Looking for a 409 engine bonnet-compatibility?

[dwomby]

Originally Posted by DODD

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Additionally, Roger noted in the same thread that when he fitted the SLJ swept exhausts system, a small aperture maybe/was required in the wheel arch. I imagine that this aperture would also help disperse some of the heat buildup from under the bonnet. This is something I will seriously consider doing on my 410 this autumn; if anyone else has created vents in a similar position, I would be interested in their views.

Brian

Thanks, Brian. I have been wondering about the possible benefit of venting into the wheel arches to let hot air out of the engine compartment. I hope to investigate the possibility when I get my 408 back on the road (hopefully in a month or two ).

David

[AndrewA]

Roger/Brian, I'd forgotten about the carbon under the metal plate and the bimetallic coil/ flap - when I took the top end of engine apart my inlet manifold was cracked and even the second hand one I got from SLJ had a lot of carbon under that plate. It took 6 cans of Mr Muscle aerosol oven cleaner, a powerful jet washer, assorted tooth brushes and bottle brushes to get it all clean again!
Logic would say it's all related, creating a hot spot under the carb.