Sump gasket

[Billy]

I'm trying to sort an oil leak at the moment, thought it was the rear crank seal, but I'm fairly sure it's not that or the seal around it but this one just below, the sump gasket, however after removing the bell housing from back of engine extends into this large bit of rubber with two bolts with lock nuts protruding beneath, I've not seen one like this before are the two bolts underneath there to push the rubber against the bottom of the block to create a seal? Or should I just drop the sump off and instant gasket it ?

[Billy]

Forgot the pictures!

 

 

 

[Goaty]

What is it off?

[Billy]

It's a chipper, perkins engine

[Billy]

[cornish wood burner]

It's a while ago now since I rebuilt my last Perkins, but doesn't those rubber strips bridge the edge of the main bearing cap and the block.

Either way I would drop the sump and renew the gasket and rubbers which will almost certainly have hardened. Instant gasket is a last resort bodge.

[Billy]

It's a while ago now since I rebuilt my last Perkins, but doesn't those rubber strips bridge the edge of the main bearing cap and the block.

Either way I would drop the sump and renew the gasket and rubbers which will almost certainly have hardened. Instant gasket is a last resort bodge.

 

 

The engine was rebuilt about 9 months ago, I fear they may have re used a few bits along the way leading to this.

The rubber pictured just seems to fill a void at the back of the sump and sea it to the block, the main appears to be captive in a 2 piece shell just above the bottom of the block. However, I've not removed the sump yet. What do the bolts do that sit under the rubber? Do they adjust it as they were particularly tight ?

[cornish wood burner]

The engine was rebuilt about 9 months ago, I fear they may have re used a few bits along the way leading to this.

The rubber pictured just seems to fill a void at the back of the sump and sea it to the block, the main appears to be captive in a 2 piece shell just above the bottom of the block. However, I've not removed the sump yet. What do the bolts do that sit under the rubber? Do they adjust it as they were particularly tight ?

 

If they have reused those rubbers then almost certainly that's your problem. I seem to remember that those two bolts go through the main cap into the block and help compress the rubbers. Bear in mind it was about 30 years ago and apologies if I have it wrong but the design seems similar to the Perkins I used to work on.

[Billy]

If they have reused those rubbers then almost certainly that's your problem. I seem to remember that those two bolts go through the main cap into the block and help compress the rubbers. Bear in mind it was about 30 years ago and apologies if I have it wrong but the design seems similar to the Perkins I used to work on.

 

 

It's a 99 machine so could be a similar design.

[cornish wood burner]

It's a 99 machine so could be a similar design.

 

Might be a separate piece sitting below and behind the main thinking back but those rubbers need to be flexible to seal the joint so should be renewed when the engine is rebuilt. Maybe they knew that which is why they tightened them so much?