I have had this question for a long while and finally mastered enough courage to ask. It is kind of puzzling to me since I think my Gen 4.5 has many nice things missing from Gen 3. Let me put a short list here and welcome to point out why Gen 3 is better than Gen 4, especially Gen 4.5. Thanks a lot. I hope that I can find some scrap parts from Gen 3 in JY and retrofit them on my Gen 4.5. Then I shall have the complete package. Thanks.
Please ignore styling etc. That is subjective.
Places where Gen 4.5 > Gen 3
1. No distributor. Ignitor is much easier to deal with.
2. Fuel deliver is one way, no returning fuel.
3. Headlights are better.
4. Wheels are bigger, especially can be fitted with 16 inch wheels, better handling.
5. Larger dog bone engine mount.
6. Better window regulator setup. Less prone to fail and cheaper to replace.
7. Multi-layer steel head gasket > Composite head gasket.
Places where Gen 3 > Gen 4.5
1. Better paint?
2. Has an oil cooler (This can be retrofitted on Gen 4.5)
3. Available fog lights?
4. License plate holder
5. Metal thermostat housing (= Gen 4 > Gen 4.5 I have got one already. Will install next time messing with coolant.)
6. Less prone to sludge? (I use full synthetic oil. This is not an issue.)
7. Has cabin air filter. US-made gen 4 does not.
Difference
1. Gen 3 uses ODBI. Gen 4 uses ODB2.
2. Gen 4.5 (don't know about Gen 4) has no EGR temperature sensor. Gen 3 does.
Anything else? Thanks.
Please ignore styling etc. That is subjective.
Places where Gen 4.5 > Gen 3
1. No distributor. Ignitor is much easier to deal with.
2. Fuel deliver is one way, no returning fuel.
3. Headlights are better.
4. Wheels are bigger, especially can be fitted with 16 inch wheels, better handling.
5. Larger dog bone engine mount.
6. Better window regulator setup. Less prone to fail and cheaper to replace.
7. Multi-layer steel head gasket > Composite head gasket.
Places where Gen 3 > Gen 4.5
1. Better paint?
2. Has an oil cooler (This can be retrofitted on Gen 4.5)
3. Available fog lights?
4. License plate holder
5. Metal thermostat housing (= Gen 4 > Gen 4.5 I have got one already. Will install next time messing with coolant.)
6. Less prone to sludge? (I use full synthetic oil. This is not an issue.)
7. Has cabin air filter. US-made gen 4 does not.
Difference
1. Gen 3 uses ODBI. Gen 4 uses ODB2.
2. Gen 4.5 (don't know about Gen 4) has no EGR temperature sensor. Gen 3 does.
Anything else? Thanks.