Engine Swap 6af To 4af

[crusin_xt]

Hey Guys,

 

I'm new to RollaClub, so please don't flame me if this has been asked before. I did use the Search but didn't come up with much relevant info.

 

I currently have an 1990 AE90 SE hatch with the OEM 6AF 1.4L carby motor.

The 1.4 is leaking oil into my cooling system, and I've already had the head reconditioned and tested. The 'head reco guys' said that the problem wasn't there. This leads me & my mechanic to thinking that the leak is in the block.

 

I want to know if anyone has transplanted a 1.6L 4AF carby motor into a Rolla with a 1.4L, and what kind of problems I could expect to come across when doing the transplant.

 

If its too much trouble to swap to the 1.6L I will simply track down a 1.4 and stick it in there. However, I would much rather those extra cubic inches :worship::)

 

 

 

Thanks in advance for your help

 

Anthony

[Sam_Q]

it will bolt in and I can't imagine the engine management having an issue. By the way I think those people you have seen are speaking crap, probably leaking a head gasket at the back of the engine.

[MYSTIK[RL]]

they are both A-series engines and both being carby motors there is no need to change the fuel tank and lines(as they are the same for both 6AFC/4AFC). :no2:

 

the jump in power isnt the greatest between the 6A and 4A carby motors

 

 

 

 

 

 

Edit: damn my spelling/grammer is heading down the tubes :y:

Edited September 14, 2009 by MYSTIK

[Sam_Q]

ah of course I misread the question. Best bit is 4afc engines are worth peanuts

[MYSTIK[RL]]

ah of course I misread the question. Best bit is 4afc engines are worth peanuts

 

very true, and there is a high possibility of picking up a re-cond engine/low km motor from a wrecker

[crusin_xt]

Thanks for the reply's guys...

 

SamQ 1. engine management?? LOL u mean "my right foot" haha

I don't see how it could be a head gasket, as we have already removed and reconditioned the head. Maybe you're un-aware, but any mechanic worth 2 cents will replace the head gasket when a head is re-co'd. THIS mechanic happens to be my best mate :lolcry: so i know everything he could possibly do, was done right. the oil came BACK into the coolant about 6 months after we did the head, so thats what makes us believe its the block.

 

MYSTIK 2. Good to know about the fuel lines, thanks. I'm not really chasing the extra power neccesarily. I just assume that the 1.6L might be easier to get a hold of from a wrecker due to the 1.4L's UN-popularity.

I am really interested to know if the engine mounts on a 1.6L will be the same as the 1.4L, and if they'll need modifying to make it fit. Can you shed any light?

 

 

Cheers

Anthony

[MYSTIK[RL]]

mounts should be exactly the same :lolcry: as they are almost the same engine only difference is the displacement :lovin:

[Sam_Q]

Thanks for the reply's guys...

 

SamQ 1. engine management?? LOL u mean "my right foot" haha

I don't see how it could be a head gasket, as we have already removed and reconditioned the head. Maybe you're un-aware, but any mechanic worth 2 cents will replace the head gasket when a head is re-co'd. THIS mechanic happens to be my best mate :dance: so i know everything he could possibly do, was done right. the oil came BACK into the coolant about 6 months after we did the head, so thats what makes us believe its the block.

 

MYSTIK 2. Good to know about the fuel lines, thanks. I'm not really chasing the extra power neccesarily. I just assume that the 1.6L might be easier to get a hold of from a wrecker due to the 1.4L's UN-popularity.

I am really interested to know if the engine mounts on a 1.6L will be the same as the 1.4L, and if they'll need modifying to make it fit. Can you shed any light?

 

 

Cheers

Anthony

 

the blocks should all be the same, so straight swap. Good to hear about your mechanic, you have to excuse me I am so used to mechanics that have no idea at all. Did you happen to check the hardness of the head? also have you thought about chucking a 7a block in there?

[dongsoo]

no point in putting in a 4af into it..... wow it suddenly turned into a stock ae92.

 

put in a 7af and run on all standard 6af gear.