Engine knocking sound
Engine knocking sound
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Discussion

Richard Kitson

Original Poster:

13 posts

171 months

Sunday 4th December 2011
quotequote all
Hi,

Ive just refitted a shortened sump to my car. Upon restarting my engine started doing this....

http://www.youtube.com/watch?v=Kq4Y2_fWVBo

Any ideas?


Steffan

10,362 posts

250 months

Sunday 4th December 2011
quotequote all
SOMETHING SERIOUS DO NOT RUN THE ENGINE!!!

Either you have dislodged a bearing/engine component or the something is hitting the moving parts.

Take the sump off and INSPECT the source of the noise. Check what is hitting something else. Fix it.

Could be the lowered sump is not giving enough clearance.

From experience this sound is terminal on the engine unless resolved BEFORE any more damage is done.

Worth asking a mate round who knows mechanics. I would NOT run this again until fixed. It does not sound like the crank banging to me but SOMETHING is hitting something else HARD. If you run as it is there will be a big bang.

motco

17,315 posts

268 months

Sunday 4th December 2011
quotequote all
That is most certainly a mechanical clash in the sump. It isn't heavy enough to be a bearing (why would it be if you only removed and replaced the sump, albeit with another?) but there is an interference between the crank and, probably, the sump or a part thereof. I'm afraid to say it's a sump drop off job. I would not use the oil again, either, it may have metal particles in it now. For what it's worth I suspect there is no serious damage done in that short time.

Steve_D

13,801 posts

280 months

Sunday 4th December 2011
quotequote all
Ouch!!!
As said the sump has to come off.
Could well be something silly like the oil pickup tube.
If the sump was shortened was the oil pickup also modified or is it now bent and being hit by the crank?

Steve

spaximus

4,364 posts

275 months

Sunday 4th December 2011
quotequote all
The other thing is does the oil pressure light go out? I have seen this before, shorten the sump, but not the pick up, pipe crushes onto the sump base and picks up no oil.

As others have said sump off and have a look, also you will need to flush the oil out as bits of metal has been worn off what it is hitting and will be in the oil and filter.

motco

17,315 posts

268 months

Sunday 4th December 2011
quotequote all
If you don't know the answer to the oil pressure light switch, do not start the engine again to find out!

Richard Kitson

Original Poster:

13 posts

171 months

Sunday 4th December 2011
quotequote all
I thought it may be the sump clashing, but I wanted more opnions before I took off the sump again. Theres plenty of baffles one of which sits above the pick up pipe (the prime offending suspect). I have contacted the guys who made it and they said they have made over 50 of them in the past 4 years and had no problems.

The pick up pipe has been shortenened and the oil preassure is showing 50%, but Ive only had it running for less than a minute for obvious reasons. Sump comes off next weekend.

Mr2Mike

20,143 posts

277 months

Monday 5th December 2011
quotequote all
That is definately not the sound of a failed bearing so I don't think you have any worries there. As others have said this is almost certainly a big end cap hitting part of the shortened sump, possibly an oil baffle or similar. If so the answer will be blindingly ovbious when you remove the sump as there will be clear witness marks.

Richard Kitson

Original Poster:

13 posts

171 months

Thursday 8th December 2011
quotequote all
So sump is off and this is what I found....



I think that baffles has magically changed shape, can't of clashed because the guys who made it said they had made 50 over 4 years and never had a problem............ rolleyes

Going to remove the sparks and check the big end this weekend.

motco

17,315 posts

268 months

Thursday 8th December 2011
quotequote all
I wonder if the fact that your Pinto is a 1.6 makes any difference. Most kit car Pintos are 2.0 litre and it is possible that the bottom end is different enough to confound the sump fabricator's design.

Richard Kitson

Original Poster:

13 posts

171 months

Thursday 8th December 2011
quotequote all
Yeah the 2ltr is more popular but you would have though 1 out of 50 of these sumps would have been fitted to a 1.6; plus I asked them about this before and they said the sump will fit all pinto engines.

And before you ask yes this is most definatly a pinto engine; the engine came from a cortina. As far as I am aware the cortina only had the x-flow or the pinto engine. The engine was built in march 1980, corresponding to when pinto's were fitted to cortina's and it has the overhead cam which the x-flow doesn't. Although I haven't actually seen my engine code written next to the words pinto. Code is 7ohm6015AA if anyone can confirm. The next engine in the fords line was the zetec and its definatly not a zetec either.

Do you think that kind of impact would damage the big end? or any part of the crank assembly for that matter?

motco

17,315 posts

268 months

Thursday 8th December 2011
quotequote all
I doubt it, the crank/rods is/are a substantial piece(s) of metal and the sensitive bits (bearings) are protected when it's assembled. The sump baffles are simple bits of mild steel with no real strength. I think, subject to contradiction by others, that I'd put the old sump back and run it to see. If the crank is damaged you're not going to make it worse to any great extent by a quick run-up to check oil pressure etc.

Sam_68

9,939 posts

267 months

Thursday 8th December 2011
quotequote all
^^^^

Yeah, I'd second that. I'm sure you'll be fine. Just clean up the mangled baffle bung it back together, turn it over by hand to make sure nothing's still fouling, then fire it up.

Steffan

10,362 posts

250 months

Thursday 8th December 2011
quotequote all
Your are probably right.

I am not litigious. But there is a clear lack of care in this case.

The extent of the damage suggests to me either the garage who modified the sump got it VERY wrong or this is the wrong sump for this engine.

Either way I would be asking the question of the garage.

Their current position of we have never had this before is untenable.

They have got it now.

What are they going to do about it, would be my approach.

AdiT

1,025 posts

179 months

Thursday 8th December 2011
quotequote all
There'll be no damage to the big end bearing from that. I wouldn't bother taking it apart. Trim/reshape the baffle, refit, remove plugs and turn by hand to ensure nothing fouls.
The baffle might only have needed to be tweeked a few mm to catch. Can you garentee you didn't cause that?

Richard Kitson

Original Poster:

13 posts

171 months

Thursday 8th December 2011
quotequote all
no no no sump is not going back in. There was still a banging sound, when it was last run so alright that baffle has been bashed out of the way there was something still clashing somewhere. I also checked the oil preassure, which seemed fine.

Yes I would tend to agree with you baffles are useually nice thin aluminium. Unfortunatly this was approx 2mm steel or 1.6mm and has that support towards the front, but only spot welded in from the top so the top weld has probably peeled back a bit.

Still its has ripped through that plate meaning its had a hefty clout.

Sam_68

9,939 posts

267 months

Thursday 8th December 2011
quotequote all
Richard Kitson said:
no no no sump is not going back in. There was still a banging sound, when it was last run so alright that baffle has been bashed out of the way there was something still clashing somewhere.
...which is why I suggested turning it over by hand.

If something's still catching, trim it or bash it with a big hammer until it doesn't.

Stop being a wuss... it's a Pinto, FFS, not a Cosworth DFV! biggrin

motco

17,315 posts

268 months

Thursday 8th December 2011
quotequote all
Sam_68 said:
Stop being a wuss... it's a Pinto, FFS, not a Cosworth DFV! biggrin
Oi! biggrin


AdiT

1,025 posts

179 months

Thursday 8th December 2011
quotequote all
The crank won't have bent the baffle completely clear. It'll bend it with the first few hits but still keep hitting it after thatand it just flex back. That'll be the noise you could still hear. Reshape the offending bit, refit and turn by hand to check it clears.

Skyedriver

22,159 posts

304 months

Thursday 8th December 2011
quotequote all
Puzzles me to know that the OP doesn't really know the difference between a Pinto & a Crossflow Ford yet is gayly fitting engine parts.
Rather than the big ends could it be the balance parts of the crank, they do tend to hit sumps when fitting modified pans or big cranks to small blocks etc