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And is there an engine number that shows the different power engines on the tls?
 

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all D port engines have numbers cast into the bottom of the inlet tract.

run your fingers under the throttle bodies and if there are numbers cast in the ali its a D port head.

early 97's had round ports and no cast in numbers
 

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Discussion Starter #4
OK, but what about differents in construction between these engines?
Are they basic the same engines but with different throttles, injectors, maps, airbox, exhaust system?
And I know that one has oil radiator.
What about gearbox?
 

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Discussion Starter #6
R's have forged pistons with higher compression, and different cams......IIRC
Early S's had 5 bolt clutches....all R's have 6 bolt.
Thanks mate. This is the answer what I want to heard.


I heard as well that engine case I R version was better for bearings but I'm not sure about this information.
 

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Early S models don't have the grooved journals that the later models and the R have.
 

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Thanks mate. This is the answer what I want to heard.


I heard as well that engine case I R version was better for bearings but I'm not sure about this information.
Yes, I think that you are right. There is something about the output shaft bearing. I don't recall exactly what. I think the diameter is different?
 

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