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[Big_Al]

Al - when I replaced oil cooler i fitted new washers (supplied by Vx) to banjo unions, new dowty type washers (Vx) to coolant bridge as well as new rubber o-rings (Vx) that sit between oil cooler and bottom of plate and seal when 30mm nuts tightened.
I am also aware that the coolant bridge bolts are slightly different to the oil cooler bolts (having fell for this on the Estate after I sheared one of the oil cooler bolts whilst retorquing). The oil cooler pipes were removed at the lower end (19mm crowsfoot) so there was no risk of straining the pipes.  Oil cooler & crank sensor removed to gain access.

I did not replace the two oil cooler bolts - re-used originals.  With hindsight I feel I should have as it is possible one of these may have weakened and stetched ?  All bolts/nuts were torqued to correct torque.

It would be prudent to replace both these bolts together with new washers.  HTH

If a coolant bridge bolt is fitted to the oil cooler you won't get a slight leak it actually pours out, a large pool forming in seconds!!

So the oil cooler bolts are slighlty smaller in length then

I have both pairs from my engine on my kitchen table . have checked all dimensions , holes & bore sizes ,thread lengths  . . both pairs are exactly the same . Only difference is the 2 types of washer fitted.

I have now posted a separate thread to try & find what the difference is . But with both pairs being exactly the same length it would seem one pair are wrongly fitted to my engine

[amba]

Al.

They are quoted as seperate part numbers so I assume they are different but never checked lenghts etc.

When I did mine I replaced both the coolant bridge and Oil cooler banjo bolts as was concerned about them shearing when re-torqued up.
I ordered them from VX in Dartford and they came in seperate bags which I then marked prior to fitting according to there number.

My only conclusion with yours is they are the same length/thread/bore etc because they are ALL either coolant bridge or oil cooler bolts and a previous repair has fitted them possible incorrectly or unaware they differed...that may be part of the reason you have a slight oil leak.

Sure I read somewher a guy from Finland ?? fitted them all the same and couldn,t get 1 set to torque up correctly.
Be interesting to see what the Forum,s opinion is

[Big_Al]

Al.

They are quoted as seperate part numbers so I assume they are different but never checked lenghts etc.

When I did mine I replaced both the coolant bridge and Oil cooler banjo bolts as was concerned about them shearing when re-torqued up.
I ordered them from VX in Dartford and they came in seperate bags which I then marked prior to fitting according to there number.

My only conclusion with yours is they are the same length/thread/bore etc because they are ALL either coolant bridge or oil cooler bolts and a previous repair has fitted them possible incorrectly or unaware they differed...that may be part of the reason you have a slight oil leak.

Sure I read somewher a guy from Finland ?? fitted them all the same and couldn,t get 1 set to torque up correctly.
Be interesting to see what the Forum,s opinion is

Andrew,   have ordered  only new banjo bolts   . .  so if they arrive & are a different length then it will be problem solved & we will know if they should be longer or shorter than the coolant bridge ones .

Bigger problem occurs if they are the same length as the 4 I have taken off.

As you said lets see what the forum turns up .

this is turning into the  "Oil leak from HELL"

[amba]

Al.

I never payed any attention to them when I replaced mine as each bag had 2 bolts in and I labeled them against part number I previously sent over:

90424578 HOLLOW CHANNEL BOLT FOR COOLER RADIATOR


12992646 HOLLOW CHANNEL BOLT FOR COOLER BRIDGE

Fingers crossed for you, mate.

[Big_Al]

Al.

I never payed any attention to them when I replaced mine as each bag had 2 bolts in and I labeled them against part number I previously sent over:

90424578 HOLLOW CHANNEL BOLT FOR COOLER RADIATOR


12992646 HOLLOW CHANNEL BOLT FOR COOLER BRIDGE

Fingers crossed for you, mate.

Thats the number I  have ordered

[amba]

This would be my theory then ,Al.

If you have the correct seals and bolts for the oil cooler then that should fix that leak .

You had NO coolant leak with the bolts you have fitted ..wether they be the right ? or wrong ? parts numbers  ...so with new dowty washer correctly torqued down that also shouldn,t leak.

Jobs a good,n 

[dbug]

Al - when I replaced oil cooler i fitted new washers (supplied by Vx) to banjo unions, new dowty type washers (Vx) to coolant bridge as well as new rubber o-rings (Vx) that sit between oil cooler and bottom of plate and seal when 30mm nuts tightened.
I am also aware that the coolant bridge bolts are slightly different to the oil cooler bolts (having fell for this on the Estate after I sheared one of the oil cooler bolts whilst retorquing). The oil cooler pipes were removed at the lower end (19mm crowsfoot) so there was no risk of straining the pipes.  Oil cooler & crank sensor removed to gain access.

I did not replace the two oil cooler bolts - re-used originals.  With hindsight I feel I should have as it is possible one of these may have weakened and stetched ?  All bolts/nuts were torqued to correct torque.

It would be prudent to replace both these bolts together with new washers.  HTH

If a coolant bridge bolt is fitted to the oil cooler you won't get a slight leak it actually pours out, a large pool forming in seconds!!

So the oil cooler bolts are slighlty smaller in length then 

No the difference is in the amount of thread - a coolant bridge bolt if fitted to oil cooler torques up before clamping the banjo and sealing washers.

Al - the correct bolts were fitted to both oil cooler and coolant bridge by me - fact!  However from my experience on the Elite Estate I suspect these bolts may weaken and stretch when reused (at best or at worst shear as I found out on the Estate.  As I was in a rush I fitted the only new bolt I had which turned out to be a Coolant bridge bolt from the part no to the Estate.  Oil really pi**ed out!  Fitted 2 new oil cooler bolts from Vx - no leaks).  Sure if you fit new correct oil cooler bolts + new sealing washers from Vx and torque correctly result will be no oil leak!

In answer to your other question, suspect oil leak started after I fitted new oil cooler (but not immediately).  I suspected passenger side cam cover, but as oil loss was low (rarely needed topping up) tended to ignore it.  HTH

[Big_Al]

Thanks dbug 

can see it now , thread length. But the difference is so small that you have to really look close to see it.

I would guess that it probably only 1 more turn of thread. I will attempt to count the thread turns with a nut when home from work tonight .

When re-used I  can see the stretching theory would come into play .

[amba]

So looks like we have an answer to the difference in the2 part #,s.

Fingers crossed for you ,Al ,that it ends in smiles...sure it will.

[Marks DTM Calib]

Here is a curved ball for you.

The oil cooler and coolant bridge bolts on the 2.5 and 3.0 are the same....

[dbug]

Here is a curved ball for you.

The oil cooler and coolant bridge bolts on the 2.5 and 3.0 are the same....

No they're not - different part nos for oil cooler bolts and coolant bridge bolts.  Although the same size, they have different thread lengths.

[Big_Al]

Re:   the last 2 posts above  . . . .  Now I really am confused 


Now . .  does Marks DTM  mean that the same 2 types  bolts are used  on both the 2.5  & 3.0 engines ?

Or does he mean either part No. of bolt will do either job (coolant bridge or oil pipe union ) meaning both part No. bolts are identical ?

Been told that if you use coolant bridge bolts on the oil unions you get a very big oil leak ...


This thread is def helping my post count  . . only 30 odd away from a knighthood now 

[dbug]

Believe me Al they are different

can see it now , thread length. But the difference is so small that you have to really look close to see it.

- believe your own eyes!!

[Big_Al]

[quote  ;=dbug link=topic=104501.msg1309833#msg1309833 date=1340758609]
Believe me Al they are different

can see it now , thread length. But the difference is so small that you have to really look close to see it.

- believe your own eyes!!
[/quote]

Booking myself in at Specsavers  . . .   just to make sure 

[Marks DTM Calib]

Here is a curved ball for you.

The oil cooler and coolant bridge bolts on the 2.5 and 3.0 are the same....

No they're not - different part nos for oil cooler bolts and coolant bridge bolts.  Although the same size, they have different thread lengths.

I cna assure you that in as left the factory state, the ones used on the 2.5 and 3.0 are the same.