Silver C70 T5 - Manual - 400BHP

**Wobbly Dave** · Sunday 14th July 2013, 17:22

Well I deliberately have done FA with the car today. Smithy reckons I need a new VVT pulley - so I will probably order one tomorrow.

**smithy** · Sunday 14th July 2013, 17:52

It's only a thought because they have been known
To go and that would also explain
The cam timing being out.

**Wobbly Dave** · Sunday 14th July 2013, 18:11

My only other thought is that the centre nut is loose?

**Harvey** · Sunday 14th July 2013, 18:54

Originally Posted by Wobbly Dave

My only other thought is that the centre nut is loose?

Has yours still got the Torx drive cap fitted if so just remove it to get to the nut,I can email you the dealers guide of how to set it up if that woulD help you. It does sound long winded way but thats what they say.

**jardon** · Sunday 14th July 2013, 19:22

My VVT was out but it didn't take Tim long to resolve the problem. Quite a few get incorrectly set up and I'm not even sure that all main dealers can get it right. Symptoms can be subtle but erratic idle and driveability issues are common - sometimes not diagnosed as the ECU allows a wide range of adaptation in VVT operation and symptoms can consequently be intermittent with misleading codes. I'm not sure how reliable the units are but just be sure it was set up correctly before buying a new one - a quick Googling suggests that they are north of £100. I'm not knocking your skills in aligning it just letting you know people §§§§ the process up reasonably frequently!

**T5frankie** · Sunday 14th July 2013, 19:27

Originally Posted by jardon

My VVT was out but it didn't take Tim long to resolve the problem. Quite a few get incorrectly set up and I'm not even sure that all main dealers can get it right. Symptoms can be subtle but erratic idle and driveability issues are common - sometimes not diagnosed as the ECU allows a wide range of adaptation in VVT operation and symptoms can consequently be intermittent with misleading codes. I'm not sure how reliable the units are but just be sure it was set up correctly before buying a new one - a quick Googling suggests that they are north of £100. I'm not knocking your skills in aligning it just letting you know people §§§§ the process up reasonably frequently!

your idle was very erratic Dave

**Wobbly Dave** · Sunday 14th July 2013, 19:58

Originally Posted by Harvey

Has yours still got the Torx drive cap fitted if so just remove it to get to the nut,I can email you the dealers guide of how to set it up if that woulD help you. It does sound long winded way but thats what they say.

Torx T55 holds the cap in place. thanks for the offer of help - all information would be gratefully received.

**Wobbly Dave** · Sunday 14th July 2013, 20:07

Too §§§§ed off with it to even bother lifting the bonnet today.

**Wobbly Dave** · Monday 15th July 2013, 23:22

Well a new day dawned & it's still nice outside. Finally figured out what I was doing wrong. By winding anti-clockwise against the crank locker - this was allowing the exhaust cam to wind backwards against the VVT - thus making it look like the cams are not aligned. I am satisfied that the timing is good for now. Good enough to try the compression test again.

So I have tensioned the belt again & reinstated the starter. Bad news is the battery is too flat to retest the compression. Wife is stealing the diesel to go to see her parents & I don't have a battery charger - so I'll have to get on my bike and go down to Halfords.

Either way I think I will still replace at least the bolt holding the VVT pulley on if not the pulley itself. TBH I don't really know how to tell if the VVT pulley is faulty or not - just that I'd feel happier replacing it.

**Harvey** · Monday 15th July 2013, 23:31

Let's hope that was all that was wrong.

**Wobbly Dave** · Monday 15th July 2013, 23:42

Originally Posted by Harvey

Let's hope that was all that was wrong.

Major big thanks for sending me the instructions

**graemewelch** · Tuesday 16th July 2013, 06:30

fingers crossed for you. im fairly confident that this is the problem and you wont need to remove the head. will you still be sending the turbo off to be checked over

**Wobbly Dave** · Tuesday 16th July 2013, 11:11

turbo came off last week & went to Turbo Dynamics - intial feedback, when I spoke to Tom @ T/D yesterday is that bearing feels ok to him - but they are going to strip it down to the CHRA, put some oil pressure through it & spin it up on their balancer any way just to be sure.

I have essentially stripped the top half of the engine back to just the bear head. All that remains on it are the cams, belt, rocker cover. I too am praying that against the odds I have gotten away with it.

Battery last night was only just strong enough to lock the car. So I unlocked it, left the bonnet on just the safety catch & pushed the tabs down by hand.

**Wobbly Dave** · Tuesday 16th July 2013, 21:22

Bad news I'm afraid. Battery is charged

1 came up to 12 bar. 2 is still down at 10 bar - rest are as they were - 12 bar.

Guess I have no choice now but to take the head off. Bummer.

**stribo** · Tuesday 16th July 2013, 21:27

Originally Posted by Wobbly Dave

Bad news I'm afraid. Battery is charged

1 came up to 12 bar. 2 is still down at 10 bar - rest are as they were - 12 bar.

Guess I have no choice now but to take the head off. Bummer.

That doesn't sound good mate, lets hope it hasn't damaged a piston as well.

**graemewelch** · Wednesday 17th July 2013, 01:00

as above hope theres no serious damage and its a false alarmmight be worth droping a bit oil.in cylinder no 2"and doing another test just incase ifs dry. ill keep my fingers crossed for you

**Wobbly Dave** · Wednesday 17th July 2013, 01:06

Can I do a compression test now that the rocket cover & the cams are out? Probably not.

Well there are no marks on the cam lobes - and the tops of the lifters (silly name really - surely "pusher downerers" is better LOL) look fine.

Nope tomorrow the head is coming off. Then I might know something - or I might stand there scratching various body parts (not uncommon for me - LOL).

**Biff** · Wednesday 17th July 2013, 01:18

Keeping everything crossed for you WD. Be a shame for it to dent your wallet after building such a bang on engine. Like your term for lifters too.
Ps that picture of it on 19's you posted is possibly the nicest c70 I've seen. You need those wheels back in your life even if it does look a right sleeper on the comets.

**graemewelch** · Wednesday 17th July 2013, 01:27

Originally Posted by Wobbly Dave

Can I do a compression test now that the rocket cover & the cams are out? Probably not.

Well there are no marks on the cam lobes - and the tops of the lifters (silly name really - surely "pusher downerers" is better LOL) look fine.

Nope tomorrow the head is coming off. Then I might know something - or I might stand there scratching various body parts (not uncommon for me - LOL).

cant see why not. all the valves will be shut. just take plugs out of pot thats not getting tested

**Wobbly Dave** · Wednesday 17th July 2013, 01:31

Tell that to the thieves that half-inched them.They were imported from the US & cost a lot of dosh. Company that sold them to me no longer exists.

I am thinking I will do some extra bits on the pieces I have off. Improve the head a bit more.

Polish the exhaust manifold & get it coated. Get the DP coated too.

Not looking fwd to finding that my cylinders are goosed or something else even worse.