'91 Ford Tempo Engine Knock

1991 FORD TEMPO

2WD • AUTOMATIC

DAMEKC

MEMBER
1 POST

I have a '91 Ford Tempo that I recently replaced the oil pan on. It ran fine for a day or so then started knocking. It's a pretty steady knock. Checked the oil level and it was still full, no leaks. I put some Lucas oil additive in to see if that would help, no luck. Any help would be appreciated.

Jul 3, 2011 at 9:32 PM

CJ MEDEVAC

✓Experienced Mechanic
11,004 POSTS

Is it really a "Knock", usually low in the engine, or could it be "tapping", up high, like the rocker arms?

Check your oil pressure with a mechanical gauge

It Possible, you left something in the pan?

Use way too much silicone gasket?

Did you fight the pan off, maybe damage the pick-up?

Just throwin' stuff.....You never know!

The Medic

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Jul 3, 2011 at 10:00 PM

MHPAUTOS

✓Experienced Mechanic
31,937 POSTS

I would be checking the oil pressure with a mechanical gauge as well, there may be come carbon deposits or sealant fouling the pressure relief valve, was there a lot of sludge in the pan?

Jul 3, 2011 at 10:30 PM

CJ MEDEVAC

✓Experienced Mechanic
11,004 POSTS

mhpautos,

My CJ 5 Rear Output shaft housing, on my transfer case, which is lubricated by gear oil slinging into the hole.....Failed, due to a previous repair, before I got him.

The feller must have used the entire tube of silicone to install the covers.

It had been lying in the bottom for years. When I removed the transfer case to rebuild the tranny, then re-installed all. It must have broken loose, It plugged the 2 oil holes, into the housing. I not only destroyed the housing and shaft, but at 55 MPH, when it locked down, it torqued big-time and busted the case too!

Needless to say, but I was not happy.

I really STRESS the "EZ with the silicone" to everybody now!

I appreciate you, joining in and throwin' out additional info that I missed, that might very well fix this issue!

You are graciously welcomed to help me anytime!

The Medic

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Jul 3, 2011 at 11:01 PM

FIXITMR

✓Experienced Mechanic
9,990 POSTS

first, why did you change the pan? and does the knock change at all with acceleration? foot on or off gas, in or out of gear?

Jul 7, 2011 at 8:35 PM

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