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Kidoo's avatar
Kidoo
Explorer
Jan 28, 2014

2008 Tiffin - Cummins 300 Is it a 6.7 or 5.9

I saw a Tiffin FRED 2008, 32BA and wonder if the engine is a Cummins 5.9 or a 6.7.

I know Cummins changed their engine in mid 2007 and supposedly the 5.9 was a a better engine than the 2007 plus year, better MPG, less electronic and more reliable, from the pick up truck familly anyway. Maybe not so in the newer 2013/14 years, but from 2007 to 2008 they use more fuel than the 2007 down, have less problems with fuel rails, electronics, ect.

I this true with the newer RV engines?

6 Replies

  • I think the FRED would keep a better price than a gazer, especially in the price range an size of a 32 Feet.

    A 2007 at PPL was offered at 59000 a few monty ago and they where letting it at around 52000.
  • I don't know if it is the same engine that is used in pick-up trucks. I know that when we were looking, I got the VIN from the motorhome we were interested in and called Freightliner. They were able to give me a great deal of information on the chassis and also the engine, including the engine serial number, model, HP, etc. I then called Cummins with the engine serial number and they were able to give me engine specific information. That is how I discovered the color difference between the 5.9 and the 6.7

    We have been very pleased with our Tiffin FRED. While you give up the air bag suspension and the air brakes, you have the advantages of a diesel, including torque and the exhaust brake.

    There is a Bosch brake recall on the FRED chassis that may or may not have been taken care of on the coach you are looking at. The FRED chassis uses a Bosch hydraulic brake system rather than air brakes found on most diesel pushers. The recall involves replacing the entire brake caliper assembly. In our case, they also replaced the pads. If is essentially the same recall that applied to the Workhorse chassis a couple of years ago.
  • Sounds like a good start, Black 5.9, Red 6.7. I asked a few FRED seller and most just do not know if it is a 5.9 or a 6.7.

    I wonder if it is the same engine in a pick up and in a Motorhome?
  • I also have a 2008 Tiffin Fred (38QDB). Some of the marketing material from Tiffin incorrectly lists the 300hp, 5.9L Cummins as the power for the Fred in 2008. Unless yours was built on an older chassis, it probably has the 340hp, 6.7L Cummins. There is a very easy way to confirm the engine installed in the coach in question. Simply look at the color of the engine. If it is black, it is the 300hp, 5.9L engine. If it is red, it is the 340hp, 6.7L engine. I confirmed this in a discussion with Cummins when I kept getting conflicting information between the Tiffin marketing material and the seller's representation about the engine.

    If the insulation on the engine cover area hasn't already been upgraded, it will make a big difference in sound and heat.

    Marty
  • If it's truly a 2008 model year it will be a 6.7 which is not a bad engine in any respect. I certainly would not avoid a unit because of it - just the opposite!