Page 30 of 43 FirstFirst ... 20282930313240 ... LastLast
Results 291 to 300 of 425

Thread: Phill's Nova Project finally begins

  1. #291
    Senior Member
    Join Date
    Mar 2009
    Location
    East Riding
    Posts
    747
    Quote Originally Posted by MicksRedNova View Post
    I'm with Martin here. I think there is a solenoid valve problem related to the lack of hold down pressure and 'drops like a stone' closing cycle, which reminds me of the white Nova owned by Paul & Matt that came to Carfest North in 2012. They didn't even power the pump down just powered the down solenoid and the roof closed in about 2 seconds, like a mouse trap closing .

    I assume your pump is plumbed in the normal way? See diagram in Modification manual.

    Mick
    I agree with this as well, generally without a restrictor you get a very jerky roof close as the weight of the roof tries to force fluid into the pump faster than it can deal with it. It does sound like your valve seals are letting the oil pass.

    Dirk

  2. #292
    Has anybody consider electric rams? I know bushboy has a pair on his. I have slow weep on my return hose but looking to replace with electric rams.
    Cheers

    Ryan


  3. #293
    On reflection, I think there must be a fault with one or both of the pump solenoids. Before I discovered my changeover relay was faulty, my roof was still opening (albeit under great strain) even though the solenoids were actually closed when the pump was running. This implies the fluid is getting past a closed solenoid and would therefore explain the inability to hold a negative pressure. So perhaps it's not the rams after all? Still not sure if this explains the fast closing however?
    "The most beautiful kit car in the world - Motor"

    http://stores.lulu.com/rightsigns

  4. #294
    ***Euro-Nova Supporter***
    Join Date
    Apr 2010
    Location
    Bicester Oxon
    Posts
    342
    the down speed of the roof almost looks like there is no resistance to the weight of the roof; have you tried disconnecting the rams from the hinges and then seeing if they operate properly in both directions without the weight of the roof having any effect? I assume the rams would / should operate in both directions just by the pump - although without the weight of the roof, they may close what seems to be normally in any case. Not sure, but might be something to check?

  5. #295
    Quote Originally Posted by JONESY25 View Post
    Has anybody consider electric rams? I know bushboy has a pair on his. I have slow weep on my return hose but looking to replace with electric rams.
    I'm doing electric on one of my builds on the Sterling Site.

    http://www.sterlingkitcars.com/membe...068-build.html

  6. #296
    I Decided to try again to get the engine running. Re-checked the compressions but (as I already knew) there was zero compression on one cylinder and very little on the other three. No other option then but to pull the engine out and begin a strip down to find out what is wrong. (It took longer to remove the rear valance than it did to take the engine out).

    I hope to make some progress this weekend - at least establish what's wrong with it to decide my next course of action.


    20170714_212545[1].jpg
    "The most beautiful kit car in the world - Motor"

    http://stores.lulu.com/rightsigns

  7. #297
    Senior Member BlueNova's Avatar
    Join Date
    Apr 2015
    Location
    St Andrews, Scotland
    Posts
    397
    That's a shame about the compressions Phill, coz the engine looks pretty tidy on the outside .... best of luck with it! Alistair

  8. #298
    Spent the day stripping down the engine to discover (as I hoped) that the piston rings were all gummed up and stuck in their grooves. Apart from that the pistons and bores look quite healthy so I'm pretty sure a new set of rings will restore compression. However, I am tempted to fit an upgraded set of pistons and barrels to increase the CC to 1600 (the engine is a 1300 twinport) though I'm not sure if I can do this without changing the heads too? Can anyone advise?

    20170715_171241[1].jpg
    "The most beautiful kit car in the world - Motor"

    http://stores.lulu.com/rightsigns

  9. #299
    Senior Member BlueNova's Avatar
    Join Date
    Apr 2015
    Location
    St Andrews, Scotland
    Posts
    397
    That's great news Phill. Fraid I don't know the answer to your question about the heads, but do you know if they already have hardened valve seats for unleaded petrol? If not, you'd be as well getting that done too. Great progress! Alistair

  10. #300
    Well after a bit of research I discovered the 1600cc barrels would fit the crankcase but the heads would need to be modified to accept the wider diameter barrels. Decided to simply replace the rings with a fresh set to try and get my engine running.

    Finished putting it all back together again today.

    Next step is to fit the engine back into the car and see if it works. Fingers crossed.

    Engine with heads, barrels and pistons removed ready for new rings
    IMG_7165[1].jpg

    Halfway through re-assembly
    IMG_7166[1].jpg

    Finished and ready to go back in the car
    IMG_7169[1].jpg
    Last edited by Phill; 23-07-2017 at 04:07 PM.
    "The most beautiful kit car in the world - Motor"

    http://stores.lulu.com/rightsigns

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •