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proper valve clearance 16v

n xntrx volvo

n xntrx volvo

Newbie
Joined
Dec 5, 2003
Location
corinth, ms / los angeles
found some solid lifters to replace the hyd units in the 16v.
the b230 uses a .35-.4mm cold, .4-.45 mm hot clearance. should i use these for the 16v also?
fyi, the lifter is CEP2131726, avail from napa for 8.50 ea, or 25 for 8 on ebay new. its pre 84 vw watercooled (think gti)

the meas i have;
volvo:
dia 35mm (1.378")
total hieght 26mm (1.024")
actual unloaded 19.101mm (.752")
greenbook unloaded .724" (18.4mm)
greenbook loaded .636" (16.15mm)
vw:
dia 35mm (1.378")
total hieght 26mm (1.024")
actual thickness (0 shims) .243" (6.17mm)
shim thicknesses 3-4.2mm (.118-.165")

looking at lash caps to make up the diffence. (btw valve dia = 7mm, .276")
which spec should i be looking to match, loaded correct?
is there an easy way to measue distance from valve tip to base circle?
aiming for right in the center of shims, 3.6mm (.142")

my thinking is .636 (16v compressed)-243 (vw, no shims) = 393" - .016" (clearence) = .377"- .142" (avg shim) = lash cap of 235" (5.97mm).
sound right?

havent messed around much with solid tappets, so i migt be way off.
-Aaron
 
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Somebody with the Renault F2N tappets uses 0.15mm intake,0.35mm exhaust clearances.
Nice find on the tappets- buckets and shims, too?- any p/n on the shims?
 
i've been trying to get a set of the f2n tappets. (1.4 & 1.9 renualt engines in the 300 & 400 volvos for the rest of you). still want them so i can compare.
shims are reg vw watercooled solid shims. all the same, adi, 16v etc, as long as they're solid.

*edit* looks like these might be avail in the usa in renualt alliance (unconfirmed)*
 
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ahhh well , the shims are easy there 33mm .

the buckets may be different , and somebody has already asked to be first in the line for em :rofl:
 
hmm, max i'm seeing is 4.5mm lash caps.

16v valve specs
total length = 4.817"
distance top keeper ring to head = 4.393"
" middle" " " " = 4.287"
" lower " " " " = 4.185"

springs
uncompressed = 1.706"
od = 1.022"
id = 0.727

retainer
od = 1.095"
id spring cup = 0.702"
hiegth = 0.341

lower spring cup
thickness = 0.041"
 
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any pics of these F2n setup- should be lifter,shim bucket, right?
Any thoughts about valve silencers ala 8v solids?
 
i'd prefer not to use the silencers. dont want one falling apart, plus its extra wieght. from what i understand the f2n is that kind of setup. maybe foggy will set in a correct me.
btw, the vw are until 83 audi watercooled, until 84 vw watercooled
bosch # 056 109 311 A
another i've found
600-100900 35.00mm / 1.3765″ 1.300″ 1.000″ 0.105″ 0.312″ 0.130″
 
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n xntrx volvo said:
dia here
also kz900/1000 might work
an interesting link on converting stock hyd to solid

non-confirmed 35mm's
bmw 325
mb 560
Click to expand...
Interesting indeed, but some bad advice about flat surfacing the working surface, there should be an about 1 degree hemispherical finish, presuming you don't want to eat cam lobes in short order.

Bear in mind the VW watercool lifers are "shim above" which all the inter-net wisdon says will "likely" get spat out.

There's a Ford Diesel tappet in Pommie-land, I'll get the details later.
 
John V said:
Interesting indeed, but some bad advice about flat surfacing the working surface, there should be an about 1 degree hemispherical finish, presuming you don't want to eat cam lobes in short order.

Bear in mind the VW watercool lifers are "shim above" which all the inter-net wisdon says will "likely" get spat out.

There's a Ford Diesel tappet in Pommie-land, I'll get the details later.
Click to expand...
looks like alfa lifters are shim under bucket, and are just the bucket. so that'd require new valves and shimming the springs. #eng 1026, 006061217800, $8 each
possibly porsche 924,TURBO 76-82 unit (#046109311) might work, "
adjuster.jpg

"Cam Follower - picture from the bottom showing the flat side of the adjusting screw (below). No. The 924S hydraulic lifters do not fit. They are .020 too small diameter and the body is not deep enough. Shop around, watch for close outs. List is $79! Wholesale is about half that and since no one stocks them they should go for what? +15% and shipping? Good luck."
 
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"the hyd unit comes apart easily by pulling hard on the center part of the follower". indeed it does. maybe i'll turn these down to get back my clearance. thoughts?

a 16v hyd unit, exploded view
wMTE5NjQxNTZzNDEzZGZkMzF5NTQx.jpg

from left
tappet housing
retainer
hyd cyl and check valve
tension spring
button

fyi, to remove the retainer holding the hyd cyl in the button, you need to dremel it off very carefully.

hyd unit (button) dia = 13.97mm (.550")
hyd unit expanded = 16.61mm (.654")
hyd unit colapsed = 14.73mm (.580")
hyd cyl dia = .4205"
hyd cyl total hiegth = .456"
 
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alfa

were the alfa lifters confirmed 35mm dia? which cars were they from? There are a few alfa's sitting in some of the yards I go to. A shorter lifter is going to be a lot lighter in the end... although getting longer valves could be a drag.

james
 
spm

Yeah true the SPM ones also are just buckets. Could be same part as the alfa. Does he sell longer valves to go with them? The shims he shows do not look particularly thick.

The alfa tappets aren't exactly cheap unfortunately... I'll have to strip a few alfa's for their tappets the next time I'm at the yard.

james
 
I don't know if this is a no-brainer, but solid cams have a ramp that determines the lash. Hydraulic cams are zero lash, with no ramp. So a set of solid grind cams would be in order, or you may have premature wear no matter how you set the lash.
 
solid cams

I believe "hydraulic cams" just need to have a less agressive ramp in order not to collapse the lifter. I don't think we will have problems trying to run the stock "hydraulic" cam using solid lifters. Not that more agressive cams wouldn't be nice though.

Also, I think with the hydraulic lifters your actual lift is slightly reduced since at every opening the lifter will collapse slightly before locking up. I think this effect varies with the engine (some variable lift systems actually captalize on this).

james
 
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