Oil Leak / Hesitation on Acceleration

[Furiokid]

Picked up my new Leon Cupra last Saturday and been having some fun in it lol. Couple of little things I've noticed though........

...when checked underneath found an oil leak coming from the back of the engine and from the front, and also found a little around the hose of the intercooler. Gonna take it back to the garage to get it sorted but wondered whether anyone knew of any common things???

...and also found that when accelerating, especially in second just sometimes it feels like it hesitates a little??

Any help is much appreciated

 

[chrisphysics]

What rpm does it hesitate at? It's not just before 2.5k rpm before the turbo is boosting fully?

Presume you're talking about the petrol version?

 

[M6ccy69]

mine does this! slighty hesitate before 2.5k, before turbo. sweet as after that. usually when i`m setting of from lights. just had it fully serviced, it was so much smoother but i seem its slowly starting again.

 

[Furiokid]

Yeah its the 1.8 20V Turbo. Yeah feels like it does it just as the turbos cutting in, then drops a little then picks up again and is smooth after that. Also found when accelerating hard on the turbo, when I go to change gear it almost stops before I plant the power again. Wasn't sure whether a dump valve would sort that by releasing the pressure and keep the turbo spinning up properly??

 

[M6ccy69]

yeah sounds very like mine, altho mine doesn`t seem to almost stop before i put power on again, just the pulling away at low revs. i`ve been looking a forge split r! very tempted but don`t really want the woshhhhh noise! but another forum member says its more a chatting noise which i would like, just suttle tho. what u think?

 

[Furiokid]

I don't mind the whoosh sound lol, use to it from my old Renault 5 GT. Not sure where is the best place to get one from? Jabbasport are situated about 15mins down the road from me so might have popped down there

 

[andycupra]

Yeah its the 1.8 20V Turbo. Yeah feels like it does it just as the turbos cutting in, then drops a little then picks up again and is smooth after that. Also found when accelerating hard on the turbo, when I go to change gear it almost stops before I plant the power again. Wasn't sure whether a dump valve would sort that by releasing the pressure and keep the turbo spinning up properly??

they have diverter valves as standard. (or dump valve) however they are recirculating and dont dump to atmosphere so are not loud. and this is not recommended as the ecu expects the air to be reused.

The Diverter valves can fail however, and this may show up during gear changes.
Another potential point is that you say there is oil coming from an intercooler pipe. If so its possible its also leaking air. but if the oil is actually coming from the intercooler pipe and is significant, then this may point to bigger issues.

 

[Furiokid]

So is best to go for an uprated recirculating valve then? Well I was gonna take it back to the garage on Sat morning as its still under warranty, but might have a look myself so they can't fob me off

 

[andycupra]

many if not most on here have uprated the DV. (forge 007p is very popular but does cost around £85) or cheaper second hand via the for sale section...

Although as its under warranty you should really let them try to fix it first. - if you change the DV and it doesnt work they may say you have had a go so we are not willing to touch it.

So my advice would be let them have a go, then if it doesnt get sorted, come back hear and we can advise on some things you can check, including the DV and maf fairly easily.

 

[Furiokid]

Thats very true. I am a technician myself but I work on Toyotas, so I know the fundamentals, just unsure as theres new bits on it lol

Thanks very much for your help, I'll let you know how I get on

 

[M6ccy69]

andy, whats difference between forge 007 & forge split r? or are they the same ha! whats going price for these? cheers.

 

[Furiokid]

Just checked it over myself as the garage can't look at it till next wk. Looks to me like theres oil all over the bottom of the turbo and oil on the bottom intercooler pipe. That to me would indicate the seals gone in the turbo which could answer the hestitation due to compression loss

What does anyone else think?

 

[andycupra]

on or in the intercooler pipe?
you may well be right.

 

[andycupra]

andy, whats difference between forge 007 & forge split r? or are they the same ha! whats going price for these? cheers.

The forge 007p is a straight replacement for the standard unit, except that its alloy rather than plastic (can be got in black or chrome finish) and is a piston operation rather than a diaphram operation. - but it basically does the same job as the stock item. Some report a slightly faster operation and its more reliable. It can be adjusted by fitting different rated strings.

The forge split-R was developed where people wanted the loud whooshy sound when changing gear. In many cars this is simple, you would just block off / change the piping so that the dv dumped air externally rather than re-circulating the air. (thus people referring to dump valves). However as the 1.8T engine uses an airflow meter on the air intake (after air filter but before the DV) the ecu can in some circumstances throw a fault code as its expecting the air to be re-used and the volume recorded dont match this. Many people have used a dump valve and not has issues; others have. the argument continues..
but anyway, the forge split R 'splits' the air and re-circulates most of the air, but dumps a small proportion of it. The idea being you keep the air levels within the ECU limts but get the whooshy sound.

The split R is a fair bit more expensive than the 007p, its really up to you what you get. However from what i have seen, people appear to offload the split-R on a regular basis compared to the 007p which is a no thrills, reliable product. Draw your own conclusions from this
The 007p is fit and go, the split-R needs a little bit of time to set up correctly.

But if you want more info there are literally 100s of threads on this subject. But whatever you do, dont start a thread asking if you can, or why you cant have a whooshy dump valve. you will get eaten alive by forum members as it used to be asked daily

 

[M6ccy69]

haha! no worries andy! i can only imagine i`ll get dogged about it ha! i wasn`t wanting it really for the wosshy noise just someone said on low boost can give a chattin sound! u say it needs setting up, whys this? cheers. no more questions ha.

 

[andycupra]

ive not used one, but you have to twist something un til it stops rattling then, two more turns or something.
Sounds easy but ive seen many threads of people asking how to this!

 

[Furiokid]

on or in the intercooler pipe?
you may well be right.

Well I haven't taken the pipe off but from the looks of it, the oils come out of the pipe as theres oil on the pipe where it joins the intercooler but no where else on the pipe from what I saw

 

[Furiokid]

Dropping it off on Friday for them to have a look but apparently there technician reckons its common for the turbo to leak some oil, its meant to do it lol. I get a distinct farmyard smell. . . . . . .bulls**t!!!

 

[andycupra]

some oil in the intercooler pipe is normal. whther the quantity involved in normal is another matter

 

[Furiokid]

Yeah but surely it shouldn't normally leak oil down the back of the engine?