Thread: Hard brake pedal in reverse

Sick it out, tube and large syringe

Justin,

Do you know if this occurs on diesel D4’s as well? If so, can you post a pic of the vacuum hose to disconnect to check?

thanks in advance,

Eric

There was a recall on diesel D3s. Its engine oil coming up from the vacuum pump. The recall changed the plumbing from the vacuum pump (back of engine driven off the camshaft) to the brake vacuum booster. Shouldn't be an issue on a D4 unless a seal has gone in the vacuum pump.
Regards Barry

Originally Posted by justinc

Diesel or petrol? Diesel were prone to this issue only.

So I've just realised that the electric vac pump I bought months ago from a D3 wreck, was obviously a petrol, that's where my confusion started,I couldn't work out how an electric pump would let oil into the booster, of course it can't.

I think the brakes are getting harder,
I'll have to get into the job seriously this week,I found a government recall on the pump, looks like there is a sticky valve that can give problems as well.
Thanks for your advice

Cheers James

Originally Posted by Barryp

There was a recall on diesel D3s. Its engine oil coming up from the vacuum pump. The recall changed the plumbing from the vacuum pump (back of engine driven off the camshaft) to the brake vacuum booster. Shouldn't be an issue on a D4 unless a seal has gone in the vacuum pump.
Regards Barry

So is there any evidence now that the updated plumbing between the vac pump and the booster actually fixes the problem?

I've discovered that the issue with ours isn't reduced vacuum capacity in the booster due to it being full of oil, the fault is the booster is leaking quite badly...No doubt due to oil ingression.
I'm thinking it already has the updated plumbing, but that it was fitted AFTER the current booster already had oil in it, so I'm hoping a new booster will fix the problem.

Other than that I guess I would need to also replace the vac pump if it was faulty to stop oil ingression, which I really don't want to do !
But how would I know that it was faulty?

It creates good vacuum, and there appears to be very little oil actually in the booster.

Any thoughts from anyone, I'd love to hear!

My '08 D3 has started to get a random 'Hard Pedal'. How long does a recall stay in effect? Especially a safety recall.

Originally Posted by Saitch

My '08 D3 has started to get a random 'Hard Pedal'. How long does a recall stay in effect? Especially a safety recall.

Has the recall been performed before, is there is a sticker on the door jamb ? It should be still valid if it hasn't had it done but getting a dealer to co-operate is another matter.

Originally Posted by loanrangie

Has the recall been performed before, is there is a sticker on the door jamb ? It should be still valid if it hasn't had it done but getting a dealer to co-operate is another matter.

Only 'Airbag' and VIN plate.