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hydraulic lifter problems
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bowtie44s
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Joined: 13 May 2012
Posts: 16

772.34 points



PostPosted: Tue May 15, 2012 10:50 pm    Post subject: Reply with quote

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
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Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Wed May 16, 2012 9:05 am    Post subject: Reply with quote

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
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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bowtie44s
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Joined: 13 May 2012
Posts: 16

772.34 points



PostPosted: Wed May 16, 2012 12:04 pm    Post subject: Reply with quote

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: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Wed May 16, 2012 12:33 pm    Post subject: Reply with quote

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
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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Big Dave
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Joined: 04 Dec 2005
Posts: 2646
Location: Tampa Florida
119973.02 points



PostPosted: Thu May 17, 2012 7:37 pm    Post subject: Reply with quote

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
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Joined: 30 Jan 2006
Posts: 823
Location: Lake city, FL
28541.86 points


1971 Ford Mustang

PostPosted: Thu May 17, 2012 7:41 pm    Post subject: Reply with quote

Have you checked the part# on the lifters is it possible they sent you solid lifters?

Bam

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Take the horse out off the barn and let her RUN BABY RUN!!!!!

92 LX 454ci Clevor 9.24@142.53 N/A
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Paul P
Member


Joined: 15 Aug 2002
Posts: 2404
Location: Townsend, Mass.
81616.60 points


1971 Chevrolet Chevelle

PostPosted: Thu May 17, 2012 8:08 pm    Post subject: Reply with quote

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
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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af2
Member


Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
71227.76 points


1933 Willys Coupe

PostPosted: Thu May 17, 2012 8:16 pm    Post subject: Reply with quote

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. Laughing
I hope not.
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