Spin on filters

[Trumpy]

Hi all , 

last time I serviced my 5 I went up market and used a K&N filter , sucked in by terms such as ‘high flow’ ,  ‘high capacity’ and the anti syphon valve . 
Ever since then I’ve noticed a slight leak around the filter .  
Last night I removed the filter , checked the seals and mounting face . All seemed good . Filter re fitted and still leaking . 
Swapped the filter for a cheapo(  £6) from Rimmer and no leak . 
Has anyone had a problem with K&N ? 
My concern now is that the Rimmer filter (QFL0099) seems small for a big engine! 
Is there a good alternative? 
D 

[RogerH]

The small filters work very well. Stick with them.

 

Roger

[Trumpy]

Thanks Roger , 

And that’s the easy option so I’ll stick with that . 
 

[OldBob]

On 11/28/2024 at 1:56 PM, Trumpy said:

Thanks Roger , 

And that’s the easy option so I’ll stick with that . 
 

I usually fit long can filters, then I tried a Borg&Beck short can spin-on as a temporary measure and found the oil pressure went down very slightly. It then went lower still over 1500 miles to the point of being a concern.

Refitted a different short can (Mann)  as again it was what I had to hand,  oil pressure came straight back to normal. No leaks on either.

Guess there's good and bad out there so important to note oil pressure before / after a change and watch its progress.

Bob

[yardman]

mann are one of the best filters manufactures out there also produces oe filter's 

[Trumpy]

The potential restriction from a smaller filter and subsequent loss of oil pressure and flow was my main concern .  Hence i used the K&N last time the oil was changed. A more expensive filter , which has only been problematic because it refuses to seal against the spin on flange .    

Had a 50mile run out on Saturday with no noticeable difference in pressure with the short filter, and no oil leak !  Well not from the filter anyway  

[Andy Moltu]

I tend to use Mann W719/5 on the TRs & Stag. They are long but don’t dip below the chassis.

Mann tend to be pretty good quality.

 

[trchris]

I also use Mann W719/5 get them from euro car parts couple at a time when needed a lot cheaper than the normal supplier’s 

Chris

[Trumpy]

Having now run my 5 for a while with the small QFL0099 filter I haven’t noticed any reduction in oil pressure,  although the air temp has been pretty low so the oil temp  probably hasn’t peaked . 
But what is very noticeable is the delay in pressure showing upon start up . 
With the K&N filter with the anti syphon valve pressure appeared in about 1 second after start up . So almost instantly. 
With the current smaller filter it takes about 3 seconds which seems like an eternity waiting for the light to go out . 
The oil cooler no doubt contributes to this ! 
I’ll certainly go back to a filter with an anti syphon valve when I change the oil . 
Maybe try a Mann W719/5 (as recommended) as the K&N refused to seal . 
 

[stuart]

50 minutes ago, Trumpy said:

Having now run my 5 for a while with the small QFL0099 filter I haven’t noticed any reduction in oil pressure,  although the air temp has been pretty low so the oil temp  probably hasn’t peaked . 
But what is very noticeable is the delay in pressure showing upon start up . 
With the K&N filter with the anti syphon valve pressure appeared in about 1 second after start up . So almost instantly. 
With the current smaller filter it takes about 3 seconds which seems like an eternity waiting for the light to go out . 
The oil cooler no doubt contributes to this ! 
I’ll certainly go back to a filter with an anti syphon valve when I change the oil . 
Maybe try a Mann W719/5 (as recommended) as the K&N refused to seal . 
 

FWIW. When fitted in the downward position the anti drain back valve wouldnt actually be doing anything, thats for the modern engines that have the filter facing upwards often on the top side of the engine.

Stuart.

[Trumpy]

That makes perfect sense and looking at the pipe work to the cooler I can’t see how oil syphons back , although surely the pump can still drain back from the filter if oil can back flow . 
 

[stuart]

1 hour ago, Trumpy said:

That makes perfect sense and looking at the pipe work to the cooler I can’t see how oil syphons back , although surely the pump can still drain back from the filter if oil can back flow . 
 

Not out of the filter itself as it cant run uphill

Stuart.

[Ralph Whitaker]

19 hours ago, Trumpy said:

Having now run my 5 for a while with the small QFL0099 filter I haven’t noticed any reduction in oil pressure,  although the air temp has been pretty low so the oil temp  probably hasn’t peaked . 
But what is very noticeable is the delay in pressure showing upon start up . 
With the K&N filter with the anti syphon valve pressure appeared in about 1 second after start up . So almost instantly. 
With the current smaller filter it takes about 3 seconds which seems like an eternity waiting for the light to go out . 
The oil cooler no doubt contributes to this ! 
I’ll certainly go back to a filter with an anti syphon valve when I change the oil . 
Maybe try a Mann W719/5 (as recommended) as the K&N refused to seal . 
 

This has always been a problem with the 6 cyl engine, even with the spin on filter conversion and the filter hanging down. There is a large cavity at the back of the conversion where it bolts to the block and this will empty of oil when parked even if the filter itself doesn`t.  Had it with my Vitesse even without an oil cooler. I used to spin the engine over without choke until I saw the oil gauge start to rise, then pull the choke to start. I also used to try keep the revs down until the oil gauge was showing full pressure.  Rattly big ends on starting were common back in the day when the 2000s and 2.5s were still everyday motors.

Ralph

[stuart]

1 hour ago, Ralph Whitaker said:

  Rattly big ends on starting were common back in the day when the 2000s and 2.5s were still everyday motors.

Ralph

Yes but that was with the original side mounted round filter that would obviously drain back. There wasnt a spin on conversion available back then.

Stuart.

[Ralph Whitaker]

20 hours ago, stuart said:

Yes but that was with the original side mounted round filter that would obviously drain back. There wasnt a spin on conversion available back then.

Stuart.

I appreciate that, but the point I was making was that it was always the weak spot on the 6s, and from my own experience even with a spin on filter conversion, which admittedly stops the filter draining, there is still a large volume of oilways to fill on start up in the galleries and the area inside the conversion head itself. Hence my softly softly approach to starting the engine when cold, don`t just turn the key and then rev the nuts off it as soon as it fires, even with the conversion give the pump time to reach pressure first.

It makes me cringe now, but in the late seventies we used to go to Newton Abbot every Friday banger racing, and THE car to have was a Triumph 2000. Every body used them and my mate always had half a dozen in his yard waiting for their turn around the track, usually flat out in second gear all the time.

Ralph

[Ian Vincent]

My 4-pot has a spin on conversion and I use K&N filters but I am very careful when starting, particularly if it hasn’t been a while because of the lag while the oil pressure builds. 

Rgds Ian