Hi all,

I have a 2000 S Type 4.0 V8 and have had a few EML problems with it. They all seem sorted now but I have a new problem.

To sort one of the problems, I had to change one of the VVT solenoids. This meant removing the rocker cover. I asked a mate to do it whilst I was at work and supplied the parts, including new rocker gaskets and plug well seals.

Now I have a leaky rocker cover and wondered if there is a trick to changing the gaskets that he's missed (taking into account the poor access).

Better still, is there someone out there that is willing to help me replace them again. I've only done one so far but have both gaskets here (one on the car now).

I was told that you can reuse the gaskets and the one that's been fitted has only been on for a month. I'm sure it's to do with the tightening procedure or torque settings that's causing my problem.

Anyone near me (Reading) fancy helping one weekend?

Thanks
Mike

 

Hi Mike,

Sorry, not near you but I've changed my fair share of 4.0 V8 cam cover gaskets.

First things first:

When changing the gaskets - there are a few things to keep in mind:

List of gaskets (check my posts - I have all listed with Jaguar part numbers)

Cam cover gasket
VVT O-Ring
4 Spark Plug Well O-Rings
14 or so - rubber O-rings for each of the bolts
2 o rings for bolts that go into the head (between the coil on plugs)

When you change the cam cover - you should have also considered changing the above gaskets as well.

I find Jaguar OES to be best naturally - aftermarket seems to work well short term but are problematic...

Where are the leaks coming from? front or back of cover?

Also, download JTIS for the proper torque specs and tightening procedures. These covers are plastic - you can warp them (and the gaskets) by over tightening them. You are supposed to put a dab of RTV where the head and front timing cover meet.

My trick is to also put a dab of RTV along the lower rear edge of the cam cover gasket too as often the pooled oil collects as the motor sits on a very slight angle and leaks past the gasket onto the exhaust downpipe.

Just my extended $0.02 on the topic.... Good Luck...

 

You can download a copy of the JTIS workshop manual from this forum at no charge, which outlines the procedure for renewing the cam cover gaskets.

I have had little success with the aftermarket gaskets available from various parts houses, but have not had any recurring leaks when using the Ford/Jaguar OE gaskets and seals.

One of the steps with renewing the gaskets is to apply a small amount of silicone sealant to the area where the timing cover meets the front of the cylinder head.

Once in place the cam cover should be torqued correctly and evenly so further leakage can be avoided.

 

Thanks guys.

Reckon I'll have to grab a copy of JTIS and do them again.

Thanks again,
Mike.

 

Hi all.

Bit of an update really.

I have a Jaguar mechanic that has advised to fit only genuine rocker cover gaskets and has said he'll do it for £60 plus parts.
This being the case, I've booked it in with him for Saturday.

Thanks
Mike