6.2-6.5 car hauler questions

[wahl4m]

im looking at a 80s chevy car hauler w a 6,5 non turbo motor -any pros or conbs ? owner says it is a 6.6 -and they removed the turbo ? seems to run good ! did notice the fuel pump is a bolt on -side of lower block ?is that correct for thes 6.2 s or 6.5 motors ? it also requires glow plugs to be used regilarly ? but truck has nice hodges bed and tires /no rust /nice "pierce" elec.winch /17.5 ft bed non crew cab what should it be worth?

[special-K]

6.2s had mechanical fuel pumps on engine,like a gas motor and were used through '93. The 6.5TD came out in late-92 and only in regular cab heavy 2500,3500,and 3500HD. The non-turbo 6.5 took the place of the 6.2 till it was dropped after a couple years Those were mechanical injected with electric lift pumps and didn't change in '93. From 94-on all diesels are electronic injection. 6.6 would be a Duramax.

[wahl4m]

thanks for the info -this truck im looking at must be a 6.2 engine , because it has the manual fuel pump ,or is it just a lift pump to a mechanical pump ? is this pump dependable or can a electric be installed ? also w/ the fuel jellying up in cold weather is that a problem with the manual pump or even the problem of dirty fuel and filters ? the owner said they removed the turbo ?is that ok ? just lower on power ?

[special-K]

I think it's a 6.2. Is this a post-87 C/K model,or an R/V model (square body). There were never any turbo charged 6.2s. They bumped the naturally aspired 6.2 up to 6.5 when the 6.5 turbo came out. These are all the same motor with the 6.5s just being a larger bore. These trucks will run without a lift pump (fuel pump),but it's hard on the injector pump.The purpose is to bring the fuel up from the tank to the IP so all the IP has to do is pump fuel to the injectors. The lift pump primes the IP. The 6.5s with electric lift pump use a block-off plate at the mechanical lift pump location. So,you could use one of those and run an electric one. But,I've never had an issue with the 6.2 mechanical pump. I see no benefit since the pump doesn't actually run the engine and they aren't know to be problematic.
Fuel gelling is a fuel problem that effects any diesel when the fuel gets cold enough,no matter what motor or what the fuel system equipment it runs. Fuel additives help prevent gelling and so does a full tank. It's just like water freezing. The deeper and larger the basin,the longer it takes to freeze. It has to be damn cold for diesel to gel,like low teen for a while or single digits. I have seldom used additive,only a few times when temps were going to single digits...and I ran out that night and topped it off.
Dirty fuel is handled by the fuel filter. Fuel filters are very important players on a diesel fuel system.
No problem removing the turbo,since they are both the same engine. The turbo is good for 60 more hp. The 92/93 mechanical injected 6.5TDs use the same IP as the 6.2,the Stanadyne DB2. They're a very reliable pump