Cat convertors for different models

[fatboyfat7]

I know we briefly discussed this before but I need to double check... Is the cat convertor for a GPvR definately different to that of a GPX? I was looking at these on Camskill and they specify 'All Mivec Models'... Wouldnt it be similar fitting difficulties?

http://www.camskill.co.uk/products.php? ... b0s11p2570

[kevinod]

The non Mivecs (GR, GX and I think GS) have a smaller exhaust bore - 50mm - whereas the mivecs - GPX & GPvR have a larger bore, 67mm. I know from reading about decats the fittings are a little different (bolts further apart in one or something like that).

The guys in Camskill know their stuff anyway, so if it's on their website you can pretty much take it as being right.

[Sebastian]

a GX cat wont fit a GR but will fit a GPX

[CJ]

Sebs right as I remember.

GS \ GR - same cat
GX \ GPX same cat
GPvR different cat

The easiest way to find out is to dump the chassis code into CAPs and do a part number compare between models. If If you guys want to pm me chassis codes for a GS, a GR, a GPX and and GPvR I can confirm.

CJ

[finers]

Hey the only thing i noticed diffrent was that the Cat i gave u off my Vr doesnt have an input for a sensor,
think they did away with this on the Vr? u might be able to confirm.

[fatboyfat7]

I'll let you know, either way Im prob going to have to buy myself a new cat and OE lambda to get through the NCT. Roughly 500 - 600 quid. Sickening.

[CJ]

I'll let you know, either way Im prob going to have to buy myself a new cat and OE lambda to get through the NCT. Roughly 500 - 600 quid. Sickening.

FB, send me on your chassis number and I'll do a PNC on the cat. Why didn't the universal lambda do the job, same one as Kace used?

CJ

[Kace]

I'll let you know, either way Im prob going to have to buy myself a new cat and OE lambda to get through the NCT. Roughly 500 - 600 quid. Sickening.

Don't do it - try the cheaper options first, i.e. 1. test the engine coolant temperature sensor - this can also affect emissions, 2. borrow another different CAT, 3. throw in a Redex for good measure, 4. ensure engine is very hot before bringing back for emissions retest at your mechanic, 5. If you really want to, buy another second hand Lambda from Steelroe.

There is absolutely no way I would even contemplate buying a new OEM CAT and O2 Lambda Sensor.

[colm_mcm]

what's the difference between a GPVR and GPX cat, I can't see why one wouldn't fit the other, I mean, a decat pipe will fit either model right?

[fatboyfat7]

Thats what I cant figure out either Colm, on the first post in this thread theres a link to a camskill cat type thing that says 'all mivec models.' Hence my uncertainty.

@ Kace:
1. test the engine coolant temperature sensor - Will a diagnostic show this?
2. borrow another different CAT - I did, it was Finers CAT that just got him through his NCT not too long ago. (also the only CAT for a GPvR I could get my hands on)
3. throw in a Redex for good measure - I did, although only for the tank and a half before the NCT
4. ensure engine is very hot before bringing back for emissions retest at your mechanic - I'll try this but the engine was definately 'hot' for the NCT. I did drive it hard beforehand.
5. If you really want to, buy another second hand Lambda from Steelroe - Likely option Id say

I know what your saying Kace about buying the Mitsi stuff but the universal lambda still read below what it should have. Would the engine coolant temp sensor affect that or just the emissions? Appreciate the help too by the way, the thought of spending that sort of money just for an emissions figure is heart breaking....

@ CJ, PM sent, thanks!

[CJ]

Excerpt of pm sent to Chris based on his chassis no:

The CAT PN is MR355248, same cat in the GX, GPX and GPVR, the lamda sensor is PN MD312191 and is the same on all V6 engined FTOs. The engine coolant temp sensor is PN MD177572 and is the same on bucket loads of Mitsis.

CJ

EDIT: the last test on the GX had to be done 4 times before he could get a reading that passed, the tester was decent enough to keep at it. I'll be running a can of BG 44k (one of the few highly regarded fuel treatments) through the engine before the next test, if the worst comes to the worst, I'll be checking cats and swapping lamdbas.

CJ

[fatboyfat7]

Thanks CJ, might look into borrowing a different of someone so!

Anyone around the Cork area by any chance??

[Sebastian]

Don't forget there are different values accepted for different models/years

[fatboyfat7]

Ah Seb, are you throwing a spanner in the works now??? Mine has to be below 0.3%. Tom said I can borrow his, might as well try and then i can establish where it all might be going wrong...

[Kace]

Don't forget there are different values accepted for different models/years

You sure about that ? - any chance a few people here (with different year FTOs) could post the tolerance values from their NCT certs so that we could confirm.

I would be surprised if these differ for the same make and model of car.

[steelroe]

All the same level I think also.

[Dragonheart]

I think Seb that the different values for different years refers to classic cars if they were going through, as in really old fiestas and mark 1 golfs that sort of stuff, I did see somewhere that there are higher values allowed for some cars but I think regarding FTOs they are all the same. Mine was .03 or something like that as well.

[gary d]

mk 1 golfs and fieta's and the like of that era wouldn't be equipped with cats hence the more leniant figures.

[Dragonheart]

mk 1 golfs and fieta's and the like of that era wouldn't be equipped with cats hence the more leniant figures.

Exactly.

[gary d]

Hey MJ, hows things down under? I figured thats what you meant.

[Sebastian]

erm .. on my nct cert says '' limits depend on year of manufacture'' . i'm not 100 % it applies to our beloved FTO's tho

[CJ]

i'm not 100 % it applies to our beloved FTO's tho

As far as the NCT is concerned , an FTO is an FTO i.e no differenciation in allowable emmisions regardless of year.

CJ