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Rocker cover vented https://www.ausmini.com/forums/viewtopic.php?f=2&t=96882 |
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Author: | Tomtax [ Sun Feb 25, 2018 5:43 pm ] |
Post subject: | Rocker cover vented |
Hi all I purchased my Mk 1 S with an alloy rocker cover with a vent pipe near the filler cap connected to the airbox. I was looking to replace it with a tin one but am puzzled as to whether I need a vent pipe. I am aware of the cut outs for the head bolts so do I search for one with the cut outs and a vent pipe? Maybe someone out there has the one I need that they are happy to sell? I go to various show and shines and talk to mini owners and walk away further puzzled but I guess that part of the intrigue of minis. Thanks in advance. |
Author: | timmy201 [ Sun Feb 25, 2018 5:50 pm ] |
Post subject: | Re: Rocker cover vented |
Have a look through the photos on here, the rocker covers were plain tin with no breather. The breather from the tappet cover went to the PCV http://classicregister.com/id-pages/how ... oper-s-mk1 |
Author: | gtogreen1969 [ Sun Feb 25, 2018 6:46 pm ] |
Post subject: | Re: Rocker cover vented |
Here is a period photo from a 1967 S that I like to refer to. They never vented to the airbox. Rocker cover had no vent pipe. Attachment: 1967 MK1 S engine.jpg The MK1 S had 2 types of rocker covers. The first had a riveted Morris and Patents plate from 1965 to 1966. Attachment: 1965 - 1966 MK1 S Rocker Cover.jpg The second had the Morris and Hot run tested stickers from 1967 to 1969. I am not 100% of the exact change over. Attachment: 1966 - 1969 MK1 S Rocker Cover.jpg
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Author: | Tomtax [ Sun Feb 25, 2018 7:12 pm ] |
Post subject: | Re: Rocker cover vented |
Thanks GTO you are always a wealth of knowledge. You can see the blank behind the oil filler on both rockers which is where my pipe is on the alloy cover. I know now what to look for- just hate the alloy. Thank you again |
Author: | gtogreen1969 [ Sun Feb 25, 2018 7:37 pm ] |
Post subject: | Re: Rocker cover vented |
Tomtax wrote: Thanks GTO you are always a wealth of knowledge. You can see the blank behind the oil filler on both rockers which is where my pipe is on the alloy cover. I know now what to look for- just hate the alloy. Thank you again The 1970 MK2 S had the same except they used just one Hot run sticker at the front. So it doesn't matter which one you use if you are going to respray and re-sticker it. Here is a photo borrowed from Winabbey. Attachment: 1970 MK2 S Rocker Covers.jpg One thing to look out for is the embossed Mowog Aussie map. They were only fitted to Aussie motors - not the Cooper S. My car has this type fitted by the previous owner and I have been too lazy to change it. Attachment: Non S Rocker Cover.jpg
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Author: | Scoop [ Sun Feb 25, 2018 8:07 pm ] |
Post subject: | Re: Rocker cover vented |
Did the Clubman Gt have the same as the Mk2? |
Author: | gtogreen1969 [ Sun Feb 25, 2018 8:18 pm ] |
Post subject: | Re: Rocker cover vented |
Scoop wrote: Did the Clubman Gt have the same as the Mk2? I am not an expert on the GT so maybe someone else will jump in. I believe the early GT engines had the same as the MK2 S and the later GT engines had the embossed Mowog Aussie Map. Here are photos of 2 early and 1 late and you can just make out the embossed rocker cover on the late one. Attachment: Early Clubman GT engine.jpg Attachment: Early Clubman GT engine bay B&W.jpg Attachment: Late Clubman GT crash test 1206 engine.jpg
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Author: | Mick [ Sun Feb 25, 2018 10:02 pm ] |
Post subject: | Re: Rocker cover vented |
The rocker cover you are after without the breather came with the British built engines. like the Cooper S and 998 Auto. They each had a PCV, so didn't need a rocker cover breather. They differ only slightly from each other with the clearance for the extra bolts on the Cooper S. It can be simple enough to find a 998 Auto rocker cover and file the reliefs yourself for the head nut/bolt. Its only a small crescent filed for each. https://www.ebay.ie/itm/CLASSIC-MINI-10 ... 1a439d74eb |
Author: | FNQ [ Mon Feb 26, 2018 8:11 am ] |
Post subject: | Re: Rocker cover vented |
On the NO breather rocker covers, was the oil filler cap vented?. Is there any correlation to vented /unvented caps and the rest of the breathing arrangements? Also to Tomtax, your original question regarding changing,,,, are you looking at: need ( eg 1.5 RRockers won't fit under existing) Being period authentic simply preference or performance, as i daresay the answers could be different . cheers |
Author: | drmini in aust [ Mon Feb 26, 2018 9:11 am ] |
Post subject: | Re: Rocker cover vented |
Yes the cars with PCV valve or carb vac ports ran the breather cap. But a sealed cap worked fine on my 1412 stroker. |
Author: | miniron [ Mon Feb 26, 2018 11:27 am ] |
Post subject: | Re: Rocker cover vented |
You don't really need a vented cap or rocker cover when you have a CCV valve/system. Virtually all modern engines have a CCV system and the engine is sealed - ie no external breathers. They rely on air being drawn into the engine past the crankshaft oil seals for the CCV system. It also helps minimize oil leaks from the seals. RonR |
Author: | Bill B [ Mon Feb 26, 2018 2:38 pm ] |
Post subject: | Re: Rocker cover vented |
A hijack question re. rocker covers: Was a thick spacer washer always fitted between the rocker cover cap nut and the cup washer that covered the rubber grommet? |
Author: | DavidE [ Mon Feb 26, 2018 4:28 pm ] |
Post subject: | Re: Rocker cover vented |
Bill B wrote: A hijack question re. rocker covers: Was a thick spacer washer always fitted between the rocker cover cap nut and the cup washer that covered the rubber grommet? Yes, AFAIK, Bill. |
Author: | Tomtax [ Mon Feb 26, 2018 5:34 pm ] |
Post subject: | Re: Rocker cover vented |
To FNQ Yes just after period authentic. I just have a preference for unmolested mini's. Mind you what is really authentic is always questionable given the lack of Mini records. Regards Tom |
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