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| SABB valve job |
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| AdeV:
Stuart, This is a diesel engine with a cast iron head... It's possible that I could buy an off-the-shelf insert that would fit, but it wouldn't be descibed as a "SABB 'G' 10HP exhaust valve seat"... because the engine obviously doesn't normally use inserted seats. Cheers, Ade. |
| Warrenm:
Most replacement valve seats are just a square section ring. You cut the head to suit with an "interference" fit, press the insert in, then cut the valve seat using normal seat cutters using the valve guide as the centre. http://www.5min.com/Video/Valve-Seats-Insertion-39413661 |
| Divided he ad:
Hi Ade, I've still got 1 inlet and 1 exhaust valve seat insert from my days re-manufacturing landrovers. If you measure the valve and the internal of it's seat I'll see if either will do the job for you? All you do is machine a recess into the head and knock them in, interference style! Worth a measure? Looks like you're going to be having some fun though :dremel: Ralph, |
| AdeV:
Hi Ralph, The diameter of the valve head is 35.97mm (1.416"). The throat dia, as best I can measure it, is 30.97mm at its narrowest point, but it opens out again to 33.33mm (as best I can tell) about 1/4" in. The biggest hassle I can foresee is the port slopes away from the valve seat very rapidly, on one edge; so there's not a lot of meat for a seat to dig into, on one side. It would, I think, have to be quite a shallow seat. Dunno... I'm going to take it to Bogs this w/e for his considered opinion. |
| doubleboost:
I have had valve seats fitted in to mini cooper s heads the head was machined then a seat machined to be a shrink fit the head was warmed up and the seat cooled (very cold ) then pressed in As far as i can remember non ever fell out The bloke that did them gave a guarantee (if it falls out you can have your money back) He did not like doing them and only did them for people who were prepared to take the risk On a low reving under stressed marine diesel you should have no problems |
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