Help with lower intake manifold/plenum
Thread Starter
|
New User
Joined: Jan 2008
Posts: 18
Likes: 0
Help with lower intake manifold/plenum
Just removed the intake manifold on my f-250 SD 5.4 Triton. I was surprised to find a plastic insulator shield around the lower plenum that attaches to the bottom of the aluminum intake manifold. The plastic is brittle and some of it has cracked off. The truck has 200,000 miles. What is the purpose of this plastic part and do I need to replace it? It's still intact for the most part. The aluminum box (lower intake) looks okay.
Cross-Country
Joined: Apr 2007
Posts: 51
Likes: 0
From: Öland - Sweden
Hi,
I had exactly the same question (see my post "engine misfires, cuts out" further down the list), the insulator shield in my van (2001 4.6) had gone into "a thousand pieces". I talked to an FMC engine engineer, he thought that the cover is there for NVH-reasons (Noise, Vibration, Harshness), but wanted to verify the information. As soon as I have received his answer I will post it here.
Regards
Ekkehard
I had exactly the same question (see my post "engine misfires, cuts out" further down the list), the insulator shield in my van (2001 4.6) had gone into "a thousand pieces". I talked to an FMC engine engineer, he thought that the cover is there for NVH-reasons (Noise, Vibration, Harshness), but wanted to verify the information. As soon as I have received his answer I will post it here.
Regards
Ekkehard
Thread
Thread Starter
Forum
Replies
Last Post
