Cylinder head bolt washers

[antichrist]

Did Rover quit using the head bolt washers, PN 602098, at some point?
My wife's '97 4.0 didn't have any. Or did the last person who had the heads off just not reinstall them?

Is there anything special about them? Any reason I can't just use a high strength thick washer for 30 cents as opposed to the $1.70 for the 602098?

If they are supposed to be used, what's the risk of not? It didn't register that they were maybe missing until I had one of the heads installed.

 

[DarylJ]

>Did Rover quit using the head bolt washers, PN 602098, at some point?

Yes. My '98 doesn't have them, for instance. I think it was quite a bit earlier than that.

>Is there anything special about them? Any reason I can't just use a high strength thick washer for 30 cents as opposed to the $1.70 for the 602098?

Yes and yes. You shouldn't even reuse them unless there is a procedure for that. On Porsches it is sanding one side (the side that will touch the head). If you don't do this it's going to change your torque specs.

But in your case I really doubt it had them to begin with, so you're fine.

 

[jafir]

It looks like they aren't there on the 4.0 but are there on some 3.9L and older. I'm wondering if it has something to do with the different head-bolts used with the metal gaskets on the older engines.

 

[antichrist]

Ok, thanks.
Microcat was not distinguishing by VIN and various parts sites said either "to 1995" or "Discovery 1".
Microcat does list the same head and bolts for the later D1 and DII, but doesn't list the washer for DII's.

 

[DiscoPhoto]

Ok, thanks.
Microcat was not distinguishing by VIN and various parts sites said either "to 1995" or "Discovery 1".
Microcat does list the same head and bolts for the later D1 and DII, but doesn't list the washer for DII's.

I found the opposite, Microcat listed PN 602192 for the DI head bolt, and PN ERR2944 for the DIIs... I could be reading it wrong though.

 

[DiscoPhoto]

Unless I'm mistakingly looking at older DIs.... which is probably the case.

 

[antichrist]

I searched "cross catalog" for one of the head bolts from the D1 section, ERR2944, and clicked the DII result. It shows the head and bolts, but no washers. This is with the 2009 version of Microcat.

 

[seventyfive]

>Did Rover quit using the head bolt washers, PN 602098, at some point?

Yes. My '98 doesn't have them, for instance. I think it was quite a bit earlier than that.

>Is there anything special about them? Any reason I can't just use a high strength thick washer for 30 cents as opposed to the $1.70 for the 602098?

Yes and yes. You shouldn't even reuse them unless there is a procedure for that. On Porsches it is sanding one side (the side that will touch the head). If you don't do this it's going to change your torque specs.

But in your case I really doubt it had them to begin with, so you're fine.

^what he said. we use new washers on porsches, but technically you dont have to. IF you were to use washers i would suggest case hardened so they dont 'squish' over time.

better yet use head studs.

 

[DarylJ]

we use new washers on porsches

I also use new washers on OTHER PEOPLE'S Porsches But I'm a cheap bastard.

 

[listerdiesel]

As per our 'other' conversation, the washers were used up to the end of the 14-bolt head, 3.5 and early 3.9, they were torqued in discrete stages, rather than the 15ft lb and 2 X 90 degree turns on the later engines.

Peter