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Engine noise

2K views 20 replies 5 participants last post by  jack s 
#1 ·
Hi,

A sort of growl on acceleration, then a whine on deceleration coming what seems to be the engine compartment.
.
Probably for about three months.

No power loss.

Had recent MOT, so ruled out exhaust and wheel bearings.

Bonnet up and listened to the engine. It certainly appears to be coming from the drivers side.

My thoughts are auxiliary belt tensioner, pulleys, water pump or perhaps turbo.

What do you think ?

Regards,
Jack.
 
#3 ·
Yep the waterpump is on the right of the engine as you look into the

engine bay. Gearbox end, lower down on the front.

Power steering pump is attached to it and drives the waterpump which can

fail. Only a small belt in that area.

Whine on lift off can be the turbo spooling down, a hole in the exhaust can

also give that issue.

Exhaust broken/rusted? Check the flexible section and the pipes where they

enter the rear exhaust box.

Depending on the noise a split boost pipe could also cause a whilstle, small split

and you may not notice the drop in power, especially if its happened over time.
 
#4 ·
Mmm all points to either an exhaust blow close to the turbo or a leak between the airbox and turbo, have you opened the airbox up and started it up? You get a good growl on acceleration and turbo noises on let off
 
#5 ·
Thanks everyone for your advice. Will check it all out.

I gave the car a service last year and now may need a Haynes manual for other engine work/issues.

What I basically need are blown up diagrams of the TDCI engine showing all ancillaries, air induction, cooling systems.

I have blocked the egr and deleted it from the engine management system hence no more engine management light to worry about. Now I want to delete the whole system including the cooler. I see no reason to keep the cooler other than taking the engine a bit longer to warm up.

I want to replace the air intake pipe, but have found no info on where the little side pipe goes from the intake pipe.

I said to the mrs's that other than doing a service, I wouldn't work on the engine myself as I'm getting too old and any way have done all this in my younger days, on much much more simpler engines !!!

This is certainly keeping the old brain going ! ????????????
 
#6 ·
Thanks everyone for your advice. Will check it all out.

I gave the car a service last year and now may need a Haynes manual for other engine work/issues.

What I basically need are blown up diagrams of the TDCI engine showing all ancillaries, air induction, cooling systems.

I have blocked the egr and deleted it from the engine management system hence no more engine management light to worry about. Now I want to delete the whole system including the cooler. I see no reason to keep the cooler other than taking the engine a bit longer to warm up.

I want to replace the air intake pipe, but have found no info on where the little side pipe goes from the intake pipe.

I said to the mrs's that other than doing a service, I wouldn't work on the engine myself as I'm getting too old and any way have done all this in my younger days, on much much more simpler engines !!!

This is certainly keeping the old brain going ! ????????????
The small pipe from the intake goes to the vacuum solenoid on the front left OR to the vacuum pump on the rear left of the engine (above the gearbox)
 
#7 ·
Thanks for that Ben.

I hope you don't mind me asking another question !

I am aware of the pipe from the egr to the cooler, but where does the pipe from the cooler go ?

Is there anything else to take into consideration when deleting the cooler ?

Many thanks
 
#8 ·
Thanks for that Ben.

I hope you don't mind me asking another question !

I am aware of the pipe from the egr to the cooler, but where does the pipe from the cooler go ?

Is there anything else to take into consideration when deleting the cooler ?

Many thanks
Unfortunately I've never been that far round mate, I deleted the pipe from the cooler to the egr but that's it. Left the cooler in place
 
#10 ·
If deleting the cooler you need to sort the water pipes.

The way things keep changing for the MOT I would leave the pipes in place

and just stick a blanking plate in there.

Little benefit to using an EGR delete, the standard EGR flows well and has

very little restriction. Someone said it makes more room which it does but

how often are you going to be working in that area?

For me thats twice, a set of glowplugs and when fitting a silicone boost pipe.
 
#11 ·
If deleting the cooler you need to sort the water pipes.

The way things keep changing for the MOT I would leave the pipes in place
and just stick a blanking plate in there.

Little benefit to using an EGR delete, the standard EGR flows well and has
very little restriction. Someone said it makes more room which it does but
how often are you going to be working in that area?

For me thats twice, a set of glowplugs and when fitting a silicone boost pipe.
What about the weekly visit to the oil stat? Access is way easier without that pipe... unfortunately my arm was twisted because the flange on the egr pipe had separated so was blowing, decided to leave egr in place delete the pipe.... my mondeo currently has mould growing inside slightly now
 
#12 ·
Thanks Purple for your response and advise.

I totally agree with you that the MOT rules/standards etc are constantly changing, that's why I had the egr deleted from the engine management system as if the engine management light was on it would fail the MOT.

I did clean the valve as car was blowing out clouds of black smoke and hesitating. It made no difference. I put a new valve on and within 6 months, same problems. In fact it became so bloody dangerous with kids in car and hesitating when pulling out of junctions that I immediately blanked the thing off.

With respect and in my honest opinion I see no point in having it in my engine compartment. I have found a seller that supplies delete kits, also a blanking plate for the cooler. I will however have to sort out the water pipes.

Again with respect, I want to change the intake pipe. In the olden days !!, when I was young, the talk was about porting, gas flowing, scavenging etc. and now looking at the intake pipe, it's made of like rubber accordion bellows, which in my mind doesn't aid good air flow. I could be talking out of my head, I'm am an old sod, but surely the better flow of air/gasses still apply.

Forgive me if you think I'm out of order, it's just how I think.

Best regards
Jack
 
#13 ·
Yeah, spent hours porting the A series head on a classic mini. Seemingly a huge

difference although no actual power figures.

Not quite as essential after adding a turbo though. Easy for the turbo to push more

than enough air into the engine even with a restricted pathway.

Cannot see a blanking kit offering anything over just adding a blanking plate to the EGR.

I see fitting one as a because I want to rather than because it offers any advantages.
 
#14 ·
Point taken Purple. I agree there is no advantages of delete, but it is a useless piece of junk that personally I can do without.

The 'A' series, what an engine. In my time Turbo's were just coming to the fore in maestro's and montego's. I had a mini, 1275cc, twin SU's and spent most of my time trying to tune them !!

Gas flowing the head was an art and I believe, did have benefits for the flow of induction and exhaust, although at that time it was hard to measure, perhaps psychological it felt faster/better !!

The egr cooler connected to the exhaust manifold is just another complication for exhaust flow exiting out of the engine.

My theory, whether right or wrong, is that an engine runs better if it can breath and dispose of waste efficiently.

Regards,
Jack.
 
#16 ·
Yep the waterpump is on the right of the engine as you look into the
engine bay. Gearbox end, lower down on the front.

Power steering pump is attached to it and drives the waterpump which can
fail. Only a small belt in that area.

Whine on lift off can be the turbo spooling down, a hole in the exhaust can
also give that issue.
Exhaust broken/rusted? Check the flexible section and the pipes where they
enter the rear exhaust box.

Depending on the noise a split boost pipe could also cause a whilstle, small split
and you may not notice the drop in power, especially if its happened over time.
Thee an old phrase for the !!!

????????
 
#17 ·
Main one to split is the one to the EGR valve. I think that one suffers the most as

when the engine rocks it puts that pipe under the most pressure.

Opposide side intercooler pipe and the short 6 or 8inch pipe under the engine/gearbox

on 6 speed cars. Had that pop off on my 2004 car.
 
#20 ·
I was just trying to put the record straight re 'thee', Doesn't matter, the spontaneity has gone.
Googling 'thee' :
pronoun
archaic or dialect form of you, as the singular object of a verb or preposition.
"we beseech thee O lord"
 
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