40 replies to this topic

[sam138]

Ok right so do some of the chains have less stretch in them when fitted ? which may take up the slack if I swap it over ? for example the limited stretch minispares one below. 

 

2H4905EVO - Mini timing chain duplex limited stretch type (minispares.com)

[KTS]

that's certainly possible, but by no means probable

 

the reality is that every single engine is different ( crank to cam distance, cam & crank sprocket sizes and wear etc) so the chance that any chain you buy is going to be a perfect fit for your engine is very slim

[Cooperman]

That does look one tooth retarded on the big pulley.
It is wise to always measure the cam timing accurately because some replacement parts can cause a build-up of machining tolerances and end up with the cam being several degrees out.
One of the biggest timing error I have seen was, from memory, about 7 degrees when timed dot-to-dot with a new Kent cam and budget duplex timing gears. An offset Woodruff key soon sorted it out.

[sam138]

Thanks, I’m going to get another non stretch duplex chain and see if this helps with the slack.

It’s my first time using a DTI gauge, please can you guys confirm that the below is reading 3 thou ? As I believe this gauge reads in mm (0.03mm) this picture is my crank end float.

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Edited by sam138, 12 February 2022 - 11:01 PM.

[gazza82]

3 thou would be 3 thousanths of an INCH, not mm.

[Cooper Mac]

That DTI is reading 30 microns (assuming that the pointer moved directly clockwise from the 0 and hasn’t done a full rotation or more) or 1.18 thou (0.00118 Inches).

Edited by Cooper Mac, 12 February 2022 - 11:59 PM.

[sam138]

Thanks for the help, so calculating I need 0.08mm on the gauge for 3 thou ? Should the crank have some play then when moved side to side ? Initially had new standard thrust washer set in there at 0.1mm which I now know is 3.93 thou but you could hear the crankshaft move side to side is that correct ?

Edited by sam138, 13 February 2022 - 08:51 AM.

[sonscar]

I hope you mean to and fro along its length?It has float but you would need to check how much.Steve..

[Cooperman]

Ideal longitudinal crankshaft end float is between 0.002" and 0.005".

[sam138]

I’ve now set up the crank end float as per below which shows 0.08mm or 3.15 thou. Is this ok for clearance?



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[Cooperman]

3 thou is absolutely ideal.