Leaking Timing Cover Gasket

[rstoddard]

I recently replaced the crankshaft seal and Timing Cover gasket (OEM cork gasket with FIPG) while renewing the HB, but I just noticed some oil leaking from the bottom of the Timing Cover where the two large bolts are. I snugged those bolts up as tight as I dared, as well as the smaller bolts.

Is there anything else I can do? If I continue to see oil am I looking at replacing the gasket or is there any other options? Is putting RTV around the edge a waste of time and effort?

 

[ToyotaMatt]

you did NOT mention replacing the paper / fiber gasket behind the timing gears oiler plate ?
if you did NOT replace this gasket and Apply a skim koat of black FIPG , then this IS the source of your leak ........
i have made this mistake once , and never did again , its part of the big picture job scope being that FULL ON oil pressure flows between the bl;ack face and the oiler nozzle among other passages .....


make sure you use ALL new parts here OEM do NOT re-use a single gasket , seal or o-ring

now oem hardware is exrtra nice makes a excellent seal to



this is straight talk you need to hear , mr. stoddard



matt

 

[middlecalf]

The bottom two bolts need FIPG on their threads, the bolt holes pass into the lower block.

 

[rstoddard]

I put thread sealant on the bolts

 

[middlecalf]

How was the HB shaft, grooved at all? Did you speedysleeve it? Matt’s probably on to something after these simple things addressed.

 

[rstoddard]

you did NOT mention replacing the paper / fiber gasket behind the timing gears oiler plate ?
if you did NOT replace this gasket and Apply a skim koat of black FIPG , then this IS the source of your leak ........
i have made this mistake once , and never did again , its part of the big picture job scope being that FULL ON oil pressure flows between the bl;ack face and the oiler nozzle among other passages .....


make sure you use ALL new parts here OEM do NOT re-use a single gasket , seal or o-ring

now oem hardware is exrtra nice makes a excellent seal to



this is straight talk you need to hear , mr. stoddard



matt

View attachment 3254931



View attachment 3254932


View attachment 3254935​

So that would involve draining the oil and removing the crankshaft and camshaft (press-fit) timing gears, and the plate? Are you saying that is standard procedure when replacing a HB, or just when removing the Timing Cover?

It looks to me like the oil I’m seeing is coming from a saturated cork gasket. You may be right, and if I have to pull the HB again tem I would probably do that, and upgrade the plate screws too.

 

[ToyotaMatt]

NOT the whole crackshaft mr. stoddard

please refer to your 2F FSM , the TAN later one is much better lots of pics


it goes over the whole procedure steps by steps

its a SOLID LONG whole day job for sure , without question , but you can do it , i know your skill-sets by now ....


make dam sure you purchase ALL NEW OEM key ways , there will be
1
on the cam shaft cam gear and


2
on the crank shaft ...do not over look this step and parts !

 

[Steamer]

The front edge of the oil pan is right there also so consider that as well.
EDIT: to be more clear, consider it could be the source of the leak.

 

[rstoddard]

How was the HB shaft, grooved at all? Did you speedysleeve it? Matt’s probably on to something after these simple things.

It was a new HB.
It’s not leaking from the back of the HB (Front of the Timing Cover), it’s leaking at the bottom of the Timing Cover, below the Oiler. To my knowledge, oil always accumulates there.

 

[rstoddard]

The front edge of the oil pan is right there also so consider that as well.

Understood. And there is a very small seepage from there. But this oil is coming from the bottom of the Timing Cover… possibly from behind the Timing Gear plate as Matt suggests.

 

[rstoddard]

NOT the whole crackshaft mr. stoddard

please refer to your 2F FSM , the TAN later one is much better lots of pics


it goes over the whole procedure steps by steps

its a SOLID LONG whole day job for sure , without question , but you can do it , i know your skill-sets by now ....


make dam sure you purchase ALL NEW OEM key ways , there will be
1
on the cam shaft cam gear and


2
on the crank shaft ...do not over look this step and parts !

Not the Crankshaft, but both Timing gears (crankshaft and camshaft). It can be a difficult getting the Camshaft gear off!

I just put a new Key on the Crankshaft. It really has no miles on it. Are you saying replace it? I just hate pulling the HB again since it’s press fit, but you have to what you have to do!

 

[Steamer]

But this oil is coming from the bottom of the Timing Cover… possibly from behind the Timing Gear plate

Ok. As long as you can tell. I just wanted to point out that the front edge of the oil pan just about touches the timing plate and could be tough to tell which is leaking.

 

[Steamer]

It can be a difficult getting the Camshaft gear off!

I could be wrong, but I was under the impression that even if you were able to get the cam gear off, the problem would be getting it back on without pushing the cam back out through the rear welch plug. I believe you’ll have to pull the cam with the gear on it. Which means pulling the rocker assembly, push rods and lifters.

 

[ToyotaMatt]

You remover the crank shaft pulley with a steering wheel type puller SST

Eazy Peezy



Per the 2F FSM you remove the cam gear and shaft as a assy.

this is not as hard as it may sound ,

 

[73FJ40]

On my 73 F engine, I learned after the fact that the crankshaft timing gear DID NOT have to be removed. My front plate had a "teardrop" shaped opening which allowed the plate to be shifted downward and slip over the timing gear once all the fasteners were removed.

Regarding removing the camshaft gear from the camshaft, I recall @cruiseroutfit wrote about his attempt and it wasn't promising.

 

[cruiseroutfit]

On my 73 F engine, I learned after the fact that the crankshaft timing gear DID NOT have to be removed. My front plate had a "teardrop" shaped opening which allowed the plate to be shifted downward and slip over the timing gear once all the fasteners were removed.

Regarding removing the camshaft gear from the camshaft, I recall @cruiseroutfit wrote about his attempt and it wasn't promising.

Don‘t think that was me. I’ve successfully removed and replaced the cam gear in order to R&R the gasket. Removing the clip can damage it, new are avail.

I might add, where applicable, use the superseded late model gasket. It has some sealant tracks built into the gasket.

 

[Steamer]

I’ve successfully removed and replaced the cam gear

With the cam installed? Is there a special trick to that?

 

[cruiseroutfit]

With the cam installed? Is there a special trick to that?

Yes, valve train all installed.

 

[Steamer]

I learned after the fact that the crankshaft timing gear DID NOT have to be removed. My front plate had a "teardrop" shaped opening which allowed the plate to be shifted downward and slip over the timing gear once all the fasteners were removed.

On my 74 F.5 also. I didn't realized that till you mentioned it. I then had a look at a recent photo from when I did my new cam install. Good to know.

 

[rstoddard]

So, the plate can be maneuvered to remove it without removing the cam gear? Has anyone else done that? That’s awesome!