| The Triumph Dolomite Club - Discussion Forum http://forum.triumphdolomite.co.uk/ |
|
| 1850 Inlet manifold gasket comparison http://forum.triumphdolomite.co.uk/viewtopic.php?t=34160 |
Page 1 of 1 |
| Author: | yorkshire_spam [ Sun Jul 08, 2018 6:02 pm ] |
| Post subject: | 1850 Inlet manifold gasket comparison |
Having had issues getting the water passages to seal when refitting the inlet manifold on Binny (1850 Dolomite) I thought it would be interesting to compare the new blue grey ones against red-ish NOS style ones. The difference in thickness is really quite large... Red-ish NOS ones - 0.0215" (about 22 thou on average) Blue gray ones - 0.065" About 3 times thicker!  
|
|
| Author: | GTS290N [ Sun Jul 08, 2018 7:05 pm ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
It's some years since I bought some. The first were purchased from Rimmer Bros, they were made of very thin paper - I didn't fit them, they just didn't look right. I then bought from TD Fitchett, the gaskets were much thicker. Used them, no issues. |
|
| Author: | Carledo [ Sun Jul 08, 2018 9:09 pm ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
I recently fitted a Rimmers blue manifold gasket to Rich's Sprint. Both head and (Weber) manifold were spotlessly clean and appeared, to all intents and purposes, flat. It leaked like a sieve, as soon as the coolant level reached the joint, without even starting the engine. I had to remove the manifold again and ladle a load of silicone round the water gallery before it would seal and hold running pressure! I wasn't impressed! But i'm at a bit of a loss as to WHY? Is the paper they are using somehow uneven in thickness? Or porous? It doesn't make sense! Steve |
|
| Author: | yorkshire_spam [ Sun Jul 08, 2018 9:20 pm ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
Quote: It leaked like a sieve, as soon as the coolant level reached the joint, without even starting the engine. I had to remove the manifold again and ladle a load of silicone round the water gallery before it would seal and hold running pressure!
Exactly the issue I had the first time I tried to refit the manifold on Binny.I might make enquiries with some gasket companies about getting a batch closer to the original thickness made up. |
|
| Author: | xvivalve [ Sun Jul 08, 2018 10:33 pm ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
Both 1850 and Sprint inlets have in my opinion a missing bolt; ideally they both need another in the bottom right corner to effect a good seal to the water jacket. My thinking is a thicker gasket is able to be compressed by the bolts and should therefore be a better option...EXCEPT in the bottom right hand corner where the missing bolt cannot do its job. A thinner gasket has less compressibility and therefore the manifold gets a more even interface with the head and no leak. |
|
| Author: | Toledo Man [ Mon Jul 09, 2018 6:40 am ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
I fitted one from TD Fitchett a few years back when I swapped the inlet manifold. It hasn't leaked ever since. |
|
| Author: | dollyman [ Mon Jul 09, 2018 9:19 am ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
The redish gaskets were the ones that are in "payen" gasket sets therefore good quality. You to get spurious makes of gasket sets years ago and they would not either  I shudder to think of all the gaskets i have thrown away over the years.Tony. |
|
| Author: | xvivalve [ Mon Jul 09, 2018 9:46 am ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
Reddish = asbestos containing gasket. It was good stuff in so many ways, that asbestos!! |
|
| Author: | yorkshire_spam [ Mon Jul 09, 2018 11:22 am ] |
| Post subject: | Re: 1850 Inlet manifold gasket comparison |
Quote:
Both 1850 and Sprint inlets have in my opinion a missing bolt; ideally they both need another in the bottom right corner to effect a good seal to the water jacket. My thinking is a thicker gasket is able to be compressed by the bolts and should therefore be a better option...EXCEPT in the bottom right hand corner where the missing bolt cannot do its job. A thinner gasket has less compressibility and therefore the manifold gets a more even interface with the head and no leak.
I think the thicker gaskets can also prevent the O ring between the head and the manifold getting sufficient clamp to stop the front waterway leaking into no #1 inlet.I'd like to meet whoever left that long waterway slot in the head at the rear and shake them warmly by the neck! |
|
| Page 1 of 1 | All times are UTC+01:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|