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oil pans
- Thread starter bug_sixty
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Trevor Jessie
Yoda
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It was discussed on the spridgets list. IIRC there are three variations.
Hap Waldrop
Yoda
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Billm said:
Thats right, they do not interchange.
Spridget64SC
Jedi Trainee
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For the Small Bore In-Line Engines (948/1098):
All pans are interchangable when using stock connecting rods. The long side oil pan gasket surfaces have a little different shape between the 948 & 1098 due to the shape of the 1098 block. The bearing cap contours (where the cork or rubber gasket strip sits) are the same from pan to pan whether a 1.75" engine or a 2.00" 1098 engine.
When using aftermarket rods, especially the Carillo rod, the 1098 stroke comes into play and interferences are sometime encountered with the 948 oil pan on the long side of the block. Then the 1098 oil pan has to be used because it has a bit narrower oil pan gasket flange in that area. Not an issue on the 948 because the stroke is nearly 0.300" shorter. Also, the Carillo rods are horizontially split rather than at an angle and the size and shape of the big end is different. All factors that cause the interference with the longer stroke.
For the Large Bore 1275 In-Line Engine:
The 948/1098 pans don't fit because the rear main bearing cap has a wider contour or curve. The front main bearing cap will fit the 948/1098 oil pan, but the rear will not. Only 1275 oil pans will fit. That's why a 1275 oil pan gasket set has one longer cork gasket strip for the rear.
This doesn't meant that one cannot modify a 948/1098 pan to work using the rear part of a blown up 1275 oil pan, but it is not worth it to most individuals.
Small bore flat oil pan gaskets can be used on 1275 with a little clipping of the excess material at the rear main. But 1275 flat gaskets are too short for the small bore rear mains. And, likewise the small bore corks only work on the front of the 1275, but the 1275's will fit the small bore stuff with a little trimming on the long strip.
That's all I know about oil pans, HTH,
Mike Miller
All pans are interchangable when using stock connecting rods. The long side oil pan gasket surfaces have a little different shape between the 948 & 1098 due to the shape of the 1098 block. The bearing cap contours (where the cork or rubber gasket strip sits) are the same from pan to pan whether a 1.75" engine or a 2.00" 1098 engine.
When using aftermarket rods, especially the Carillo rod, the 1098 stroke comes into play and interferences are sometime encountered with the 948 oil pan on the long side of the block. Then the 1098 oil pan has to be used because it has a bit narrower oil pan gasket flange in that area. Not an issue on the 948 because the stroke is nearly 0.300" shorter. Also, the Carillo rods are horizontially split rather than at an angle and the size and shape of the big end is different. All factors that cause the interference with the longer stroke.
For the Large Bore 1275 In-Line Engine:
The 948/1098 pans don't fit because the rear main bearing cap has a wider contour or curve. The front main bearing cap will fit the 948/1098 oil pan, but the rear will not. Only 1275 oil pans will fit. That's why a 1275 oil pan gasket set has one longer cork gasket strip for the rear.
This doesn't meant that one cannot modify a 948/1098 pan to work using the rear part of a blown up 1275 oil pan, but it is not worth it to most individuals.
Small bore flat oil pan gaskets can be used on 1275 with a little clipping of the excess material at the rear main. But 1275 flat gaskets are too short for the small bore rear mains. And, likewise the small bore corks only work on the front of the 1275, but the 1275's will fit the small bore stuff with a little trimming on the long strip.
That's all I know about oil pans, HTH,
Mike Miller
