b569rr
Well-Known Member
The culprit is a broken plunger spring.
Hydraulic roller lifter issues???
- Thread starter b569rr
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The culprit is a broken plunger spring.
The internal lifter spring isn't a "loaded" item. So valve spring pressure should not have affected it. Just poor luck. Why couldn't you remove the valley plate?
Doug
Doug
b569rr
Well-Known Member
I tried beating it backwards but it was stuck, couldn't break the seal. I used a 5 lb hammer too. The Indy heads are larger dimensionally so I have to run a cast aluminum valley cover rather than the pan. The heads extend over the valley by approx 1/2" each side trapping it in. They make a valley cover with a window but it may not fit under the cross ram.
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Mine has -1 heads as well. I agree, it's tough to break the RTV loose, but not impossible. Cut the center of the plate and remove the ribs around the opening Then a fabbed cover will fit under a cross or an Indy 440-25. That's how mine is now.
Doug
Mike Gaines
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b569rr
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I just noticed something yesterday. The receipt that lists the cam, lifters, and valve springs, which was all bought together, shows that my lifters are only good for up to 360 pounds open pressure. I left a message and I'm waiting for a return phone call. Stay tuned
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b569rr
Well-Known Member
I learned a valuable lesson yesterday. Don't assume that a vendor sends you the correct parts. When I ordered my cam, it was selected for me based on my goals. The vendor shipped valve springs and lifters for this cam, as I did not select any part numbers myself. Apparently the lifters that were sent to me were the wrong ones and would never survive per conversation with them. After digging into my paperwork, I could've caught this because the lifters say that they are only rated for 360 pounds valve spring pressure. My springs are 555 pounds open. Case closed. Read your paperwork.
Tom
Tom
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dieseldazzle
Well-Known Member
360 open? Roller cam?
Hell my flat tappet solid calls for 415 open.
Hell my flat tappet solid calls for 415 open.
68 HEMI GTS
Well-Known Member
That's pretty stout pressure on a FT if you do any street driving.
dieseldazzle
Well-Known Member
b569rr
Well-Known Member
Measured for new pushrods this morning and have a valley cover with access. That was dumb not putting that on before.
Anyways I opened up the bad lifter and you can see the bottom of the check valve retainer is partially separated from the plunger. I checked all my geometry before I took it apart with a dummy lifter and rocker height and push rod length are perfect.
Hopefully I'll be back on the road in a few weeks. Keeping the cam that's in it.
Anyways I opened up the bad lifter and you can see the bottom of the check valve retainer is partially separated from the plunger. I checked all my geometry before I took it apart with a dummy lifter and rocker height and push rod length are perfect.
Hopefully I'll be back on the road in a few weeks. Keeping the cam that's in it.
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