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bowtie44s Newbie
Joined: 13 May 2012 Posts: 16
772.34 points
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Posted: Tue May 15, 2012 10:50 pm Post subject: |
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Block is untouched. Melling hv77 is the only oil mod. It carries good oil pressure with 5w30 conventional.
I soaked the lifters for 24 hrs, lubed the bottoms and dropped them in. I found 0 lash and went another 1/2 turn. Yes I was on the base of the cam. Put the intake on, prime the pump for about 2 minutes (gauge said something like 55psi) dropped in the distributor rolled the engine and it sounded like there were no spark plugs in it.
When I tighten the rocker the plunger doesn't budge, it just opens the valve. The exhaust opens the valves at first but it quickly bleeds back down and the valve closes. I can NOT push the plunger with a push rod, shouldn't I be able to? I replaced the lifters when the cam was still new and they did the same thing. I have stock pushrods and rockers. I know how to check roller rockers and it's a bit more vague on stamped rockers if you use the same method but they look fine. I am going to put in full roller rockers to eliminate that question and I'll get more consistent lift and less friction to boot.
I am out of ideas, I'm about to send that cam to the scrap pile and start over but I'm sure I'll have the same problem. There is obviously something wrong, I just cant find what. The pushrods, guide plates and rockers all look fine, what else could it be? I don't know much about hydraulic lifters, what could cause them to fill clear full of oil and not let it back out? I have tried edelbrock and comp cams lifters. |
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Paul P Member

Joined: 15 Aug 2002 Posts: 2454 Location: Townsend, Mass. 83266.64 points
1971 Chevrolet Chevelle
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Posted: Wed May 16, 2012 9:05 am Post subject: |
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Swap the intake and exhaust lifters and do the same test.
See if the problem stays with the intake or moves to the exhaust lifters. _________________ 2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N/A
6.59@104.03 MPH 1/8mi
10.40@127.73 MPH 1/4mi
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bowtie44s Newbie
Joined: 13 May 2012 Posts: 16
772.34 points
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Posted: Wed May 16, 2012 12:04 pm Post subject: |
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I hate to move the lifters from the lobe they have been on since The cam is already broke in. I am going to take one out and drain the oil out and set the valve then prime the pump. If that doesn't work I'll try it. |
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Paul P Member

Joined: 15 Aug 2002 Posts: 2454 Location: Townsend, Mass. 83266.64 points
1971 Chevrolet Chevelle
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Posted: Wed May 16, 2012 12:33 pm Post subject: |
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Just do a prime and hand crank test _________________ 2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N/A
6.59@104.03 MPH 1/8mi
10.40@127.73 MPH 1/4mi
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Big Dave Moderator

Joined: 04 Dec 2005 Posts: 2663 Location: Tampa Florida 120538.84 points
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Posted: Thu May 17, 2012 7:37 pm Post subject: |
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Opps! Left out the bit about the bench vice when talking about using a 1/4 inch drive rachet socket to compress the lifter. Line them up in a six inch vise and crank it closed. Just don't strain as the oil will come out at a fixed rate of speed.
Big Dave |
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William Jones Member

Joined: 30 Jan 2006 Posts: 826 Location: Lake city, FL 28640.90 points
1971 Ford Mustang
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Posted: Thu May 17, 2012 7:41 pm Post subject: |
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Have you checked the part# on the lifters is it possible they sent you solid lifters?
Bam _________________ Take the horse out off the barn and let her RUN BABY RUN!!!!!
92 LX 454ci Clevor 9.24@142.53 N/A
71 Mach1 454ci Clevor 10.16@134 N/A 3850lbs race weight "Lost in fire"
03 Cobra Bone stock 12.42
68 Falcon 363ci 10.55@126 N/A
95 GT 363ci 11.08@118 N/A |
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Paul P Member

Joined: 15 Aug 2002 Posts: 2454 Location: Townsend, Mass. 83266.64 points
1971 Chevrolet Chevelle
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Posted: Thu May 17, 2012 8:08 pm Post subject: |
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Good idea take one of each apart and see if the internals are the same. The fact that you have all 8 intakes doing this and not the exhaust is what i see as the key here. That is why I say swap just 1 intake and 1 exhaust lifter as a quick test. _________________ 2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N/A
6.59@104.03 MPH 1/8mi
10.40@127.73 MPH 1/4mi
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af2 Member

Joined: 01 Sep 2003 Posts: 5579 Location: grassvalley, ca 71896.24 points
1933 Willys Coupe
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Posted: Thu May 17, 2012 8:16 pm Post subject: |
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William Jones wrote: | Have you checked the part# on the lifters is it possible they sent you solid lifters?
Bam |
Great point!! And a wtf moment.
I hope not. |
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