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Thread: Overheating in a Marina Roadster

  1. #1 Overheating in a Marina Roadster 
    frequent forum contributor Club Member stevejgreen's Avatar
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    I was reading with interest the thread in the Sportster section.
    http://www.marlinownersclub.com/foru...p?4716-Louvres

    Marina Roadsters, particularly 1.8's historically have suffered from overheating issues, often discussed on this forum and in Pitstop.
    Even now there are Roadsters that have yet to have louvres in their engine compartment side panels.

    The same company that helped with a Sportster could also help with a Roadster.

    There are several other things that can be done to help a Roadster, all detailed on this forum, but I have tried to collate them all at http://www.keepandshare.com/doc/4039...34-pm-48k?da=y
    Last edited by stevejgreen; 19-01-2014 at 09:00 PM.
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
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  2. #2 Re: Overheating in a Marina Roadster 
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    As a follow-up to Steve's excellent summary of solutions to overheating problems, I can report that after some thorough investigative activities including ignition timing, carb settings and a rebuilt brake master cylinder (all of which were necessary) my 'overheating' has just been solved with a new temperature sender!
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  3. #3 Re: Overheating in a Marina Roadster 
    frequent forum contributor Club Member stevejgreen's Avatar
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    Does that mean I have to amend my document? I know its not listed.
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
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  4. #4 Re: Overheating in a Marina Roadster 
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    I had same problem with apparent overheating when I built my 1275 roadster. Turned out that the 'Marina' sender was incorrect match for the Smiths gauge I used at the time
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  5. #5 Re: Overheating in a Marina Roadster 
    frequent forum contributor neiltechspec's Avatar
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    Put a proper temperature gauge in - a mechanical capillary.

    Mines a 1500 Triumph with a re-cored Toledo rad (1300) & 13" fan on the correct side (engine side) and no mechanical fan, it doesn't overheat.

    Neil.
    Ex owner of a Hybrid Roadster LWB.
    It's now in France somewhere.
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  6. #6 Re: Overheating in a Marina Roadster 
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    Hmmm.. I remember reading about the sensor problem years ago and was encouraged at the prospect of an easy fix. It wasn't. It's the bodywork; even after all my endeavours the car is still tempted to get hot when pushed - I'm considering vents in the bonnet to finally sort it out.
    1984 Marlin Roadster, 1.8 Zetec Black Top, Type 9 box, Griffin Power Systems Injection, Ashley Manifold + stainless exhaust, Omex ECU, Dunnell Alternator, Davies Craig Electric Water Pump & Digital Controller, Raceline Water Rail, K&N Air Filter. Dynod at 150BHP
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  7. #7 Re: Overheating in a Marina Roadster 
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    One of the receipts that came with my 1800 powered Roadster is for a "special" radiator with larger core. I've not had the engine running so don't know if it made any difference by my car hasn't the louvres that others seem to need. Maybe all it takes is such a custom rad with 4 cores instead of normal 3 cores or whatever rad specialists do

    Paul H
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  8. #8 Re: Overheating in a Marina Roadster 
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    Quote Originally Posted by CompoSimmonite View Post
    One of the receipts that came with my 1800 powered Roadster is for a "special" radiator with larger core. I've not had the engine running so don't know if it made any difference by my car hasn't the louvres that others seem to need. Maybe all it takes is such a custom rad with 4 cores instead of normal 3 cores or whatever rad specialists do

    Paul H
    I've got a receipt for several hundred quid for a custom aluminium radiator ;-) Didn't make a fat lot of difference to the re-cored Viva rad I had previously.
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  9. #9 Re: Overheating in a Marina Roadster 
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    Several years ago I replaced the 1.3 'A' series in my Roadster with a 2 litre Alfa DOHC and was mindful of the risk of overheating so I did two things a) had the original Vauxhall (Viva or Chevette, I can't recall which) radiator re-cored and b) fitted a thermostatically controlled electric fan with manual override in front of the rad. I fitted a low temperature switch in the rad so that the fan would come on early rather than late. The engine bay has louvres down the sides only. The car has never overheated and the fan only comes on when stuck in traffic in really hot weather. There are maybe two reasons for this. The engine is virtually all alloy rather than cast iron so probably gets the heat away more efficiently and it has a large finned alloy sump that takes 6 litres of oil. With the 'B' series you can't do anything about the metal it's made of but maybe the addition of an oil cooler would help. Just a thought
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  10. #10 Re: Overheating in a Marina Roadster 
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    I wonder if an oil cooler would help ?
    The Sprite 1275 I'm fitting, in place of the 1800TC, has a cooler so intend keeping it.

    Paul h
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