Ch-Ch-Ch-Changes

[Suffolk944]

Well few weeks ago discovered the my current '44 had a rather big engine problem namely a lousy compression in cylinder number 4 (just 90 psi) so we were talking scored cylinder bore and rebuild with all the cost implications of that.

To be honest didnt much fancy that sort of outlay just to get her back to a level which I had been hoping to improve upon considerably so have spent the time in between agonising over what to do, whether to rebuild/replace the engine or to move onto another car (Porsche or otherwise)with the money I had previously gathered up to mod her further.

In the end I decided on a new car but found I couldn't tear myself away from the 951 so on Saturday I went to see David Mallings car and ended up loving it so much I stuck a deposit down and will be picking it up all things being equal next Saturday in time for Frontrunners [8D]. Am really excited about it I think its a great car and I still have money leftover to apply to it too. This is her...

http://www.porscheclubgbforum.com/tm.asp?m=341854

Of course that still leaves me with the dilemma of what to do with my current car. I had thought about getting a second hand engine (not too expensive relatively) and getting in transplanted (very expensive with labour costs). I guess I could do it and hope to recoup the monies when its done when I sell her on ,though that would be a bit of a gamble hoping she sells quick so that I dont end up with a big bill I need to fund somehow.

Alternatively I could sell her for parts which would be gutting and such a waste as her bodywork, interior and the rest of the mechanicals are in very good shape.

Or is there someone out there out who is good with spanners who could do the engine transplant themselves and fancy getting hold of a turbo at a bargain price ?? If so please give me a shout !!

Any ideas anyone ?

 

[pauljmcnulty]

Great to see Dave's car go to an enthusiast!

Sorry to hear about yours, sounds like a good project for someone though.

 

[Davyboy]

Money left over!...can't have charged enough [8D]

MOT'd the old girl today......it even has new front winsdcreen wipers.

 

[Suffolk944]

MOT'd the old girl today......it even has new front winsdcreen wipers.

Well they will come in handy in the snowstorms on the way to Frontrunners []

 

[peanut]

if the compression is that low it is unlikely to be rings alone. It is more likely to be a valve.This is a lot easier to fix .
If you were losing significant compression via the rings you would get exhaust gases pressurizing the sump and thats very easy to diagnose.
The only way you could lose about 70+ lbs in a cylinder is valve blowby Even without any rings fitted you should get more compression than 90lbs I should have thought

I would take it to a garage where they know what they are talking about and can do the proper tests to establish the problem.
I have got a £5 on it being a valve unless a piston has a hole in it.
I have tried to find the compression figures and the only reference I can find gives approx 165lbs per cylinder

To do a compression test you should remove all plugs and turn the engine over at least 5 times per cylinder preferably 10x and the same for each bore.

worn or broken rings and scored bores should still give a reading of as much as 125lbs

 

[DivineE]

If you email me your mob no. I will give it to a friend of mine, he's just about to finish building a 911 3.2 he's built from scratch (beautiful job too) and was wondering what he could buy do play with next. He's a big fan of the old 44.

Regards,

Ben

 

[morris944s2john]

Yes, i think its a valve too, dont scrap a nice car just because of a burnt valve! If I didnt allready have too much to do on cars, I'd take it and re-build.

 

[Hilux]

Do a compression test with some light oil in the bores ie; the oil seals around the rings as they are lowest area., if it raises the pressure a lot its rings, if it doesnt its valves.