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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

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Old 11-14-2008, 01:12 PM   #1 (permalink)
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which thermostat? 6.2 or 6.5?

I have a goodwrench 6.5 that has all 6.2 accessories on it.

Do i ask for a 93 6.5 thermostat or an 86 6.2 thermostat?

It currently has a 180 thermostat which works fine, but i want the stock 190/195 as to heat my oil a little bettter in the winter.

SOLD!! sad but true Play 86 K10 SB w/ 6.5L turbo rollin on 39" x 18" M/T Bajas.... Twin tanks with extra 105g of WVO. Swapped to one ton axles. Vanity plates = EATFRYS

2014 GMC Sierra 2500 SLT quad shortie
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Old 11-14-2008, 02:39 PM   #2 (permalink)
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If you reused the 6.2 crossover/thermosat housing get one for 86 6.2. I believe the single thermostats are the same. Get a robertshaw.Gm is robertshaw. Others don't work properly on the 6.2-6.5s. I've used napa and the temp goes up and down,not steady as it should be. I use anarobic sealer and gasket. Silicone will leak.The part point sticky should have the part number.

92 k2500hd 6.5 4L80E std cab the work horse dieing slowly of frame cancer
4- 93 k2500hd 6.5 2-4L80E 2-NV4500 2-ex-cab 2 std
93 suburban gasser 4L60E Blown up-oil cooler lines 94 K2500HD 6.5td 4L80E new reman engine
94 K2500HD 6.5td NV4500 Std cab LB
2-94 K1500 Ex cab 6.5TD 4L80E 1-LB 1-SB
94 GMC Yukon 2 door gasser 94 k2500 Suburban 6.5td 4l80E
95 tahoe 2 dr 6.5 4L80E needs HG or engine
95 k2500LD 6.5 4L80E std cab bad trans AKA Money Pit
95 k2500hd 6.5 4L80E ex-cab
95 Yukon 2 dr gasser 4L60E blown engine-oil lines
2-95 K2500 Suburban 6.5TD 4L80E both need engines
97 k2500hd 6.5 4L80E std cab
97 k3500 C&C 6.5 4L80E std cab needs engine
98 k2500 hd 6.5 4L80E std cab bad trans

Last edited by bk95td; 11-14-2008 at 02:41 PM.
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