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Sopwith_Camel

Sopwith_Camel

Jedi Knight
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Sorry. Bad news. You have vorn out engine.
Syl 1- Good kompresjon 9 bar
Syl 2- Half kompresjon 4.5 bar
Syl 3- Missing kompresjon
Syl 4- Low kompresjon

Rocker arm bushings are vorn out. You had 1.85mm valveclerance at the worst. Normal is 0.305-0.38mm.
You have water in the oil. Gues it is from remowing the head?

One good thing.It has very good sparks.

I am going to remove the head and check the valve seats. If I can`t find somthing there, the engine must out.







 
My sympathies. Hopefully it's just the head.
 
Shaggy evidently is worn out from all of those trips out and about. Too much play time and wild times up there in the Great North.
 
With the head removed, look at the brass plug indicated in the picture below. If it is not flush with the head surface it must be replaced.

picture-1275-head.jpg
 
58Custom said:
With the head removed, look at the brass plug indicated in the picture below. If it is not flush with the head surface it must be replaced.
Click to expand...

Yep... that as my problem as posted (with photos) in this thread: https://www.britishcarforum.com/bcf/showthread.php?85757-Reconditioned-head-proud-papa . I'm troubled, though, by the low compression on #4 too. Either way, pulling the head will reveal a lot. Tom's marked spot will cause cross-fire and compression problems between #2 and #3 (because the plug spans the fire-rings in the gasket).
 
Last edited:
Perhaps leaking head gasket??? Not sure from the post whether the head has been pulled or not. Engine is obviously worn but if the gasket could be the problem you could maybe get by for a little longer.

Kurt.
 
Just thinking you can get a K-series engine (in Britain at least) for peanuts..... if you catch my drift.
 
a buddy of mine has an engine
yes I did the head gasket in the summer and so I bet I bodged it
we will pull the head and look again
so what dose the brass plug control???
steve
 
Boink said:
Yep... that as my problem as posted (with photos) in this thread: https://www.britishcarforum.com/bcf/showthread.php?85757-Reconditioned-head-proud-papa . I'm troubled, though, by the low compression on #4 too. Either way, pulling the head will reveal a lot. Tom's marked spot will cause cross-fire and compression problems between #2 and #3 (because the plug spans the fire-rings in the gasket).
Click to expand...

Well, it will be easy to rework the head to eliminate the brass plug situation. Being unsure of what is the deal with #4, I would be inclined to remove the oil pan and remove the pistons to check the condition of the rings. When I bought my MKIII my engine had a broken ring on each piston but my cylinder walls were surprisingly good and no appreciable ridge. So I ran a ball hone through the cylinders and installed new rings. Three years later my short block is still working great. You can do this with the engine block and crankshaft still installed in the car, just cover the crank well before and clean carefully after. Use new rod bearings if you want.
 
The brass plugs are blanking plugs (with one or two of them with drilled holes for coolant). They are pressed in and can drift inward causing a serious issue if the middle one does this. As Tom indicates, they can be fixed by any good machine-shop, by being replaced with threaded ones.
 
so im now doing a engine rebuild
what should i do for a Cam??
Im just bombing around the mountains with the MG club so I have to keep up with the MGAs,Bs,Fs,
steve

im thinking this one
[h=1]CAMSHAFT 1275-1380cc A PlUS FAST ROAD/ best tested to date[/h]

​
Exchange A Plus cam only--old core must be A plus for refund (£50 + VAT surcharge) We cannot accept cams that have alreday been reground or rusty

Valve clearance should be 0.014" on inlet and 0.016" exhaust. LCA 107 degree

DURATION INLET 264 EXHAUST 268, LIFT INLET 264 EXAUST 289. This camshaft does not really need 1.5 rockers as the lifts are good. Mini Spares and many leading engine tuners in USA use this camshaft in their engines-it is fitted to our half engines ENG001/002/003 because of its great useful torque range and economy.

Also very low on carbon emmissions for that all important MOT. surcharge on cams £50.00

  • Was £53.57 exc vat
  • Was £64.28 inc vat
  • Now £45.53 exc vat
  • Now £54.64 inc vat

[h=3][/h]​

 
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