S4 vs. S5 Engine Differences While In-car?
10-07-10, 09:41 PM
#1
S4 vs. S5 Engine Differences While In-car?
Hi all,
The engine I bought from Mazda came with a waterpump housing with the extra opening at the bottom (I assume for a return hose from somewhere) and the thermostat cover is aluminum and had the hole at the top. Is this for the turbo model or the S5?
If it is S5, I'd be curious to know if they shipped me an S5 engine so is there anyway to tell now that the engine is in the car? Just curious as always.
Charles
The engine I bought from Mazda came with a waterpump housing with the extra opening at the bottom (I assume for a return hose from somewhere) and the thermostat cover is aluminum and had the hole at the top. Is this for the turbo model or the S5?
If it is S5, I'd be curious to know if they shipped me an S5 engine so is there anyway to tell now that the engine is in the car? Just curious as always.
Charles
10-08-10, 05:06 AM
#2
400WHP or bust
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The pump housing has the return for the turbo coolant on the bottom. The S5's had a plastic thermostat housing, the opening on the top is for the water temp sensor for the electric fan I believe.
The S5 rotor housings will have a threaded hole above the trailing spark plug hole for a knock sensor, but they could have assembled the engine with S5 housings, and used S4 internals, you could remove the exhaust manifold and see if the combustion tub is rough or smooth, this will tell you if it is S4 (rough) or S5 internals (smooth machined surface.
Basically you could have got a mutt with the spare parts they had kicking around...
The S5 rotor housings will have a threaded hole above the trailing spark plug hole for a knock sensor, but they could have assembled the engine with S5 housings, and used S4 internals, you could remove the exhaust manifold and see if the combustion tub is rough or smooth, this will tell you if it is S4 (rough) or S5 internals (smooth machined surface.
Basically you could have got a mutt with the spare parts they had kicking around...
10-08-10, 01:48 PM
#3
The pump housing has the return for the turbo coolant on the bottom. The S5's had a plastic thermostat housing, the opening on the top is for the water temp sensor for the electric fan I believe.
The S5 rotor housings will have a threaded hole above the trailing spark plug hole for a knock sensor, but they could have assembled the engine with S5 housings, and used S4 internals, you could remove the exhaust manifold and see if the combustion tub is rough or smooth, this will tell you if it is S4 (rough) or S5 internals (smooth machined surface.
Basically you could have got a mutt with the spare parts they had kicking around...
The S5 rotor housings will have a threaded hole above the trailing spark plug hole for a knock sensor, but they could have assembled the engine with S5 housings, and used S4 internals, you could remove the exhaust manifold and see if the combustion tub is rough or smooth, this will tell you if it is S4 (rough) or S5 internals (smooth machined surface.
Basically you could have got a mutt with the spare parts they had kicking around...
10-09-10, 09:27 PM
#4
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You could tell by the thermo neck if you look at it,IF nothing has been changed on the engine.
S4 thermo necks have two bolts holding it on.
the S5 Plastic thermo-neck has 3 bolts.
Also s5 has an electric Omp ,s4 has mechanical.
S4 thermo necks have two bolts holding it on.
the S5 Plastic thermo-neck has 3 bolts.
Also s5 has an electric Omp ,s4 has mechanical.
10-10-10, 05:46 PM
#6
Engine didn't come with a OMP, had to swap my old one over, which is mechanical obviously.
10-23-10, 09:18 PM
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So if you put your Mechanical omp on,it is an S4 engine,.
You can't put a s5 omp on an s4 engine unless you have the right front cover.. s5 omp has 3 bolts (TII).
You can't put a s5 omp on an s4 engine unless you have the right front cover.. s5 omp has 3 bolts (TII).
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car, diferences, difference, differences, engine, housing, internals, motor, omp, put, rx7club, s4, s5, turbo
