Something missing on overhead cover (T4)

bgleyze · Aug 23rd, 2013, 17:16

Hi,
I think there is something missing (a plug ?) on my overhead cover. I removed the timing belt covers, and I see a hole leaking oil all over the overhead (circled in red).
The car is a 98 V40 T4.
Someone knows what is supposed to be in that hole ?

malteser · Aug 23rd, 2013, 18:31

Dont know what the hole is for but the seal on the oil filler cap might have gone hence oil leaking out

bgleyze · Aug 23rd, 2013, 18:38

Hi,

I've already replace the seal on the oil filler cap, and the oil is not leaking from the cap. I'm pretty sure it is from that hole on the side.
If I don't find what is supposed to go in I'm going to plug it. There is a smaller threaded hole to screw something.

chomerly · Aug 23rd, 2013, 18:50

When looking at the first picture, it looks to me like its coming from one of the bolts just behind cylinder 2's HT lead.

bgleyze · Aug 23rd, 2013, 20:09

I really think it leaks from that circled hole. I can put a screwdriver 2 inches deep in, and there is oil in the bottom.

bgleyze · Aug 24th, 2013, 20:42

Well I pluged the hole with a screw, a washer and a seal. Not pretty, but I hope this will cut the leak.
Anyway if someone knows what is supposed to be there I'm still interested. I think it must be a sensor, screwed in the little threaded hole. Maybe a sensor wich is somewhere else on my car, because I can't see a wire near, and the car runs well.

bgleyze · Aug 25th, 2013, 11:05

Or could it have something to do with VVT ? Obviously my car had no VVT, but I remember the cylinder head had been replace before I bought the car. It has been replaced by a Volvo official, but could he have mixed head or cam cover with a newer model with VVT?

gazO2V40T4 · Aug 28th, 2013, 22:15

I was going to say it looks like the vvt solenoid was missing but it's a phase 1 !!!

chomerly · Aug 28th, 2013, 22:49

I have the exact same hole on my cylinder head and no oil comes out of it.
I would clean down the whole area and leave the car running while you keep an eye out.
I would definitely say that its coming from that cam cover/carrier bolt just behind the coil pack on for cylinder 2.

It may also be coming from the that bolt just adjacent to the hole you are talking about too.
Its a case of following the oil trail.

bgleyze · Aug 29th, 2013, 12:52

Hi Chomerly,
You have the same hole and nothing in it ? And nothing in the little threaded hole neither ?
I have pluged this hole and cleaned the area. I'll check in a few days in the oil is comming back.

Thanks.

Aug 23rd, 2013, 18:50	#4
chomerly Senior Member Last Online: Aug 10th, 2016 10:05 Join Date: Jun 2012 Location: Wolverhampton	When looking at the first picture, it looks to me like its coming from one of the bolts just behind cylinder 2's HT lead. __________________ 1999 V40 1.9T4

Aug 28th, 2013, 22:15	#8
gazO2V40T4 Premier Member Last Online: Feb 14th, 2021 11:50 Join Date: Jul 2013 Location: Penrith, cumbria	I was going to say it looks like the vvt solenoid was missing but it's a phase 1 !!! __________________ 2002 V40 T4 17" Arcadia's ,Boost Gauge ,Forge Dump Valve And Blanking Plate ,Front Upper Strut Brace

Aug 28th, 2013, 22:49	#9
chomerly Senior Member Last Online: Aug 10th, 2016 10:05 Join Date: Jun 2012 Location: Wolverhampton	I have the exact same hole on my cylinder head and no oil comes out of it. I would clean down the whole area and leave the car running while you keep an eye out. I would definitely say that its coming from that cam cover/carrier bolt just behind the coil pack on for cylinder 2. It may also be coming from the that bolt just adjacent to the hole you are talking about too. Its a case of following the oil trail. __________________ 1999 V40 1.9T4

Aug 23rd, 2013, 18:31	#2
malteser Master Member Last Online: Apr 10th, 2024 20:34 Join Date: Dec 2011 Location: bournemouth	Dont know what the hole is for but the seal on the oil filler cap might have gone hence oil leaking out

Aug 23rd, 2013, 18:38	#3
bgleyze New Member Last Online: Yesterday 20:07 Join Date: Feb 2006 Location: LYON	Hi, I've already replace the seal on the oil filler cap, and the oil is not leaking from the cap. I'm pretty sure it is from that hole on the side. If I don't find what is supposed to go in I'm going to plug it. There is a smaller threaded hole to screw something.

Aug 23rd, 2013, 20:09	#5
bgleyze New Member Last Online: Yesterday 20:07 Join Date: Feb 2006 Location: LYON	I really think it leaks from that circled hole. I can put a screwdriver 2 inches deep in, and there is oil in the bottom.

Aug 25th, 2013, 11:05	#7
bgleyze New Member Last Online: Yesterday 20:07 Join Date: Feb 2006 Location: LYON	Or could it have something to do with VVT ? Obviously my car had no VVT, but I remember the cylinder head had been replace before I bought the car. It has been replaced by a Volvo official, but could he have mixed head or cam cover with a newer model with VVT?

Aug 29th, 2013, 12:52	#10
bgleyze New Member Last Online: Yesterday 20:07 Join Date: Feb 2006 Location: LYON	Hi Chomerly, You have the same hole and nothing in it ? And nothing in the little threaded hole neither ? I have pluged this hole and cleaned the area. I'll check in a few days in the oil is comming back. Thanks.

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