Slight coolant leak
#12
01-09-2019, 08:35 PM
Your oil is leaking because of a plugged oil breather baggle, do the pcv mod and it will stop. It could be an intake coolant leak, but more likely hg as that is common. You can run it with the overflow bottle cap loosened 1/2 to 1 turn, just enough so the system will not build pressure, that will slow down your leak considerably.
#13
01-09-2019, 08:48 PM
Super Moderator
I am the guy that came up with the use of the FV308 PCV onto a Bosch 4.0L/4.6L D2 or P38.
All you do is purchase the FV308 off of Rock Auto or Ebay, or have your local auto parts store order one. To do the install you remove the black plastic nipple on the intake mounted on the passenger side by the hard line that runs to the Brake Booster. You then thread the FV308 into place vs the black plastic nipple and re-attach the hose. Now depending on the year D2 you have two ways of gaining access to the baffle mounted inside the valve cover. On 99-02 4.0L engines you simply remove the breather hose from the valve cover, and you will see the black plastic baffle. Take some carb cleaner and spray into it to loosen it up. Then using some needle nose pull it up slowly and remove it, then just re-install the breather hose. On 03-04 4.6L you have to gently remove the nipple on the valve cover, yank out the baffle, and then re-install the nipple onto the valve cover.
You will fix two weak links in the LR V8 Breather setup and it shouldn't cost you more than 10.00 depending on where you obtain your FV308 PCV.
All you do is purchase the FV308 off of Rock Auto or Ebay, or have your local auto parts store order one. To do the install you remove the black plastic nipple on the intake mounted on the passenger side by the hard line that runs to the Brake Booster. You then thread the FV308 into place vs the black plastic nipple and re-attach the hose. Now depending on the year D2 you have two ways of gaining access to the baffle mounted inside the valve cover. On 99-02 4.0L engines you simply remove the breather hose from the valve cover, and you will see the black plastic baffle. Take some carb cleaner and spray into it to loosen it up. Then using some needle nose pull it up slowly and remove it, then just re-install the breather hose. On 03-04 4.6L you have to gently remove the nipple on the valve cover, yank out the baffle, and then re-install the nipple onto the valve cover.
You will fix two weak links in the LR V8 Breather setup and it shouldn't cost you more than 10.00 depending on where you obtain your FV308 PCV.
#14
01-09-2019, 08:49 PM
I don't call it a mod I call it an upgrade. OEM plastic baffle isn't all that great, and it will normally break into bits if you try to take it out to clean it. Other side of that hose = the plastic 1/4 Thread nipple and once again they can snap clean off. Installing the FV308 eliminates two well known weak spots. It's not a mod as much as an improved setup. If you ever have to clean the FV308 you simply just un-thread it, spray it with some carb cleaner and re-install.
I've found the FV308 isn't usually stocked at a lot of auto part stores and I know why = no need to replace them usually as you just clean it and re-install it. Nothing really breaks on them (gotta love Honda's). However you can get them very cheap off of Ebay.
I've found the FV308 isn't usually stocked at a lot of auto part stores and I know why = no need to replace them usually as you just clean it and re-install it. Nothing really breaks on them (gotta love Honda's). However you can get them very cheap off of Ebay.
#15
01-09-2019, 08:57 PM
Super Moderator
#17
01-09-2019, 09:32 PM
FWIW guys, I have not seen any coolant on the floor since I posted this. Weird that it was after it had set for about 5 days during our vacation. But Ive put another 300 miles on it. Still runs the same temps, still get a coolant smell from the vents but I only get a very, very slight hint of coolant smell when I open the hood. I haven’t felt behind the heads yet, but I’ll get to that this weekend. I’m going to keep looking as it obviously came from somewhere! 
Last edited by Daytoman; 01-09-2019 at 09:34 PM.
