Difference between 172 and 182 engine

[NeilUK]

Apparently the car I have is a 172 134k with a 182 engine swapped of 96k, how could I check to make sure it is actually a 182 engine block? Any codes etc?

 

[182Trophy]

I thought they were the same engine, just a different manifold for the 182. A 4-1 for the 182 and 4-2-1 for the 172?

 

[MarkX]

Inlet manifold is different too afaik, there must be other minor differences too

 

[NeilUK]

Ok on checking the back of the engine, I have four big pipes coming out of the engine going down into one, 4-1 ?

 

[Ol’ Tarby]

Exhaust manifold and a breather under the upper inlet are the only differences iirc

 

[rdoxenham]

Ok on checking the back of the engine, I have four big pipes coming out of the engine going down into one, 4-1 ?

Correct, the exhaust manifold is different between the 172 and 182. On the 172 you'll have a 4-1, and on the 182 you'll have a 4-2-1.

 

[llgsimpson]

172,182 engines are the same ain't they? The Intake and exhaust are different which technically isn't the engine

 

[rdoxenham]

172,182 engines are the same ain't they? The Intake and exhaust are different which technically isn't the engine

Some people in the past have said that the crank is slightly different, but I've not come across any differences that I've noticed.

 

[182Trophy]

Ok on checking the back of the engine, I have four big pipes coming out of the engine going down into one, 4-1 ?

Yes. That is a 4-1 manifold. A 172 would be 4 pipes, into 2, into 1. Hence 4-2-1. I am sure someone with more knowledge about these engines will be along soon to help with other differences if any.

 

[rdoxenham]

Yes. That is a 4-1 manifold. A 172 would be 4 pipes, into 2, into 1. Hence 4-2-1. I am sure someone with more knowledge about these engines will be along soon to help with other differences if any.

Guessing a typo above... 172 is 4-1, 182 is 4-2-1.

 

[182Trophy]

Correct, the exhaust manifold is different between the 172 and 182. On the 172 you'll have a 4-1, and on the 182 you'll have a 4-2-1.

I thought it was the other way around mate? 4-1 for the 182, helping with quicker flow and the gain of 10 bhp. Well claimed anyway, which is bollox but that is another story.

 

[Adey.]

182 manifold is 4-2-1 172 is 4-1

 

[NeilUK]

Oh great so it's just a 172 engine? Looks like I've been had then As I said four pipes going into one main exhaust, they look to be non standard ones as well possibly aftermarket.

 

[ashley_t]

Could still be a 182 engine.... 172 & 182 exhaust manifolds are interchangeable. Wont have 182 power though... Its not just the exhaust that makes the extra power

 

[NeilUK]

Could still be a 182 engine.... 172 & 182 exhaust manifolds are interchangeable. Wont have 182 power though... Its not just the exhaust that makes the extra power

Ah I see, I think the story was that his car was high milage and as he was a mobile mechanic came across a 182 that had a rear end smash. He put the 182 straight in which had 86k on it at the time. He obviously was a car mechanic going by his tshirt and one of the cards I found. Always a concern though when buying a car from someone

Any other ways to find out? Would rather have a 90k engine from a 182 than a 172 with 134k!

 

[ashley_t]

Yup i know what you mean fella! I just brought a non running 172 in the process of having a 182 lump fitted as the old engine was knackered. After many hours i think it was in the process of having the engine removed as after spending many hours trying to get it to start the "replacement" engine is knackered aswell !

 

[scotty2hotty81]

Pointless thread is pointless, as said inlet/breather plate is the only difference.

 

[ashley_t]

Take the upper inlet off... If theres a breather pipe sticking up into the inlet its a 172... Non then its a 182 lump

 

[Addicted]

Tbh, if they were changing the engine they wouldn't change the exhaust manifold anyway as it's the same bolting. It'd just be the engine itself that's changed imo.

 

[NeilUK]

Ouch, I feel your pain!

 

[NeilUK]

Tbh, if they were changing the engine they wouldn't change the exhaust manifold anyway as it's the same bolting. It'd just be the engine itself that's changed imo.

After what was said here, agreed guess I'm learning more every day

Perhaps there is no way to know if it was just a straight swap, only the seller does

 

[Addicted]

As long as the engine runs fine that's the important bit

 

[NeilUK]

As long as the engine runs fine that's the important bit

Just needs a new dephaser pulley at some point, it's slightly noticeable but nothing like some of the ones I've seen :O

 

[AlexW]

Makes no differance if it was 172 or 182 block etc. Just enjoy it!