How to ID a 78 Inline six

[Anonymous]

Hello,

How do I find out the actual size/displacement/HP from an Inline six from a 78 Fairmont?

Thanks.

Joe

 

[jwb68c]

quick reference is the starter, a 250 will have the starter below the oil pan and a 200 will be above the oil pan, but some later 200s are low mount also, another is the water pump 200s have three bolts and 250s have 4 bolts. so if you see a low mount starter in a 78 its probably a 250, but check the water pump to verify that. then if your really ambitious you could check the casting numbers on the starter side of the block. good luck, J.

 

[WhitePony]

According to the Falcon Handbook, they didn't start switching to the low mount 200 until midway through 79.

 

[jwb68c]

Just covering my arse there, in case someone went through all the trouble if the original had probs. J

 

[Anonymous]

water pump
200--has 3 bolts attaching it to block
250--has 4

 

[CZLN6]

Howdy Joe and All:

A '78 200 is rated at 82 hp @ 3600 rpm. It had an advertized compression ratio of 8:1.

A '78 200 is rated at 92 hp @ 2900 rpm. It had an advertized compression ratio of 8:1.

Being this engine is in a Fairmont I would believe it to be a 200 (aka 3.3). I am no aware of 250 engines being used in Fairmonts, but I try to never say never (and I just said it twice).

Adios, David

 

[Anonymous]

Thanks a lot.
Its a 3 bolt water pump.