Engine 850: B5252S/2.4/10v: - Volvo 850 exhaust smell in the passenger compartment

nedqlkow · Jul 7th, 2023, 11:33

Hello,
First of all, the basic information. Тhe car is a Volvo 850 (LS) 2.5 10V (140 hp.) non turbo with automatic transmission and installed LPG system.

For some time we have been struggling with a very annoying problem which, if not resolved, will result in the car becoming unusable even though it is still in drivable condition.
Therefore, I hope that your vast experience will help me in successfully solving this problem.

Some time ago, maybe over 6 months ago, an odor began to occur in the passenger compartment regardless of whether the air conditioner was running, whether the flaps were open or closed, whether the windows were down or up. At first it was noticeable but not that strong, but over time it progressed and now I would describe it as unbearable and making driving hell.
I would describe the smell as somewhere between an exhaust smell and a smell of burnt oil.

To fix the problem, we started with several steps as follows:
1. New fuel pump and hose inspection.
2. New exhaust manifold
3. PCV revision.
We did the test with the glove - https://www.veed.io/view/2bd752c6-ab...ue&panel=share
However, we decided to replace the flame trap just in case.
We plan to replace the oil trap as well as the attached hoses.

However, the problem remains. Could anyone give me any pointers on where to continue looking?

Barnoluk · Jul 7th, 2023, 23:21

Do you have any oil leaks or residue from old oil on the passenger side? If you’re in the uk the rear cam seals are famous for blowing out

nedqlkow · Jul 8th, 2023, 06:47

Quote:

Originally Posted by Barnoluk

Do you have any oil leaks or residue from old oil on the passenger side? If you’re in the uk the rear cam seals are famous for blowing out

No fluid accumulation was observed on the passenger side.
Bearing in mind that we are about to change the oil separator (breather box), I think we should also change the rear cam seals, since they are affordable.
The only thing that worries me is that they are not available in Bulgaria, where I live.

Jul 7th, 2023, 11:33	#1
nedqlkow New Member Last Online: Feb 12th, 2024 16:49 Join Date: May 2022 Location: Pravets	Volvo 850 exhaust smell in the passenger compartment Hello, First of all, the basic information. Тhe car is a Volvo 850 (LS) 2.5 10V (140 hp.) non turbo with automatic transmission and installed LPG system. For some time we have been struggling with a very annoying problem which, if not resolved, will result in the car becoming unusable even though it is still in drivable condition. Therefore, I hope that your vast experience will help me in successfully solving this problem. Some time ago, maybe over 6 months ago, an odor began to occur in the passenger compartment regardless of whether the air conditioner was running, whether the flaps were open or closed, whether the windows were down or up. At first it was noticeable but not that strong, but over time it progressed and now I would describe it as unbearable and making driving hell. I would describe the smell as somewhere between an exhaust smell and a smell of burnt oil. To fix the problem, we started with several steps as follows: 1. New fuel pump and hose inspection. 2. New exhaust manifold 3. PCV revision. We did the test with the glove - https://www.veed.io/view/2bd752c6-ab...ue&panel=share However, we decided to replace the flame trap just in case. We plan to replace the oil trap as well as the attached hoses. However, the problem remains. Could anyone give me any pointers on where to continue looking?

Jul 7th, 2023, 23:21	#2
Barnoluk Junior Member Last Online: Nov 17th, 2023 09:23 Join Date: Apr 2023 Location: Medway	Do you have any oil leaks or residue from old oil on the passenger side? If you’re in the uk the rear cam seals are famous for blowing out

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)