Hi,
Just finishing up my M52 swap and wondering if this tapping noise is most likely to be sticky injectors or noisy lifters?
I had the injectors sent off to InjectorTune a while back and they did come back with a note saying they could get stuck after a clean. I’ve given them a tap etc insitu but hasn’t made a difference.
Any ideas ?
M52 tapping noise
Moderator: martauto
Also I realised I only put 6L of oil in, still have a 1L container left. I had checked the dipstick and it was between the marks so forgot to add any more after that. I guess the dipstick is now slightly incorrect due to the new sump?? I will chuck another half litre in and make a new mark on the dipstick I guess.
I assume this is the bleeding process:
Will give it a go and report back, cheers.Firstly, get the correct viscosity oil, you will not cure the problem if the oil is too viscous.
The procedure is pretty simple and is designed to bleed the HVA elements:
Check the oil level, replenish if necessary. Run the engine at idle and listen for noisy tappets, if the tappets are noisy run the engine at 3000RPM (with the car stationary) for 3 minutes. Return the car to idle for 30 seconds (to achieve minimum oil pressure) and listen for noisy tappets. If a tappet is still noisy increase engine speed to 3000RPM again for 3 minutes.
It is possible that you may have to repeat this procedure 5 times to bleed the tappets correctly. If the problem persists there may be another problem but in most cases this will provide the cure.
I had a go at the bleed process yesterday but the noise really sounds like its coming from injector area, you can feel it with a hand on the fuel rail also. I had the injectors sent off to InjectorTune about a year or so ago for cleaning, they did come back with a warning that they could be sticky if not fitted straight away once the cleaning fluid had evaporated. Wouldn't they have spotted an issue with the injectors during the cleaning process if they were shot? This is first time running car on the injectors since being cleaned.
I think the noise was reduced once I had added more oil and ran a couple of bleed cycles. Still a little noise present though
I think the noise was reduced once I had added more oil and ran a couple of bleed cycles. Still a little noise present though
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Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
Switch the ignition on and off a few times while listening to it. Injector noise will cease instantly, while tappets, or anything more ominous, will continue while the engine is still turning.
Did the test Brian suggested and confirmed sound went away as soon as ignition was cut.
Took a punt on a new camshaft sensor and the noise has completely gone. Quiet as a mouse now so that was a result.
Now to just get the hydraulics sorted and I can think about driving the bloody thing!
Took a punt on a new camshaft sensor and the noise has completely gone. Quiet as a mouse now so that was a result.
Now to just get the hydraulics sorted and I can think about driving the bloody thing!
Yes I did.
I've just installed a new sump gasket, this time without sealant. I've only had the car running for around 10mins on idle but so far so good, no leaking!!
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Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
If you use sealant on a sump gasket, use it very sparingly. Any that squeezes out inside the sump is very effective at blocking the filter mesh on oil pick up pipes.
I think my issue was in my effort to use it sparingly I used it unevenly...probably opening up some gaps.Brianmoooore wrote: ↑Fri May 03, 2019 9:44 pmIf you use sealant on a sump gasket, use it very sparingly. Any that squeezes out inside the sump is very effective at blocking the filter mesh on oil pick up pipes.
I'll update this thread once I've had the car on a proper road test. Just got to find some time to fit the second new clutch slave cylinder and get it bled up.
Yes but needed to buy an engine support beam so I could drop the sub frame down and out of the way. Pretty straight forward though.
Cool. I will add that to the ever growing list of jobs to get done before I can get it on the road!
Just another quick question - did you use a 2 speed fan or single speed? I've used the auxillary fan from my donor car and trimmed it down so it sits nicely in front of the rad. Was thinking of just using the high speed setting triggered by the Ti fan switch at the lower of the two temps. Hopefully that will do the job.
Just another quick question - did you use a 2 speed fan or single speed? I've used the auxillary fan from my donor car and trimmed it down so it sits nicely in front of the rad. Was thinking of just using the high speed setting triggered by the Ti fan switch at the lower of the two temps. Hopefully that will do the job.
Sounds good, I'm using the 2 speed aircon fan as well. I've knocked up a loom for a single speed fan but haven't hooked it up yet. Should be pretty easy to add some more wires to run the low speed so will probably do that.
I don't have a garage to work in so it looks like I will be making slow progress (if any) until the weather gets better!
I don't have a garage to work in so it looks like I will be making slow progress (if any) until the weather gets better!