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Unread 04-15-2013, 07:20 AM   #1
super98lsc
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1999 WJ 
 
Join Date: May 2006
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The valve tap

Starts tapping a minute or so after a cold start then fades out after 3-5 minutes. During warmup it will come and go, fading in and fading out. This is only the 3rd engine I have come across where a lifter will lose tension once primed. Marvel, Seafoam nothing helped, just going to drive it until I decide to either 1. Rebuild the 360 with Edelbrock heads and intake/header/Megasquirt or swap it for an LS with an Overdrive. For the cost of a good valve job, springs, new valves, retainers,keepers, having them milled/tapped for screw in studs/guide-plates and some port cleanup its not much more to just use the Aluminum head. Also make running more compression easier to live with on pump gas.

https://www.youtube.com/watch?v=8Xp1s1-nmbU

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00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 04-15-2013, 08:19 AM   #2
RockRollin
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WOW! That is very pronounced.
I definitely understand thinking it was wrist pin
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Unread 04-16-2013, 08:12 AM   #3
super98lsc
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Well I thought it might be a pin or skirt issue until it developed the classic tap tap tap. At first it was more of just a dull clerking sound. Which is what it returns too once warmed up.
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06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 04-17-2013, 08:22 PM   #4
revelc
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That sounds like the noise my 360 made before I pulled it. Any updates?
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-17-2013, 08:50 PM   #5
super98lsc
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Nope taps till stops drives great otherwise. Gonna run it for now got laid off Monday. once I start new job ill snag a 401 shortblock and build it with good pistons with edelbrock heads, solid lifter cam, performer rpm air gap drilled,milled for fuel rails and injectors and use a megasquirt 3 to fire it and a cop setup. With the tq of an injected 401 and ramp rates of solid grind I bet ill get 15 hwy w a 4l80e behind it. The plugs on the 360 still look new after 10k miles, leaks but doesnt burn oil and gets right at 14.2mpg hwy if I stay under 70. City is about 10. I did swap my hei module up to an accel unit and removed the resistor wire replacing with a new home run from the fuse panel. picked up 50rpm at idle just from that change. Timing is 20 base but centrifugal is only adding 13 by 3k. I.need to recurve it, for more total and coming in faster. Id like to see how 36-38 by 2500 feels and maybe a tad less initial. Im on a strict diet of 93 octane
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06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 04-17-2013, 08:58 PM   #6
revelc
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Sorry about the job super times are tough. I look forward to your 401 build. I will pray a job your way man.

Would you mind looking at my shout out for AMC builders and chime in?
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-17-2013, 09:06 PM   #7
revelc
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Double post
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Wag Rebuilt 360, 260H, 727, Locked 44, AMC 20, 208, 31" M/T's, 4" Rustys, 2.5" Duals. SOON:SOA SF, 496, T400, Doubler, D60's, 37" M/T's <-TOY
Cherokee Rebuilt 360, 2" Duals, mostly stock. SOON: Hot Street 401, 4'' Rustys, 33" BFG A/T's maybe a T-case to get rid of Q-Track <-TOW RIG
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Unread 04-18-2013, 08:40 PM   #8
super98lsc
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Ok, I yanked out the distributor and.rebuilt it, recurved it. as suspected the limiter was on the small slot. I moved it to the large slot and used two lighter springs. 30 deg in by 2200 and 36 by 2800. Now I can set base at 15 vs 20 where its been. Then found my intake bolts to be finger tight so re torqued those down. Runs a ton stronger, smoother etc. I know intake needs pulled and new gaskets but im going to wait and do the 4 barrel swap,cam, heads all at once.
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06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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