21-09-2017, 02:50 PM
I have recently started to experience fumes inside my RN box saloon for the first time since I purchased it ten years ago. They cause the eyes to sting and catch in the throat.
The fumes become apparent when the engine is hot and the driver is pressing on - ie, a steady 40 mph for half an hour or more.
I have checked the exhaust, and modified the valve cover plate by blocking off the 3 holes and fitting an extension pipe which extends below the chassis to carry away any by-pass fumes.
The fumes are still present, but seem less than before.
One thing that occurs to me is that they seemed to start becoming apparent when I fitted a 4-blade fan to try to overcome the effects of modern fuel vaporisation, causing the engine to splutter in hot weather when driving slowly or pausing at a junction etc. I wondered if the greatly increased air being forced over the engine by the new fan could be pushing fumes into the car via the various bulkhead orifices, many of which cannot be completely blocked up.
Has anyone else experienced this problem?
Thank you.
The fumes become apparent when the engine is hot and the driver is pressing on - ie, a steady 40 mph for half an hour or more.
I have checked the exhaust, and modified the valve cover plate by blocking off the 3 holes and fitting an extension pipe which extends below the chassis to carry away any by-pass fumes.
The fumes are still present, but seem less than before.
One thing that occurs to me is that they seemed to start becoming apparent when I fitted a 4-blade fan to try to overcome the effects of modern fuel vaporisation, causing the engine to splutter in hot weather when driving slowly or pausing at a junction etc. I wondered if the greatly increased air being forced over the engine by the new fan could be pushing fumes into the car via the various bulkhead orifices, many of which cannot be completely blocked up.
Has anyone else experienced this problem?
Thank you.