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Re: What model Onan was the 4.0 for the GMC ? [message #367669 is a reply to message #367666] Mon, 22 November 2021 09:59 Go to previous messageGo to previous message
Matt Colie is currently offline  Matt Colie   United States
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hertfordnc wrote on Mon, 22 November 2021 10:13
If i am not mistaken, the Onan's were made just for the GMC but they were an existing product with a lowered intake manifold and different cladding.
Dave,

As nearly as I know, they were Power Drawers model 4.0 BF or 6.0 NH. and there were some other numbers, but Power Drawer was the dig change. Both the BF and the NH engines existed prior to and subsequent to the Power Drawer models. Onan did sell Power Drawers to other builders in addition to GM.

An important change in both PD models was the fuel pump and some times the fuel solenoid valve. Many of these engines were set up for gravity feed only.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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