56,176
Default

Originally Posted by computersavvy View Post
I realize this is long after your original post, but on many engines pressurized oil does go thru the head and head gaskets.
IE. overhead cam engines.
The magnum does not, but many do.
I am well aware of that, but, in this instance, it isn't the case.
 
  #1054  
Old 11-13-2018, 11:22 PM
aresf11's Avatar
aresf11
aresf11 is offline
Amateur
Join Date: Feb 2016
Posts: 31
Default

My buddy and I did our plenum gaskets this past weekend with Fel-Pro gaskets and an aluminum plate. The job wasn't too bad; just time-consuming. I found a nice quality aluminum plate on ebay for $50 (basically the same as the Hughes plate). I think we spend $110 in parts per truck. Only broke one intake manifold bolt between the two trucks.

His '92 was actually a lot harder than mine due to all of the extra vacuum lines under his hood. Oddly, it's a much more complicated situation under the hood than my '01.

They both run exactly the same; we'll see if oil consumption gets better.

A word of warning if your plate comes with replacement bolts; the ones that came with mine were shorter than OEM and with the added thickness of the plate, I didn't get enough "bite" into the intake and stripped out a couple threads before I realized what was happening. I ended up just re-using the OEM bolts.


I had previously read that the OEM bolts "bottom out" when used with the steel plate and don't properly compress the gasket. I can 100% confirm that to be true. Look how much space there is here, even with the bolt all the way in!




So dirty, I even found a worm in there! haha Amazingly, this little guy found his way in while the intake was setting on the grass.


BTW, no need to crack open the AC system; just unbolt the compressor and move it to the side.
 
  #1055  
Old 12-14-2018, 10:29 PM
Shadow_Death
Shadow_Death is offline
Professional
Join Date: Jun 2017
Posts: 129
Default

I'll add a little note here for any future readers. Be sure to clean or replace your charge temperature sensor when you replace the plenum plate. I finally did mine and it combined with replacing my defective Engine Temp Sensor fixed my idling and running issues. I didn't take any pictures but mine was coated with oil to the point where even the white plastic cage around the sensor was brown.
 
  #1056  
Old 01-09-2019, 08:58 PM
1974dodgeowner
1974dodgeowner is offline
Registered User
Join Date: Jan 2010
Location: kansas
Posts: 9
Default

Started this project last weekend. It’s all like opening a barrel of monkeys on my old truck lol. I had a water leak at the front of intake. Has leaked for a few months. As far as I can tell the plenum wasn’t leaking. Over 300k miles and all I’ve done is change oil, tires, brakes, fuel pumps and water pumps. Still had original dizzy cap, rotor and ignition wires! So I’m doing the whole work up. Timing chain plugs wires cap rotor. New exhaust. I figure I would rather spend 5 thousand on this truck, instead of buying someone else’s worn out vehicle for ten grand.
 
  #1057  
Old 01-09-2019, 09:47 PM
HeyYou's Avatar
HeyYou
HeyYou is offline
Super Moderator
Join Date: Apr 2010
Location: Clayton MI
Posts: 56,176
Default

Originally Posted by 1974dodgeowner View Post
Started this project last weekend. Itís all like opening a barrel of monkeys on my old truck lol. I had a water leak at the front of intake. Has leaked for a few months. As far as I can tell the plenum wasnít leaking. Over 300k miles and all Iíve done is change oil, tires, brakes, fuel pumps and water pumps. Still had original dizzy cap, rotor and ignition wires! So Iím doing the whole work up. Timing chain plugs wires cap rotor. New exhaust. I figure I would rather spend 5 thousand on this truck, instead of buying someone elseís worn out vehicle for ten grand.
That is a VERY valid point. And one of the main reasons I buy the vehicles I do. My last one, that I paid 1500 bucks for, and put maybe a grand into, lasted me 7 years. I would probably still be driving it if my current truck hadn't popped up at the right price.
 

Thread Tools
Search this Thread
Quick Reply: End-all Be-all plenum thread


Featured Sponsors

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: