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Timing chain rattle! 

 

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 Post subject: Timing chain rattle!
Posted: Tue Sep 20, 2011 7:49 pm 
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So I've got a 1992 eb 3.9 mpfi, wade mix grind cam, j3 chip, new timing chain, guides, gear, tentioner and it even came with a side of chain rattle...
Between 2400 and 3000rpm the chain rattles a little, audible within the cabin.
Motor has 210,000ks on it, runs pretty well, has low oil pressure when it's hot.
This a usual problem with these motors?
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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 8:24 am 
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Don't know how common it is. But with this engine, it's the oil pressure that tensions the timing chain (the small spring in the tensioner is just to keep the chain from falling off the gears). So, if you have low oil pressure, that could be your problem. There is a small oil flow restrictor in the front of the block to keep pressure up in the tensioner. If this is missing or installed backwards, you might not be maintaining enough oil pressure in the tensioner.

 

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 3:05 pm 
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You can also get chain rattle when it's worn and/or stretched. Is it still the original chain?

 

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 3:33 pm 
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I had chain rattle after I installed a 977b, then went back to stock cam. Chain rattle is still there :(

977b must of stretched or damaged something .
People have replaced all the guides, chain and tensioner and still had chain rattle.
So f**k me if I know what fixes it.

My chain rattle is fairly quiet, I've tried resetting the timing tensioner many times and still did nothing, my chain isn't too loose or too tight , so far done no damage so I'm putting up with it :roll:

 

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 3:35 pm 
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Efxr6wagon- is the flow thinging a filter looking thing lol ?? Is it in the timing tensioner ??

 

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Dark Agents,Sunroof, bilstein shocks, 6000k HIDS, 329 mm slotted rotors, twin pot calipers , Climate Control, GarrettT04 turbo,log manifold, crow turbo cam, microtech lt10c, 42lb injectors , 044, surge tank , T56 , rebuilt bottom end , alloy plenum .

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 4:24 pm 
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Its in the block in the middle of the O-ring behind the timing cover

 

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 5:38 pm 
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So when u take the tensioner out it's in the plug with the 2 holes in it ?

 

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Dark Agents,Sunroof, bilstein shocks, 6000k HIDS, 329 mm slotted rotors, twin pot calipers , Climate Control, GarrettT04 turbo,log manifold, crow turbo cam, microtech lt10c, 42lb injectors , 044, surge tank , T56 , rebuilt bottom end , alloy plenum .

Aiming for 300 rwkw

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 6:54 pm 
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No. It's on the front of the block, behind the timing chain cover. Not a small job to get to. Personally, I would try to identify the source of the low oil pressure first. Thicker oil might help - I ran my EF on 20W-50 for years with no issues.

 

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95 EF XR6 wagon, 17" FTRs, DBA, QFM, KYB/Koni, AU block, ported EF head, SS Inductions, Territory intake, MLS gasket, milled, Franklin RH24B cam, Coby headers, no cat, Tickford 2.5", 2800rpm stall, J3 chip

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 7:16 pm 
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Fair enough .
I gave my engine a rev and stuck my head under their, it sounds like the noise is coming from the injectors or lifters.

 

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El XR6 Turbo
Dark Agents,Sunroof, bilstein shocks, 6000k HIDS, 329 mm slotted rotors, twin pot calipers , Climate Control, GarrettT04 turbo,log manifold, crow turbo cam, microtech lt10c, 42lb injectors , 044, surge tank , T56 , rebuilt bottom end , alloy plenum .

Aiming for 300 rwkw

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 7:55 pm 
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Injectors will always make a light high-pitched tick-tick noise, but you shouldn't be able to hear it with the bonnet closed.

The lifters often get noisy on the Ford OHC sixes - they may be due for replacement, or could just be gummed up. I notice you are running a Wade cam. Assuming it's a regrind, you should have an extra shim (or two) in each rocker arm to compensate for the smaller base circle on the cam. If it doesn't have enough shim, it will be noisy forever. What are the cam specs?

Checking for shims is reasonably straightforward and should only take a couple hours (I know some of you guys can do it in no time, but I'm very careful - and slow :oops: ). If you are going to do it, invest $50 or so in a proper repair manual (Haines, Gregory's, etc). It will save you so much time and heartache. The procedure is documented somewhere on Fordmods too - 'Search' is your friend. Two tips:
- plug all the oil drain holes in the head with pieces of rag before taking the rocker gear off; and remove the rags before putting the rocker cover back on.
- loosen and tighten the rocker gear bolts in stages, a little at a time.

 

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95 EF XR6 wagon, 17" FTRs, DBA, QFM, KYB/Koni, AU block, ported EF head, SS Inductions, Territory intake, MLS gasket, milled, Franklin RH24B cam, Coby headers, no cat, Tickford 2.5", 2800rpm stall, J3 chip

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 8:17 pm 
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I had a 977b but it caused the rattle , now I'm running stock cam.
Tbh I'm not even 100% sure what chain rattle sounds like.

The noise I have is more of a fast ticking noise/grinding noise , not a rattle .
I can hear it with the bonnet down . Comes on around 1300-1700 rpm.

 

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El XR6 Turbo
Dark Agents,Sunroof, bilstein shocks, 6000k HIDS, 329 mm slotted rotors, twin pot calipers , Climate Control, GarrettT04 turbo,log manifold, crow turbo cam, microtech lt10c, 42lb injectors , 044, surge tank , T56 , rebuilt bottom end , alloy plenum .

Aiming for 300 rwkw

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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 10:32 pm 
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Like I said, full timing chain kit like 1000ks before cam went in, no chain rattle before cam.
Yea wonder why the low oil pressure, also was thinking, if the timing chain cover gasket is leaking could that cause low pressure at the tentioner?
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 Post subject: Re: Timing chain rattle!
Posted: Wed Sep 21, 2011 10:51 pm 
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87SIlude wrote:
Like I said, full timing chain kit like 1000ks before cam went in, no chain rattle before cam.

Sorry...I didn't read your post properly. :oops:

Have you checked that the tensioner has been released all the way? If you use a Motorcraft oil filter, it seems to flow better than other brands. Also, what grade oil are using?

 

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 Post subject: Re: Timing chain rattle!
Posted: Thu Sep 22, 2011 7:27 am 
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It's ok,
Running a ryco filter and 15/40 valvoline engine armor oil.
I'm positive the tentioner hAs released
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 Post subject: Re: Timing chain rattle!
Posted: Thu Sep 22, 2011 11:37 am 
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Perhaps try using a thicker oil for the time being. I gather you've seen other posts about low oil pressure being caused by worn big end bearings or oil pumps. Then, there's faulty oil pressure switches.

Have you tried running the engine at idle (with the rocker cover off) to see if oil is getting through to the HLAs? The oil galleries for the chain tensioner & rocker assembly are next to each other.

 

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