Colonelk
Posted a lot
Posts: 3,742
Club RR Member Number: 83
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Feb 13, 2008 21:32:44 GMT
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SR20DET. Reknowned as being much more reliable than the CA, not very expensive to buy, and is basically a well known swap for the CA so should be relatively easy on the grand scheme of things  Failing that...... 1JZ?  |
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Mike
East Midlands
Posts: 3,387
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Feb 13, 2008 22:42:20 GMT
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ROLLS ROYCE MERLIN.
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roverv8rod
Part of things
the little devil inside :)
Posts: 95
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Feb 14, 2008 11:26:03 GMT
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already tried to spray the inlet manifold with some brake cleaner? could be as simpel as a blown gasket, you know...  if it revs up , when you spray it, there's a leak somewhere. |
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Last Edit: Feb 14, 2008 11:28:46 GMT by roverv8rod
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Feb 14, 2008 12:02:06 GMT
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already tried to spray the inlet manifold with some brake cleaner? could be as simpel as a blown gasket, you know... if it revs up , when you spray it, there's a leak somewhere. no compression on one cylinder only, gaskets are new |
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Feb 14, 2008 16:56:09 GMT
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what about dropping the CA out and bolt in a SR? will run the same gearbox from what I've read and also on the same mounts, I plan to do that if my CA goes.
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Feb 14, 2008 22:10:05 GMT
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what about dropping the CA out and bolt in a SR? will run the same gearbox from what I've read and also on the same mounts, I plan to do that if my CA goes. It must be demoralising to put in that much effort only to have a duff engine, but I think it would be a shame to give up on the modern engine idea now. You're heading towards a unique car now, I think the SR20 idea sounds like a winner. Good luck with it! |
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1989 Peugeot 205. You know, the one that was parked in a ditch on the campsite at RRG'17... the glass is always full. but the ratio of air to water may vary. |
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Feb 14, 2008 23:11:42 GMT
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hmm, I dunno. I might wait till later in the year and have a look at the valves, its just the heads such a pain in the ar5e to put on and off cos of all the modern curse word attached to it!
untill then, i'm just gonna have some BMW based fun!!
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Last Edit: Feb 17, 2008 22:03:41 GMT by gitfarm
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Feb 17, 2008 22:14:25 GMT
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UPDATE...
had one last crack at figuring out whats up with the CA today whilst messing about with the beemer.
wanted to make sure it was a problem in the head, so done something si suggested..
we smashed the inside out of an old spark plug and welded a air hose fitting to it. we then made sure that number three was at TDC, and wound in the make shift plug. fired up the compressor and bled some air into the cylinder. we could hear the air coming out of the inlet, which inicated a problem with the inlet valve. they looked fine when the head was off so we checked the lifters..
took the cam off, so there was no pressure on the lifters and done the test again.. problem solved! so it was a lifter!
replaced the cam, using a cleaned out lifter that we had spare, and the same thing happened again, but not quite as bad! release the pressure off the cam and its fine again. WTF!
any suggestions from ca18det knowledged people??!!
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bstardchild
Club Retro Rides Member
Posts: 14,965
Club RR Member Number: 71
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Feb 18, 2008 12:56:53 GMT
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UPDATE... had one last crack at figuring out whats up with the CA today whilst messing about with the beemer. wanted to make sure it was a problem in the head, so done something si suggested.. we smashed the inside out of an old spark plug and welded a air hose fitting to it. we then made sure that number three was at TDC, and wound in the make shift plug. fired up the compressor and bled some air into the cylinder. we could hear the air coming out of the inlet, which inicated a problem with the inlet valve. they looked fine when the head was off so we checked the lifters.. took the cam off, so there was no pressure on the lifters and done the test again.. problem solved! so it was a lifter! replaced the cam, using a cleaned out lifter that we had spare, and the same thing happened again, but not quite as bad! release the pressure off the cam and its fine again. WTF! any suggestions from ca18det knowledged people??!! I'd have a guess and it's a bit of a wild one (cos I haven't gone back read all of the thread) that either - At some stage the valves have been out and the valves and seats recut and the ends of the valve stems haven't been trimed to suit - as a result you are outside the range of the hydraulic tappets or - The hydraulic tappets haven't been cleaned out properly and the centre is still pumped up so taking up all of the clearance. |
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J.P
Posted a lot
I like to eat ice cream and I really enjoy a nice pair of slacks.
Posts: 1,175
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Feb 18, 2008 13:01:54 GMT
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Glad the fault has been found and something can be done about it! Now get ready for the summer!
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Feb 18, 2008 14:44:15 GMT
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BSTARDCHILD - been doing a bit of research, found some info about taking apart and cleaning the lifters, so gonna give that a go.
i don't think, (as well as hoping!), its a valve seat problem from machining. had pretty much a full service history with the nissan i got it from, and no evidence of the head having been taken off at any stage. also, it wasn't a high mileage engine, and the condition of the rest of the engine is brilliant. heres hoping its just lifters!
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bstardchild
Club Retro Rides Member
Posts: 14,965
Club RR Member Number: 71
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Feb 18, 2008 14:49:54 GMT
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BSTARDCHILD - been doing a bit of research, found some info about taking apart and cleaning the lifters, so gonna give that a go. I don't think, (as well as hoping!), its a valve seat problem from machining. had pretty much a full service history with the nissan I got it from, and no evidence of the head having been taken off at any stage. also, it wasn't a high mileage engine, and the condition of the rest of the engine is brilliant. heres hoping its just lifters! OK - my expertise on lifters is in no way expansive - in fact I only know a couple of types but in both cases the damn things have like an inner and outer section and only when you have cleaned and emptied both will the lifter function properly from an initial un pumped up (ie engine drained head removed and replaced) start One of the reasons it's bad to swap lifters around in a head too |
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B-8-D
Posted a lot
down to one car!!
Posts: 4,038
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Feb 19, 2008 15:19:45 GMT
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I did a bit of measuring at the weekend and the cam is holding off the valve 1.3 mm from its seat..
I measured all the spare lifters at work yesterday and they averaged 22.5 mm with the biggest difference being about 0.3mm in the range!! with some feeling a bit squshy bit most a bit solid tbh..
so I was thinking maybe its valve recession?
valve streatch??
or somebody in the past has recut seats with a angle grinder! lol..
anyways.
had chance today to pull appart a few lifters. after soaking them overnight in cleaner.
they didnt look too mucky but I cleaned them anyway..
put them back together with a liberal ammount of wd40 to coat all surfaces..
after this they feel really smooth and squishy and move a lot more... so.......
back out with the mic and they now close up to around 20.3 minimum....!!
result
that gives 2.2mm clearance on the avreage ive already checked so thats 1mm of play for the lifter to pump up before the valve is open....
that should do it!
day off work tomorrow but should have the reast cleaned by the W/E for my bruv to refit them and recheck........
fingers crossed!!
si
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Last Edit: Feb 19, 2008 15:22:11 GMT by B-8-D
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Feb 19, 2008 16:12:43 GMT
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EXCELLENT! Lets hope this sorts it out.
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bstardchild
Club Retro Rides Member
Posts: 14,965
Club RR Member Number: 71
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Feb 19, 2008 16:15:10 GMT
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I did a bit of measuring at the weekend and the cam is holding off the valve 1.3 mm from its seat.. I measured all the spare lifters at work yesterday and they averaged 22.5 mm with the biggest difference being about 0.3mm in the range!! with some feeling a bit squshy bit most a bit solid tbh.. so I was thinking maybe its valve recession? valve streatch?? or somebody in the past has recut seats with a angle grinder! lol.. anyways. had chance today to pull appart a few lifters. after soaking them overnight in cleaner. they didnt look too mucky but I cleaned them anyway.. put them back together with a liberal ammount of wd40 to coat all surfaces.. after this they feel really smooth and squishy and move a lot more... so....... back out with the mic and they now close up to around 20.3 minimum....!! result that gives 2.2mm clearance on the avreage ive already checked so thats 1mm of play for the lifter to pump up before the valve is open.... that should do it! I reckon that should work fine day off work tomorrow but should have the reast cleaned by the W/E for my bruv to refit them and recheck........ fingers crossed!! si yep - but I reckon you've found the problem over pumped up lifters and cold oil thats a bit thick Just as an aside I have always believed that oil in lifters doesn't tend to get changed - once in there it pretty much stays in it!! |
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Feb 19, 2008 16:37:39 GMT
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its looking like thats the problem, but i don't wanna get my hopes up too much!
i reckon maybe an oil change with a thinner oil prior to priming the engine again?
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Gray
Part of things
Silence isnt golden!!!
Posts: 742
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Love that car.
Making me feel guilty about not getting my finger out with my GLS now.....
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Feb 20, 2008 11:16:24 GMT
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Love that car. Making me feel guilty about not getting my finger out with my GLS now..... pull said finger out, and do it!! ;D was driving behind my mates viva this morn, and he's just got his brand new motorsports on it. looked soo wicked, brought back the mojo for doing mine! have another pic..  vivas rule, end of! |
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Last Edit: Feb 20, 2008 11:28:58 GMT by gitfarm
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