What CVH oil pump...
#1
S2 owner
Thread Starter
What CVH oil pump...
Hi there, I am having a few issues with my rst, the engine has done 3000 miles since it was rebuilt, crank re ground etc. My issue is the engine from cold has 70-80 psi of oil pressure and from cold sounds lovely, but once warm the oil pressure drops to 10-12 psi @ around 95 degrees coolant temp. The engine does not tap but the top end sounds a bit cammy and its annoying me! When I rebuilt the engine I used a pattern part oil pump, now I want to try something better, but I don't know where to go for a decent pump. I've tried loads of different oils to see if that changes things from 5w40 to 10w60 and the pressure when cold increases with the thicker oils but the warm oil pressure is the same.
any ideas?
any ideas?
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comptoncjs2 (29-11-2015)
#5
S2 owner
Thread Starter
I've tried 3 sets of pattern lifters lol! I've got some solids to try in it but I don't know if it will cure it. I rang ford but they wanted Ł100 nearly per hydraulic lifter!
#6
PassionFord Post Troll
You don't fit solid lifters on a hydraulic cam. That will munch the cam. You also shouldn't fit any other lifters once a cam and lifters have bedded in together. So swapping them about as you have will have only damaged the cam.
CVH's are never quiet by modern standards, always a tap here n there from the top end
CVH's are never quiet by modern standards, always a tap here n there from the top end
#7
S2 owner
Thread Starter
The thing is I'm a bit stuck between a rock and a hard place, I don't want to spend Ł400 on another cam kit for the engine to still sound like a ka! lol
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#8
S2 owner
Thread Starter
I have an update for my noisy engine issues! I have bit the bullet and removed the cam to fine the exhaust lobe on cylinder 4 to be worn out and half the size of all the others! not good for a cam that's only done 3000 miles! New cam kits ordered, and now the cars in a thousand pieces for some additional body/chassis work
#12
Always a pleasure!
Sadly this is a common story with CVH cam's these days, what kit have you bought now? Newman are the best available IME.
As mentioned above flush out your engine to get rid of any swarf left from that lobe, new oil and filter of course too.
10-12psi is a bit low for a new engine but only a little, as you've had a lobe break up it would be worth inspecting your bottom end shells too.
As mentioned above flush out your engine to get rid of any swarf left from that lobe, new oil and filter of course too.
10-12psi is a bit low for a new engine but only a little, as you've had a lobe break up it would be worth inspecting your bottom end shells too.
#13
S2 owner
Thread Starter
I have gone for a Kent 34 complete kit with springs lifters etc, I had the sump off over the Christmas break and checked everything the shells all look good but the oil pump pick up had sucked up a lot of crud/bits of cam. I've ran the cam in as per Kent's instructions which was fun running a rst at over 2500 rpm stationary for 20 minutes! got a little hot but not too bad. The engine sounds a lot happier now, albeit still a little bit chattery from the lifters but 99% better than it was, its also comes on boost a lot quicker which is good! the oil pressure is also much better, 15-20psi hot idle but a massive difference under load, 3000 rpm is 45-50psi as opposed to about 30psi before! just the brakes to do now as they are terrible!
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